Pub Date : 2023-08-04DOI: 10.1590/1983-40632023v5375552
Carlos Cesar Silva Jardim, D. Casaroli, José Alves Júnior, A. W. P. Evangelista, R. Battisti
ABSTRACT Rainfall is a fundamental component of agricultural production, and knowing its potential and variability can ensure the success of this activity. However, the number of meteorological stations is still small, even in states with agricultural aptitude, such as Goiás. Geoprocessing techniques can be used to overcome this problem. Thus, this study aimed to evaluate the products of the Tropical Rainfall Measuring Mission (TRMM) satellite to describe the annual and monthly rainfall variability in the Goiás state and the Federal District (Brazil). Interpolations were carried out to increase the spatial resolution by means of ordinary kriging and cluster analysis for spatial and temporal distribution. It was observed that the evaluated territory can be classified into three regions with differentiated water regimes up to 500 mm annually, with seasonality of accumulated precipitation from November to March. Even though the regression evaluation showed limitations for a monthly precipitation above 200 mm, the analysis of the TRMM satellite products demonstrated that this tool allows forecasts of provisional normals with a higher spatial resolution than the Brazilian National Institute of Meteorology (INMET) stations network, with known measurement errors for each evaluation period, allowing the data application in forecast models for agricultural planning involving water management.
{"title":"Statistical downscaling in the TRMM satellite rainfall estimates for the Goiás state and the Federal District, Brazil","authors":"Carlos Cesar Silva Jardim, D. Casaroli, José Alves Júnior, A. W. P. Evangelista, R. Battisti","doi":"10.1590/1983-40632023v5375552","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375552","url":null,"abstract":"ABSTRACT Rainfall is a fundamental component of agricultural production, and knowing its potential and variability can ensure the success of this activity. However, the number of meteorological stations is still small, even in states with agricultural aptitude, such as Goiás. Geoprocessing techniques can be used to overcome this problem. Thus, this study aimed to evaluate the products of the Tropical Rainfall Measuring Mission (TRMM) satellite to describe the annual and monthly rainfall variability in the Goiás state and the Federal District (Brazil). Interpolations were carried out to increase the spatial resolution by means of ordinary kriging and cluster analysis for spatial and temporal distribution. It was observed that the evaluated territory can be classified into three regions with differentiated water regimes up to 500 mm annually, with seasonality of accumulated precipitation from November to March. Even though the regression evaluation showed limitations for a monthly precipitation above 200 mm, the analysis of the TRMM satellite products demonstrated that this tool allows forecasts of provisional normals with a higher spatial resolution than the Brazilian National Institute of Meteorology (INMET) stations network, with known measurement errors for each evaluation period, allowing the data application in forecast models for agricultural planning involving water management.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67252252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-04DOI: 10.1590/1983-40632023v5375376
A. Nascente, Zainab Temitope Ishola, M. Filippi, M. A. Silva, D. R. C. Cruz, Gustavo de Andrade Bezerra
ABSTRACT The increasing demand for using microorganisms in agriculture to improve food production requires constantly assessing microbial diversity. This study aimed to investigate the biochemical properties of individual and combined multifunctional microorganisms, as well as to identify potential applications in biotechnology or agriculture. The experiment comprised 29 treatments, with 7 single and 21 combined microorganisms: M01 (Serratia marcescens), M02 (Bacillus toyonensis), M03 (Phanerochaete australis), M04 (Trichoderma koningiopsis), M05 (Azospirillum brasilense), M06 (Azospirillum sp.), M07 (Bacillus sp.), M08 to M28 (combination among these microorganisms) and M29 (control - no microorganisms). All the single and combined treatments assimilated nitrogen, produced siderophores and indoleacetic acid and solubilized phosphate. Only the treatments M04, M13 and M26 produced HCN. Additionally, all treatments, except for M03, produced biofilm. Only M03, M07, M09, M10, M12 and M13 solubilized potassium.
{"title":"Biochemical characterization of individual and combined plant growth-promoting microorganisms","authors":"A. Nascente, Zainab Temitope Ishola, M. Filippi, M. A. Silva, D. R. C. Cruz, Gustavo de Andrade Bezerra","doi":"10.1590/1983-40632023v5375376","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375376","url":null,"abstract":"ABSTRACT The increasing demand for using microorganisms in agriculture to improve food production requires constantly assessing microbial diversity. This study aimed to investigate the biochemical properties of individual and combined multifunctional microorganisms, as well as to identify potential applications in biotechnology or agriculture. The experiment comprised 29 treatments, with 7 single and 21 combined microorganisms: M01 (Serratia marcescens), M02 (Bacillus toyonensis), M03 (Phanerochaete australis), M04 (Trichoderma koningiopsis), M05 (Azospirillum brasilense), M06 (Azospirillum sp.), M07 (Bacillus sp.), M08 to M28 (combination among these microorganisms) and M29 (control - no microorganisms). All the single and combined treatments assimilated nitrogen, produced siderophores and indoleacetic acid and solubilized phosphate. Only the treatments M04, M13 and M26 produced HCN. Additionally, all treatments, except for M03, produced biofilm. Only M03, M07, M09, M10, M12 and M13 solubilized potassium.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67252171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-04DOI: 10.1590/1983-40632023v5375488
Bárbara Bagio, I. Bertol, N. Wolschick, Loriane Bernardi, Marco Fruhauf de Oliveira
ABSTRACT The native field area in southern Brazil has been reduced due to cultivation, and part of the remainder is traditionally burned and may increase water erosion and soil degradation. In this research, the soil chemical composition and water erosion, under natural rainfall, were evaluated in an Inceptisol, in the south of the Santa Catarina state plateau. The treatments consisted of native field, field mowed and burned once a year, and field cultivated under no-tillage conditions, in plots of 3.5 x 22.1 m and average slope of 10 %. The water erosion was evaluated between November 2016 and September 2018, when there were 61 erosive rainfalls, totaling 1,997 mm and 8,472 MJ mm ha-1 h-1. The soil losses were 82 kg ha-1 in the cultivated field, 55 kg ha-1 in the burned field and 24 kg ha-1 in the native field; and the water losses, in relation to the total rainfall, were 2.2 % in the native field and cultivated field and 1.2 % in the burned field.
巴西南部的原生农田面积由于种植而减少，其余部分传统上被焚烧，这可能会增加水土流失和土壤退化。在本研究中，对圣卡塔琳娜州高原南部的Inceptisol地区在自然降雨条件下的土壤化学成分和水分侵蚀进行了评估。这些处理包括原生田，每年一次刈烧田，以及在免耕条件下种植的田，地块面积为3.5 x 22.1 m，平均坡度为10%。2016年11月—2018年9月共发生侵蚀性降雨61次，共1997 mm, 8472 MJ mm ha-1 h-1。耕地土壤流失量为82 kg ha-1，烧地土壤流失量为55 kg ha-1，原生土壤流失量为24 kg ha-1;与总降雨量相比，天然田和耕地的失水率分别为2.2%和1.2%。
{"title":"Influence of native field management on soil, water erosion and nutrient losses","authors":"Bárbara Bagio, I. Bertol, N. Wolschick, Loriane Bernardi, Marco Fruhauf de Oliveira","doi":"10.1590/1983-40632023v5375488","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375488","url":null,"abstract":"ABSTRACT The native field area in southern Brazil has been reduced due to cultivation, and part of the remainder is traditionally burned and may increase water erosion and soil degradation. In this research, the soil chemical composition and water erosion, under natural rainfall, were evaluated in an Inceptisol, in the south of the Santa Catarina state plateau. The treatments consisted of native field, field mowed and burned once a year, and field cultivated under no-tillage conditions, in plots of 3.5 x 22.1 m and average slope of 10 %. The water erosion was evaluated between November 2016 and September 2018, when there were 61 erosive rainfalls, totaling 1,997 mm and 8,472 MJ mm ha-1 h-1. The soil losses were 82 kg ha-1 in the cultivated field, 55 kg ha-1 in the burned field and 24 kg ha-1 in the native field; and the water losses, in relation to the total rainfall, were 2.2 % in the native field and cultivated field and 1.2 % in the burned field.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67252246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-04DOI: 10.1590/1983-40632023v5375339
D. H. Mursyidin
ABSTRACT Mango and its wild relatives (Mangifera spp.) are essential for future mango breeding, including preservation programs, because they provide many beneficial genes (agronomic traits), particularly those related to resistance to biotic and abiotic stressors. However, there is a limited understanding of the genetic diversity and relationships of this germplasm. This study aimed to determine the diversity and relationship between endemic mango and its wild relatives (Mangifera spp.) from Borneo Island, Indonesia, using leaf morphology and the internal transcribed spacer (ITS) region. Fifteen samples of Mangifera, covering 12 species, were used. Morphologically, the endemic Mangifera had a low diversity of only 0.22. Based on the ITS sequence, Mangifera endemic to Borneo had a high level of genetic diversity (0.069). In addition, this sequence had a total variable number of 215 bp, of which 110 bp were singleton sites, 89 informative parsimony and 41 indels. Phylogenetic analysis showed that Mangifera was grouped into three clusters for leaf morphological traits and four clades for the ITS region. In this case, the furthest relationship was pointed out by ‘Hampalam’ (M. laurina) and ‘Tambusui’ (M. macrocarpa), as well as by ‘Rawa-Rawa’ (M. similis) and ‘Samputar’ (M. torquenda). In contrast, the closest relationship was shown by ‘Hambawang Damar’ (M. foetida) and ‘Hambawang Puntara’ (M. foetida), including ‘Samputar’ (M. torquenda) and ‘Pauh’ (M. quadrifida). In particular, the common mango (M. indica) was closely related to ‘Asam Buluh’ and ‘Hampalam’ (M. laurina) and distantly related to ‘Pauh’ (M. quadrifida) and ‘Rawa-Rawa’ (M. similis).
{"title":"Genetic diversity and relationship of mango and its wild relatives (Mangifera spp.) based on morphological and molecular markers","authors":"D. H. Mursyidin","doi":"10.1590/1983-40632023v5375339","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375339","url":null,"abstract":"ABSTRACT Mango and its wild relatives (Mangifera spp.) are essential for future mango breeding, including preservation programs, because they provide many beneficial genes (agronomic traits), particularly those related to resistance to biotic and abiotic stressors. However, there is a limited understanding of the genetic diversity and relationships of this germplasm. This study aimed to determine the diversity and relationship between endemic mango and its wild relatives (Mangifera spp.) from Borneo Island, Indonesia, using leaf morphology and the internal transcribed spacer (ITS) region. Fifteen samples of Mangifera, covering 12 species, were used. Morphologically, the endemic Mangifera had a low diversity of only 0.22. Based on the ITS sequence, Mangifera endemic to Borneo had a high level of genetic diversity (0.069). In addition, this sequence had a total variable number of 215 bp, of which 110 bp were singleton sites, 89 informative parsimony and 41 indels. Phylogenetic analysis showed that Mangifera was grouped into three clusters for leaf morphological traits and four clades for the ITS region. In this case, the furthest relationship was pointed out by ‘Hampalam’ (M. laurina) and ‘Tambusui’ (M. macrocarpa), as well as by ‘Rawa-Rawa’ (M. similis) and ‘Samputar’ (M. torquenda). In contrast, the closest relationship was shown by ‘Hambawang Damar’ (M. foetida) and ‘Hambawang Puntara’ (M. foetida), including ‘Samputar’ (M. torquenda) and ‘Pauh’ (M. quadrifida). In particular, the common mango (M. indica) was closely related to ‘Asam Buluh’ and ‘Hampalam’ (M. laurina) and distantly related to ‘Pauh’ (M. quadrifida) and ‘Rawa-Rawa’ (M. similis).","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"11 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67252102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-08-04DOI: 10.1590/1983-40632023v5375444
Lucas Gimenes Mota, Rodrigo Schaurich Mativi Righi, C. F. D. Duarte, C. E. A. Cabral, C. Cabral
ABSTRACT Grass regrowth can reduce root mass, delaying reestablishment and grazing periods by reducing the nutrient absorption from the soil by plants. This study aimed to determine the optimal intervals for harvest and nitrogen fertilization in Urochloa brizantha cv. BRS Piatã and Megathyrsus maximus cv. BRS Quênia, as well as to investigate whether the flexibility of the fertilization time is related to the accumulation of water-soluble carbohydrates (WSC) and nitrogen in the roots. The experiment was conducted in a greenhouse, using a completely randomized design, with five treatments (nitrogen fertilization after harvest: 0, 2, 4, 6 and 8 days) and ten replicates. The nitrogen fertilization time linearly reduced the forage and root mass for the BRS Piatã, but had no effect on the BRS Quênia guinea grass. For the BRS Piatã, the WSC and starch concentrations in the roots showed a quadratic response, decreasing from harvest to day 2 and increasing until the day 8. However, the delayed fertilization led to a linear reduction in the root nitrogen content. The nitrogen fertilization time had a quadratic effect on the WSC concentration for the BRS Quênia roots. For the BRS Piatã, the nitrogen fertilization immediately after harvest improves the forage and root masses, WSC and nitrogen reserves. In contrast, the BRS Quênia exhibited a greater flexibility, concerning the nitrogen fertilization time. The interval between harvest and nitrogen fertilization is primarily depended on root mass, which influences the nitrogen accumulation in the roots.
{"title":"Nitrogen fertilization time affects the root reserves of tropical grasses","authors":"Lucas Gimenes Mota, Rodrigo Schaurich Mativi Righi, C. F. D. Duarte, C. E. A. Cabral, C. Cabral","doi":"10.1590/1983-40632023v5375444","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375444","url":null,"abstract":"ABSTRACT Grass regrowth can reduce root mass, delaying reestablishment and grazing periods by reducing the nutrient absorption from the soil by plants. This study aimed to determine the optimal intervals for harvest and nitrogen fertilization in Urochloa brizantha cv. BRS Piatã and Megathyrsus maximus cv. BRS Quênia, as well as to investigate whether the flexibility of the fertilization time is related to the accumulation of water-soluble carbohydrates (WSC) and nitrogen in the roots. The experiment was conducted in a greenhouse, using a completely randomized design, with five treatments (nitrogen fertilization after harvest: 0, 2, 4, 6 and 8 days) and ten replicates. The nitrogen fertilization time linearly reduced the forage and root mass for the BRS Piatã, but had no effect on the BRS Quênia guinea grass. For the BRS Piatã, the WSC and starch concentrations in the roots showed a quadratic response, decreasing from harvest to day 2 and increasing until the day 8. However, the delayed fertilization led to a linear reduction in the root nitrogen content. The nitrogen fertilization time had a quadratic effect on the WSC concentration for the BRS Quênia roots. For the BRS Piatã, the nitrogen fertilization immediately after harvest improves the forage and root masses, WSC and nitrogen reserves. In contrast, the BRS Quênia exhibited a greater flexibility, concerning the nitrogen fertilization time. The interval between harvest and nitrogen fertilization is primarily depended on root mass, which influences the nitrogen accumulation in the roots.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67252183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-07DOI: 10.1590/1983-40632023v5374945
Layanara Oliveira Faria, A. Souza, Matheus Correa de Mello, Mariana Pina da Silva Berti
ABSTRACT Soil microorganisms are of paramount importance for crop yield. This study aimed to evaluate the effect of potassium chloride doses associated with two bioactivation sources on soybean yield and soil microbial activity. The experimental design was randomized blocks, arranged in a 5 x 2 factorial scheme, with four replications, being the first factor potassium doses (0, 30, 60, 90 and 120 kg ha-1 of K2O), using potassium chloride as a source, and the second factor soil bioactivation products: Penergetic (250 g ha-1) and Efficient Microorganisms (EM) (1:250), with 250 L ha-1 of spray volume. The KCl doses affected the soil microbial activity, while the soil bioactivating sources with the potassium chloride doses did not show significance for the leaf potassium content and soybean yield. K2O doses higher than the maintenance dose for the soybean crop with EM negatively influenced the soil microbial biomass. The EM bioactivator associated with the maintenance dose of K for the soybean crop (60 kg ha-1) is the most appropriate treatment for soil microbial activity, as it is the condition that presents the most stable environment and the highest microbial efficiency.
土壤微生物对作物产量至关重要。本研究旨在评价两种生物活性源联合施用氯化钾对大豆产量和土壤微生物活性的影响。试验设计采用随机分组，按5 × 2因子设计，设4个重复，以氯化钾为源，第一因子钾剂量(0、30、60、90和120 kg ha-1 K2O)，第二因子土壤生物激活产物:透能(250 g ha-1)和高效微生物(EM)(1:250)，喷雾量250 L ha-1。KCl剂量对土壤微生物活性有影响，而氯化钾剂量的土壤生物活性源对叶片钾含量和大豆产量无显著影响。K2O剂量高于EM大豆作物维持剂量对土壤微生物量有负向影响。EM生物活化剂与大豆作物K维持剂量(60 kg ha-1)相关联，是土壤微生物活性最适宜的处理，因为它是环境最稳定、微生物效率最高的条件。
{"title":"Potassium fertilization and bioactivators on the soybean yield and soil microbiota","authors":"Layanara Oliveira Faria, A. Souza, Matheus Correa de Mello, Mariana Pina da Silva Berti","doi":"10.1590/1983-40632023v5374945","DOIUrl":"https://doi.org/10.1590/1983-40632023v5374945","url":null,"abstract":"ABSTRACT Soil microorganisms are of paramount importance for crop yield. This study aimed to evaluate the effect of potassium chloride doses associated with two bioactivation sources on soybean yield and soil microbial activity. The experimental design was randomized blocks, arranged in a 5 x 2 factorial scheme, with four replications, being the first factor potassium doses (0, 30, 60, 90 and 120 kg ha-1 of K2O), using potassium chloride as a source, and the second factor soil bioactivation products: Penergetic (250 g ha-1) and Efficient Microorganisms (EM) (1:250), with 250 L ha-1 of spray volume. The KCl doses affected the soil microbial activity, while the soil bioactivating sources with the potassium chloride doses did not show significance for the leaf potassium content and soybean yield. K2O doses higher than the maintenance dose for the soybean crop with EM negatively influenced the soil microbial biomass. The EM bioactivator associated with the maintenance dose of K for the soybean crop (60 kg ha-1) is the most appropriate treatment for soil microbial activity, as it is the condition that presents the most stable environment and the highest microbial efficiency.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67251763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-07DOI: 10.1590/1983-40632023v5375032
A. C. D. B. Ferreira, A. L. D. C. Borin, F. M. Lamas, Valdinei Sofiatti
ABSTRACT The cultivation of cover plants is a strategy for improving the agricultural production environment and providing straw for soil cover in the no-tillage system, in addition to cycling and providing nutrients to succeeding crops. This study aimed to assess the dry matter yield and nutrients accumulation by cover plants grown alone or intercropped in the second crop after soybean and their effects on cotton grown in succession. The treatments were: Urochloa ruziziensis; Pennisetum glaucum (millet); Zea mays (corn); Crotalaria spectabilis; Crotalaria ochroleuca; Cajanus cajan (pigeon pea); corn + U. ruziziensis; C. spectabilis + U. ruziziensis; C. ochroleuca + U. ruziziensis; pigeon pea + U. ruziziensis; corn + C. spectabilis; corn + C. ochroleuca; and corn + pigeon pea. The experimental design consisted of randomized blocks, with four replications, and the experiment was carried out in two crop seasons. In the cotton pre-seeding, the maximum amount of corn straw dry matter was 2,699 kg ha-1, with low macronutrient contents. The pigeon pea intercropped with U. ruziziensis produced between 8,400 and 12,941 kg ha-1 of dry matter, with a maximum content of 223 and 323 kg ha-1 of nitrogen and potassium, respectively. The U. ruziziensis, grown alone or intercropped, provided between 140 and 323 kg ha-1 of potassium in the straw. A high yield is obtained by cotton grown in the no-tillage system in succession to C. spectabilis.
在免耕制度下，覆盖植物的种植是改善农业生产环境和为土壤覆盖提供秸秆的一种策略，除了循环和为后续作物提供养分之外。本研究旨在探讨大豆后第二季单作和间作覆盖植物对棉花干物质产量和养分积累的影响及其对棉花连作的影响。治疗方法为:尿毒症;狼尾草(粟);玉米(Zea mays);Crotalaria海棠;Crotalaria ochroleuca;鸽豆;玉米+ U. ruziziensis;C. spectabilis + U. ruziziensis;C. ochroleuca + U. ruziziensis;鸽豆+褐豆;玉米+ C. spectabilis;玉米+ C. ochroleuca;还有玉米和鸽子豆。试验设计为随机区组，4个重复，试验分两个作物季进行。棉花预播时，玉米秸秆干物质最大用量为2699 kg hm -1，宏量营养素含量较低。间作豇豆的干物质产量为8400 ~ 12941 kg ha-1，氮、钾含量最高分别为223和323 kg ha-1。单独种植或间作的紫穗菊在秸秆中提供了140至323公斤每公顷的钾。棉花在免耕制度下连续种植可获得较高的产量。
{"title":"Cover plants in second crop: nutrients in straw and cotton yield in succession","authors":"A. C. D. B. Ferreira, A. L. D. C. Borin, F. M. Lamas, Valdinei Sofiatti","doi":"10.1590/1983-40632023v5375032","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375032","url":null,"abstract":"ABSTRACT The cultivation of cover plants is a strategy for improving the agricultural production environment and providing straw for soil cover in the no-tillage system, in addition to cycling and providing nutrients to succeeding crops. This study aimed to assess the dry matter yield and nutrients accumulation by cover plants grown alone or intercropped in the second crop after soybean and their effects on cotton grown in succession. The treatments were: Urochloa ruziziensis; Pennisetum glaucum (millet); Zea mays (corn); Crotalaria spectabilis; Crotalaria ochroleuca; Cajanus cajan (pigeon pea); corn + U. ruziziensis; C. spectabilis + U. ruziziensis; C. ochroleuca + U. ruziziensis; pigeon pea + U. ruziziensis; corn + C. spectabilis; corn + C. ochroleuca; and corn + pigeon pea. The experimental design consisted of randomized blocks, with four replications, and the experiment was carried out in two crop seasons. In the cotton pre-seeding, the maximum amount of corn straw dry matter was 2,699 kg ha-1, with low macronutrient contents. The pigeon pea intercropped with U. ruziziensis produced between 8,400 and 12,941 kg ha-1 of dry matter, with a maximum content of 223 and 323 kg ha-1 of nitrogen and potassium, respectively. The U. ruziziensis, grown alone or intercropped, provided between 140 and 323 kg ha-1 of potassium in the straw. A high yield is obtained by cotton grown in the no-tillage system in succession to C. spectabilis.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67251810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-07DOI: 10.1590/1983-40632023v5375038
Luiza Vieira da Cruz, Marcos Henrique Faleiros Santos, Bryna Tamilla Alves Falcão Gama, L. G. Araújo, A. Terezan, J. R. O. Oliveira Neto, L. C. Cunha, Anselmo Elcana de Oliveira, Márcia Matos da Silva, Carla Thaís Pereira Coelho, V. G. Severino
ABSTRACT Rice blast caused by the Magnaporthe oryzae pathogen is a major disease in this crop, and may cause devastating losses. This study aimed to investigate the profile of Waitea circinata mycorrhiza volatile compounds in antagonism to M. oryzae, under different growth periods and temperatures, using a completely randomized design. Volatile organic compounds were extracted by headspace solid phase microextraction and analyzed by gas chromatography mass spectrometry, while multidimensional scaling was used to compare the produced volatile organic compounds. The main compounds responsible by the antagonism to M. oryzae were longifolene, trans-β-farnesene, (Z)-α-bisabolene and δ-amorphene, which can be used as biofungicides and incorporated into rice blast management strategies.
{"title":"Profile of volatile compounds released by Waitea circinata against Magnaporthe oryzae under different periods and temperatures","authors":"Luiza Vieira da Cruz, Marcos Henrique Faleiros Santos, Bryna Tamilla Alves Falcão Gama, L. G. Araújo, A. Terezan, J. R. O. Oliveira Neto, L. C. Cunha, Anselmo Elcana de Oliveira, Márcia Matos da Silva, Carla Thaís Pereira Coelho, V. G. Severino","doi":"10.1590/1983-40632023v5375038","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375038","url":null,"abstract":"ABSTRACT Rice blast caused by the Magnaporthe oryzae pathogen is a major disease in this crop, and may cause devastating losses. This study aimed to investigate the profile of Waitea circinata mycorrhiza volatile compounds in antagonism to M. oryzae, under different growth periods and temperatures, using a completely randomized design. Volatile organic compounds were extracted by headspace solid phase microextraction and analyzed by gas chromatography mass spectrometry, while multidimensional scaling was used to compare the produced volatile organic compounds. The main compounds responsible by the antagonism to M. oryzae were longifolene, trans-β-farnesene, (Z)-α-bisabolene and δ-amorphene, which can be used as biofungicides and incorporated into rice blast management strategies.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67251824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-07DOI: 10.1590/1983-40632023v5375126
L. L. Pires, Bruno Arcanjo Silva, E. S. Sousa, Enedina Rodrigues da Silva Neta, Sidney G. Lima, J. E. A. Beserra Júnior
ABSTRACT The search for vegetable extracts for phytosanitary control has been expanded to find new active ingredients to control plant diseases. This study aimed to evaluate the in vitro effect of the fixed constituents of Copaifera luetzelburgii, Croton zehntneri and Lippia lasiocalycina, at the concentrations of 2, 20, 200 and 2,000 μg mL-1, on the percentage of mycelial growth inhibition of Colletotrichum siamense, C. truncatum, Fusarium sacchari, F. udum, Lasiodiplodia theobromae and Thielaviopsis ethacetica, as well as the conidium concentration of C. siamense, F. sacchari and F. udum produced in culture medium with all the extracts. The tested ethanolic extract, especially at the highest concentration, inhibited the percentage of mycelial growth and/or conidium concentration of the evaluated fungi. The other concentrations showed low inhibitory effects or no activity against the fungi. The average values for percentage of mycelial growth inhibition of the ethanolic extract from L. lasiocalycina, C. zehntneri and C. luetzelburgii against the six fungi were 62.5, 53.4 and 51.0 %, respectively. The ethanolic extract of L. lasiocalycina showed the most significant effect on the percentage of mycelial growth inhibition and conidia concentration. The fixed constituents of C. luetzelburgii, C. zehntneri and L. lasiocalycina at 2,000 μg mL-1 showed to be efficient in inhibiting the mycelial growth of C. siamense, C. truncatum, F. sacchari, F. udum, L. theobromae and T. ethacetica, and inhibit the conidia production of C. siamense, F. sacchari and F. udum.
{"title":"Ethanolic extract of Copaifera, Croton and Lippia on the control of phytopathogenic fungi","authors":"L. L. Pires, Bruno Arcanjo Silva, E. S. Sousa, Enedina Rodrigues da Silva Neta, Sidney G. Lima, J. E. A. Beserra Júnior","doi":"10.1590/1983-40632023v5375126","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375126","url":null,"abstract":"ABSTRACT The search for vegetable extracts for phytosanitary control has been expanded to find new active ingredients to control plant diseases. This study aimed to evaluate the in vitro effect of the fixed constituents of Copaifera luetzelburgii, Croton zehntneri and Lippia lasiocalycina, at the concentrations of 2, 20, 200 and 2,000 μg mL-1, on the percentage of mycelial growth inhibition of Colletotrichum siamense, C. truncatum, Fusarium sacchari, F. udum, Lasiodiplodia theobromae and Thielaviopsis ethacetica, as well as the conidium concentration of C. siamense, F. sacchari and F. udum produced in culture medium with all the extracts. The tested ethanolic extract, especially at the highest concentration, inhibited the percentage of mycelial growth and/or conidium concentration of the evaluated fungi. The other concentrations showed low inhibitory effects or no activity against the fungi. The average values for percentage of mycelial growth inhibition of the ethanolic extract from L. lasiocalycina, C. zehntneri and C. luetzelburgii against the six fungi were 62.5, 53.4 and 51.0 %, respectively. The ethanolic extract of L. lasiocalycina showed the most significant effect on the percentage of mycelial growth inhibition and conidia concentration. The fixed constituents of C. luetzelburgii, C. zehntneri and L. lasiocalycina at 2,000 μg mL-1 showed to be efficient in inhibiting the mycelial growth of C. siamense, C. truncatum, F. sacchari, F. udum, L. theobromae and T. ethacetica, and inhibit the conidia production of C. siamense, F. sacchari and F. udum.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67251883","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-07DOI: 10.1590/1983-40632023v5375156
M. Freire, G. G. Sousa, T. V. D. A. Viana, C. Lessa, F. H. R. Costa
ABSTRACT The use of brackish water causes chemical changes in cultivated soils. It is therefore necessary to apply strategies that can minimize its negative impacts, such as the use of organic fertilizers. This study aimed to evaluate in the field the chemical attributes of a Red Yellow Argisol under irrigation with saline water and organic fertilizing in an area cultivated with corn. The design was randomized blocks, in a split-plot scheme, with the plots comprising salinity levels for the irrigation water (0.8 and 3.0 dS m-1) and the subplots combinations of organic fertilizers (cattle manure + poultry biofertilizer + goat biofertilizer; cattle manure + goat biofertilizer; cattle manure + poultry biofertilizer; control), with four replications. The 3.0 dS m-1 irrigation has a negative effect on the soil chemical attributes, particularly reducing the pH and increasing the sodium, exchangeable sodium percentage and electrical conductivity of the soil saturation extract. The combination of cattle manure + poultry biofertilizer + goat biofertilizer mitigates the salt stress by favouring the accumulation of nitrogen and organic matter, while the cattle manure + poultry biofertilizer favours the potassium accumulation in the soil. The combination of cattle manure + poultry biofertilizer + goat biofertilizer increases the contents of phosphorus and potassium when using the 0.8 dS m-1 irrigation.
{"title":"Soil chemical attributes under combinations of organic fertilizing and water salinity","authors":"M. Freire, G. G. Sousa, T. V. D. A. Viana, C. Lessa, F. H. R. Costa","doi":"10.1590/1983-40632023v5375156","DOIUrl":"https://doi.org/10.1590/1983-40632023v5375156","url":null,"abstract":"ABSTRACT The use of brackish water causes chemical changes in cultivated soils. It is therefore necessary to apply strategies that can minimize its negative impacts, such as the use of organic fertilizers. This study aimed to evaluate in the field the chemical attributes of a Red Yellow Argisol under irrigation with saline water and organic fertilizing in an area cultivated with corn. The design was randomized blocks, in a split-plot scheme, with the plots comprising salinity levels for the irrigation water (0.8 and 3.0 dS m-1) and the subplots combinations of organic fertilizers (cattle manure + poultry biofertilizer + goat biofertilizer; cattle manure + goat biofertilizer; cattle manure + poultry biofertilizer; control), with four replications. The 3.0 dS m-1 irrigation has a negative effect on the soil chemical attributes, particularly reducing the pH and increasing the sodium, exchangeable sodium percentage and electrical conductivity of the soil saturation extract. The combination of cattle manure + poultry biofertilizer + goat biofertilizer mitigates the salt stress by favouring the accumulation of nitrogen and organic matter, while the cattle manure + poultry biofertilizer favours the potassium accumulation in the soil. The combination of cattle manure + poultry biofertilizer + goat biofertilizer increases the contents of phosphorus and potassium when using the 0.8 dS m-1 irrigation.","PeriodicalId":46867,"journal":{"name":"Pesquisa Agropecuaria Tropical","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67251946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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