Pub Date : 2021-12-13DOI: 10.5039/agraria.v16i4a9096
J. D. Soares, M. O. Paula, A. Carneiro, L. J. Costa, A.C. Oliveira, B. Pereira
: The friability, an important quality parameter, is the ability of charcoal to generate fines when it is moved. However, there is no standard for determining the compressive strength of charcoal beds. Thus, the objective of this work was to evaluate some test parameters for determining the generation of charcoal fines in a manual hydraulic press. Charcoal was produced with eucalyptus logs 7 years old, diameters of 10 to 12 cm, and length of 1 m in a circular surface kiln, with a maximum carbonization temperature of 400 ºC and a total time of 58 hours. For methodology evaluation, charcoal mechanical tests were performed in a manual hydraulic press, using as test variables four charcoal granulometric ranges (12.7 to 19.5; 19.5 to 25.4; 25.4 to 31.7 and 31.7 to 50.8 mm) and five compressive loads (1; 1.5; 2; 3 and 5 t). The reference was the drum test. The method of evaluating the mechanical strength using a manual hydraulic press is suitable for determining the strength of a charcoal bed, because it represents the efforts that charcoal supports in industrial systems. The test parameters recommended for determining the mechanical strength of charcoal, using a manual hydraulic press, are: compressive load of one ton; charcoal with granulometry of 19.5 to 50.8 mm; average velocity of force application of 1 mm s -1 ; and, charcoal time under pressure equal to 1 min.
脆性是一个重要的质量参数，是木炭在移动时产生细粒的能力。然而，对于木炭床的抗压强度的测定尚无标准。因此，这项工作的目的是评估一些测试参数，以确定在手动液压机中炭粉的产生。木炭采用7年树龄的桉树原木，直径10 ~ 12 cm，长1 m，在圆形表面窑中烧制，最高炭化温度400℃，总时间58小时。为了进行方法学评估，在手动液压机中进行了木炭机械测试，使用四个木炭粒度范围(12.7至19.5;19.5 - 25.4;25.4 ~ 31.7 mm和31.7 ~ 50.8 mm)和5种压缩载荷(1;1.5;2;3和5 t)。参考是滚筒试验。使用手动液压机评估机械强度的方法适用于确定木炭床的强度，因为它代表了木炭在工业系统中支持的努力。使用手动液压机测定木炭机械强度的试验参数建议为:压缩负荷为1吨;粒度为19.5至50.8毫米的木炭;平均施力速度为1 mm s -1;木炭在压力下的时间等于1分钟。
{"title":"Parameters to determine mechanical strength of charcoal in a hydraulic press","authors":"J. D. Soares, M. O. Paula, A. Carneiro, L. J. Costa, A.C. Oliveira, B. Pereira","doi":"10.5039/agraria.v16i4a9096","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a9096","url":null,"abstract":": The friability, an important quality parameter, is the ability of charcoal to generate fines when it is moved. However, there is no standard for determining the compressive strength of charcoal beds. Thus, the objective of this work was to evaluate some test parameters for determining the generation of charcoal fines in a manual hydraulic press. Charcoal was produced with eucalyptus logs 7 years old, diameters of 10 to 12 cm, and length of 1 m in a circular surface kiln, with a maximum carbonization temperature of 400 ºC and a total time of 58 hours. For methodology evaluation, charcoal mechanical tests were performed in a manual hydraulic press, using as test variables four charcoal granulometric ranges (12.7 to 19.5; 19.5 to 25.4; 25.4 to 31.7 and 31.7 to 50.8 mm) and five compressive loads (1; 1.5; 2; 3 and 5 t). The reference was the drum test. The method of evaluating the mechanical strength using a manual hydraulic press is suitable for determining the strength of a charcoal bed, because it represents the efforts that charcoal supports in industrial systems. The test parameters recommended for determining the mechanical strength of charcoal, using a manual hydraulic press, are: compressive load of one ton; charcoal with granulometry of 19.5 to 50.8 mm; average velocity of force application of 1 mm s -1 ; and, charcoal time under pressure equal to 1 min.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83128701","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 : 2021-12-07DOI: 10.5039/agraria.v16i4a9056
K. Paula, J. K. Valentim, Srf Pinheiro, D. Castiblanco, A. Santos, G. Dallago, D. A. Miranda, F. Dalólio
: The objective of this study was to evaluate the effects of inoculation in egg with sources of conjugated linoleic acid (CLA) and lauric acid (LA) on hatchability, zootechnical performance and carcass characteristics of quails from one to 35 days of age. On the 7 th day of incubation, the eggs were inoculated with 0.05 mL of the supplement according to the treatments, CLA and LA. After birth, the birds were housed in cages until 35 days. A completely randomized design was used, with six treatments and six replicates of 10 birds per cage. The inoculations in eggs with CLA and LA did not interfere in the performance and carcass characteristics of quails at 21 and 35 days of age. However, may be associated with a decrease in egg hatchability. The highest absolute weight of the gizzard was observed at 35 days, from birds inoculated in egg with CLA 240 mg and LA 60 mg in the incubation phase, in comparison to the other treatments. In conclusion, the reduction in hatchability makes it impossible to recommend the use of conjugated linoleic acid and lauric acid - in ovo .
{"title":"Egg inoculation of conjugated linoleic acid and lauric acid in meat quails","authors":"K. Paula, J. K. Valentim, Srf Pinheiro, D. Castiblanco, A. Santos, G. Dallago, D. A. Miranda, F. Dalólio","doi":"10.5039/agraria.v16i4a9056","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a9056","url":null,"abstract":": The objective of this study was to evaluate the effects of inoculation in egg with sources of conjugated linoleic acid (CLA) and lauric acid (LA) on hatchability, zootechnical performance and carcass characteristics of quails from one to 35 days of age. On the 7 th day of incubation, the eggs were inoculated with 0.05 mL of the supplement according to the treatments, CLA and LA. After birth, the birds were housed in cages until 35 days. A completely randomized design was used, with six treatments and six replicates of 10 birds per cage. The inoculations in eggs with CLA and LA did not interfere in the performance and carcass characteristics of quails at 21 and 35 days of age. However, may be associated with a decrease in egg hatchability. The highest absolute weight of the gizzard was observed at 35 days, from birds inoculated in egg with CLA 240 mg and LA 60 mg in the incubation phase, in comparison to the other treatments. In conclusion, the reduction in hatchability makes it impossible to recommend the use of conjugated linoleic acid and lauric acid - in ovo .","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"172 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84518850","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 : 2021-12-02DOI: 10.5039/agraria.v16i4a838
C. C. Rezende, A. S. Nascente, M.A. Silva, L. Frasca, R. Pires, M. Filippi, A. C. Lanna, J. Silva
: Multifunctional microorganisms (MM) are able of colonizing root system and shoots and then, provide beneficial effects to the plants. Thus, the objective of this study was test whether multifunctional microorganisms affect gas exchange, macronutrient content, yield components and bean grain yield. A completely randomized design with twenty-six treatments and three replications was used under controlled conditions. Treatments consisted of the application of MM and its combinations in pairs, with nine rhizobacteria isolates BRM 32109, BRM 32110 and 1301 ( Bacillus sp.), BRM 32111 and BRM 32112 ( Pseudomonas sp.), BRM 32113 ( Burkholderia sp.), BRM 32114 ( Serratia sp.), 1381 ( Azospirillum sp.) and Ab-V5 ( Azospirillum brasiliense ), an edaphic fungal isolate T-26 ( Trichoderma koningiopsis ), and a control (without MM). The isolates Ab-V5 and BRM 32112, in addition to the combinations BRM 32114 + T-26, 1301 + BRM 32110 and BRM 32114 + BRM 32110 were the highlights treatments, since they provided increases in gas exchange, in the content of macronutrients and in the agronomic performance.
{"title":"Physiological and agronomic performance of common bean treated with multifunctional microorganisms","authors":"C. C. Rezende, A. S. Nascente, M.A. Silva, L. Frasca, R. Pires, M. Filippi, A. C. Lanna, J. Silva","doi":"10.5039/agraria.v16i4a838","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a838","url":null,"abstract":": Multifunctional microorganisms (MM) are able of colonizing root system and shoots and then, provide beneficial effects to the plants. Thus, the objective of this study was test whether multifunctional microorganisms affect gas exchange, macronutrient content, yield components and bean grain yield. A completely randomized design with twenty-six treatments and three replications was used under controlled conditions. Treatments consisted of the application of MM and its combinations in pairs, with nine rhizobacteria isolates BRM 32109, BRM 32110 and 1301 ( Bacillus sp.), BRM 32111 and BRM 32112 ( Pseudomonas sp.), BRM 32113 ( Burkholderia sp.), BRM 32114 ( Serratia sp.), 1381 ( Azospirillum sp.) and Ab-V5 ( Azospirillum brasiliense ), an edaphic fungal isolate T-26 ( Trichoderma koningiopsis ), and a control (without MM). The isolates Ab-V5 and BRM 32112, in addition to the combinations BRM 32114 + T-26, 1301 + BRM 32110 and BRM 32114 + BRM 32110 were the highlights treatments, since they provided increases in gas exchange, in the content of macronutrients and in the agronomic performance.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"345 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76571632","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 : 2021-11-29DOI: 10.5039/agraria.v16i4a8639
M. Silva, K. Borges, P. A. Barroso, A. M. Medeiros, S. Silva
: Artificial hybridization in Phaseolus lunatus L. is still little used in genetic improvement programs in Brazil due to the low establishment percentages. This work aimed to evaluate pollen viability and stigma receptivity in different Lima bean genotypes throughout the day. Accessions ‘Roxinha -MT’ and ‘Cana Longa-PB’ were used in the experiment. Five flower buds were collected from each genotype at 6:00 a.m., 10:00 a.m., 2:00 p.m., and 6:00 p.m. The stigma receptivity was determined using 3% hydrogen peroxide, whereas pollen viability was determined with 2% acetocarmine colouration. The genotype and time factors acted independently on the percentage of viable and non-viable pollen grains and stigma receptivity. The genotype ‘Roxinha’ presented 88.54% viable pollen grains, a value 84.27% higher than that of the ‘Cana Longa’ genotype. This percentage varied as a function of time, with the highest means observed at 6:00 a.m. Stigma receptivity was influenced only by the time of the day, undergoing a great reduction in receptivity, from 88% in the early morning to slightly more than 40% around noon. These results indicate that 6:00 a.m. is the most suitable time to perform artificial crosses in Lima bean plants .
{"title":"Viability and receptivity of reproductive structures in Lima bean (Phaseolus lunatus L.) for improvement programs","authors":"M. Silva, K. Borges, P. A. Barroso, A. M. Medeiros, S. Silva","doi":"10.5039/agraria.v16i4a8639","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a8639","url":null,"abstract":": Artificial hybridization in Phaseolus lunatus L. is still little used in genetic improvement programs in Brazil due to the low establishment percentages. This work aimed to evaluate pollen viability and stigma receptivity in different Lima bean genotypes throughout the day. Accessions ‘Roxinha -MT’ and ‘Cana Longa-PB’ were used in the experiment. Five flower buds were collected from each genotype at 6:00 a.m., 10:00 a.m., 2:00 p.m., and 6:00 p.m. The stigma receptivity was determined using 3% hydrogen peroxide, whereas pollen viability was determined with 2% acetocarmine colouration. The genotype and time factors acted independently on the percentage of viable and non-viable pollen grains and stigma receptivity. The genotype ‘Roxinha’ presented 88.54% viable pollen grains, a value 84.27% higher than that of the ‘Cana Longa’ genotype. This percentage varied as a function of time, with the highest means observed at 6:00 a.m. Stigma receptivity was influenced only by the time of the day, undergoing a great reduction in receptivity, from 88% in the early morning to slightly more than 40% around noon. These results indicate that 6:00 a.m. is the most suitable time to perform artificial crosses in Lima bean plants .","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88888436","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 : 2021-11-29DOI: 10.5039/agraria.v16i4a92
Lekson Rodrigues Santos, G. B. Lyra, A. L. Carvalho, J. Bressiani, G. Lyra, I. D. Magalhães, J. L. Souza, Iêdo Teodoro
Energy cane is a sugarcane variety obtained through genetic improvement and it has higher biomass production, essential for energy generation. Mathematical models for crop forecasts are excellent tools to support crops and can assist in the establishment of energy cane in different environments and in climate change scenarios. The objective of this work was to evaluate the impacts of climate change on energy cane yield simulated by the DSSAT/CANEGRO model in Alagoas, Northeast of Brazil. We used meteorological, crop and soil data from a field experiment conducted in Teotônio Vilela/AL in 2016 and 2017. The energy cane variety used was Vertix 2, cultivated in a plant cane cycle, with planting date on February 4, 2016, and harvesting date on January 31, 2017. Climate projections (2017-2060) were used based on RCPs (2.6, 4.5, 6.0 and 8.5). The model showed high precision and accuracy in simulations with values of 0.98 and 0.94 for fresh matter and 0.99 and 0.88 for dry matter, for d and r indices, respectively. In the RCP8.5 scenario, the yield reduction may be up to 15% (fresh matter) and 13.5% (dry matter) by 2060.
{"title":"Energy cane yield simulated by the DSSAT/CANEGRO model using climate scenarios in Teotônio Vilela, AL, Brazil","authors":"Lekson Rodrigues Santos, G. B. Lyra, A. L. Carvalho, J. Bressiani, G. Lyra, I. D. Magalhães, J. L. Souza, Iêdo Teodoro","doi":"10.5039/agraria.v16i4a92","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a92","url":null,"abstract":"Energy cane is a sugarcane variety obtained through genetic improvement and it has higher biomass production, essential for energy generation. Mathematical models for crop forecasts are excellent tools to support crops and can assist in the establishment of energy cane in different environments and in climate change scenarios. The objective of this work was to evaluate the impacts of climate change on energy cane yield simulated by the DSSAT/CANEGRO model in Alagoas, Northeast of Brazil. We used meteorological, crop and soil data from a field experiment conducted in Teotônio Vilela/AL in 2016 and 2017. The energy cane variety used was Vertix 2, cultivated in a plant cane cycle, with planting date on February 4, 2016, and harvesting date on January 31, 2017. Climate projections (2017-2060) were used based on RCPs (2.6, 4.5, 6.0 and 8.5). The model showed high precision and accuracy in simulations with values of 0.98 and 0.94 for fresh matter and 0.99 and 0.88 for dry matter, for d and r indices, respectively. In the RCP8.5 scenario, the yield reduction may be up to 15% (fresh matter) and 13.5% (dry matter) by 2060.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"124 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89432322","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 : 2021-11-29DOI: 10.5039/agraria.v16i4a8967
F. M. Barbosa, M. M. Araújo, S. C. Aimi, V. S. Fantinel, M. Muniz, A. Griebeler, F. Turchetto, E. Gasparin
Many native woody species in Brazil still lack of seed technology studies. Myracrodruon balansae (Anacardiaceae) is a commercially endangered species with few studies. Thus, the objective of this study was to determine the influence of different substrates on germination and to evaluate the appropriate environment for storage and fungi associated with M. balansae diaspores. Two experiments were performed to choose the suitable substrate for germination tests: on top of sieved sand, between two layers of sieved sand, on top of vermiculite, between two layers of vermiculite, on top of blotter paper, between blotter paper, into paper rolls, and to evaluate their storage potential, and the associated fungi in three environmental conditions: wet cold chamber, refrigerator, and room temperature, for 18 months. Based on the results, germination tests can be performed on the substrates: on top of sieved sand, on top of vermiculite, between two layers of vermiculite, and on top of blotter paper. The diaspores could be stored with a water content of 10%, in a refrigerator at 3 °C, and 48% of relative humidity for 18 months, with only 18% of germination capacity loss. The main genera of fungi associated with stored seeds were Alternaria, Aspergillus, and Penicillium.
{"title":"Germination, sanity, and store of Myracrodruon balansae diaspores","authors":"F. M. Barbosa, M. M. Araújo, S. C. Aimi, V. S. Fantinel, M. Muniz, A. Griebeler, F. Turchetto, E. Gasparin","doi":"10.5039/agraria.v16i4a8967","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a8967","url":null,"abstract":"Many native woody species in Brazil still lack of seed technology studies. Myracrodruon balansae (Anacardiaceae) is a commercially endangered species with few studies. Thus, the objective of this study was to determine the influence of different substrates on germination and to evaluate the appropriate environment for storage and fungi associated with M. balansae diaspores. Two experiments were performed to choose the suitable substrate for germination tests: on top of sieved sand, between two layers of sieved sand, on top of vermiculite, between two layers of vermiculite, on top of blotter paper, between blotter paper, into paper rolls, and to evaluate their storage potential, and the associated fungi in three environmental conditions: wet cold chamber, refrigerator, and room temperature, for 18 months. Based on the results, germination tests can be performed on the substrates: on top of sieved sand, on top of vermiculite, between two layers of vermiculite, and on top of blotter paper. The diaspores could be stored with a water content of 10%, in a refrigerator at 3 °C, and 48% of relative humidity for 18 months, with only 18% of germination capacity loss. The main genera of fungi associated with stored seeds were Alternaria, Aspergillus, and Penicillium.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81335971","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 : 2021-11-27DOI: 10.5039/agraria.v16i4a8718
J. E. Simon, E. S. Silva, R. Medeiros, A. Lima, E. G. Fidelis, R. O. Silva, A. B. Bendahan, D. Schurt
: The objective of this study is to evaluate the biological development of the chinch bug, Blissus pulchellus regarding the resistance of the eight forage poaceae. For that, chinch bugs collected from a pasture area, in Boa Vista, Roraima, Brazil, were taken to the Embrapa Roraima Entomology Laboratory for evaluation. The mass breeding of B. pulchellus was carried out in B.O.D., on Urochloa ruziziensis and the biological development evaluation was carried out on eight forage poaceae: Urochloa ruziziensis , U. humidicola , U. brizantha cv. Marandú, U. brizantha cv. Piatã, U. brizantha cv. Paiaguás, Panicum maximum cv. Mombaça, P. maximum cv. Zuri and Andropogon gayanus . The results obtained allowed us to conclude that: a) A. gayanus , P. maximum cv. Zuri and U. humidicola , negatively affect the biology of B. pulchellus ; b) A. gayanus , P. maximum cv. Zuri present high and moderate resistance U. humidicola , of the type antibiosis to B. pulchellus and c) Urochloa ruziziensis , U. brizantha cv. Paiaguás and U. brizantha cv. Piatã, have high grade and P. maximum cv. Mombasa and U. brizantha cv. Marandú, less susceptibility to B. pulchellus .
摘要:本研究的目的是对八种牧草禾本科植物的抗性进行评价。为此，从巴西罗赖马州博阿维斯塔(Boa Vista)的一个牧场收集的chinch bugs被带到Embrapa Roraima昆虫学实验室进行评估。进行大规模繁殖b pulchellus B.O.D。,在Urochloa ruziziensis和生物发展进行评价八饲料禾本科:Urochloa ruziziensis, humidicola,美国brizantha简历。Marandú， U. brizantha cv。Piatã， U. brizantha cv。Paiaguás, Panicum最大cv。mombaa, P. maximum cv。祖利和雌雄同体。所得结果使我们得出结论:a) a . gayanus, P. maximum cv。Zuri和U. humidicola对白斑小蠊的生物学特性有负面影响;b) A. gayanus, P. maximum cv。Zuri对水蛭(B. pulchellus和c . Urochloa ruziziensis, U. brizantha cv)呈高、中抗性。Paiaguás和U. brizantha cv。Piatã，具有高等级和p最大值cv。蒙巴萨和美国布里赞塔cv。Marandú，对白斑芽孢杆菌的易感性较低。
{"title":"Biological aspects of Blissus pulchellus Montadon (Hemiptera: Blissidae) regarding the resistance of forage poaceae","authors":"J. E. Simon, E. S. Silva, R. Medeiros, A. Lima, E. G. Fidelis, R. O. Silva, A. B. Bendahan, D. Schurt","doi":"10.5039/agraria.v16i4a8718","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a8718","url":null,"abstract":": The objective of this study is to evaluate the biological development of the chinch bug, Blissus pulchellus regarding the resistance of the eight forage poaceae. For that, chinch bugs collected from a pasture area, in Boa Vista, Roraima, Brazil, were taken to the Embrapa Roraima Entomology Laboratory for evaluation. The mass breeding of B. pulchellus was carried out in B.O.D., on Urochloa ruziziensis and the biological development evaluation was carried out on eight forage poaceae: Urochloa ruziziensis , U. humidicola , U. brizantha cv. Marandú, U. brizantha cv. Piatã, U. brizantha cv. Paiaguás, Panicum maximum cv. Mombaça, P. maximum cv. Zuri and Andropogon gayanus . The results obtained allowed us to conclude that: a) A. gayanus , P. maximum cv. Zuri and U. humidicola , negatively affect the biology of B. pulchellus ; b) A. gayanus , P. maximum cv. Zuri present high and moderate resistance U. humidicola , of the type antibiosis to B. pulchellus and c) Urochloa ruziziensis , U. brizantha cv. Paiaguás and U. brizantha cv. Piatã, have high grade and P. maximum cv. Mombasa and U. brizantha cv. Marandú, less susceptibility to B. pulchellus .","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74902806","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 : 2021-11-26DOI: 10.5039/agraria.v16i4a9004
A. C. Pereira, M. X. Peiter, M.A. Rodrigues, A. D. Robaina, J. D. Piroli, L. Ferreira, J. H. Kirchner, W. Mezzomo
Chrysanthemum is one of the most commercialized flower species in Brazil, however, there is little information related to the correct water management of the crop. Thus, the work seeks to determine the crop evapotranspiration (ETc) and obtain the cultural coefficients (Kc) of the pot chrysanthemum, in addition to assessing the water use efficiency (EUA) of the crop under different irrigation managements. The experiment was conducted in a protected environment in Santa MariaRS, which a completely randomized design (DIC) was used, with five treatments based on the capacity of water retention in the vessel (CRV) (40, 60, 80, 100 and 120% CRV), with 16 repetitions, each pot was considered one repetition. ETc was determined by weighing Lysymetry, ETo was calculated by six different equations: Benevides-Lopez, Camargo, Linacre, Jensen-Haise, Hargreaves and Ivanov. Kc was obtained by the relationship between ETc and ETo. The evapotranspiration of the culture ranged between 153 and 264 mm. There was no significant difference in the EUA between the treatments studied. The average Kc was 0.98 for the vegetative phase, 1.29 from the beginning of the reproductive phase to the point of commercialization and 0.85 until the end of the reproductive phase.
{"title":"Water management and crop coefficients for pot chrysanthemum","authors":"A. C. Pereira, M. X. Peiter, M.A. Rodrigues, A. D. Robaina, J. D. Piroli, L. Ferreira, J. H. Kirchner, W. Mezzomo","doi":"10.5039/agraria.v16i4a9004","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a9004","url":null,"abstract":"Chrysanthemum is one of the most commercialized flower species in Brazil, however, there is little information related to the correct water management of the crop. Thus, the work seeks to determine the crop evapotranspiration (ETc) and obtain the cultural coefficients (Kc) of the pot chrysanthemum, in addition to assessing the water use efficiency (EUA) of the crop under different irrigation managements. The experiment was conducted in a protected environment in Santa MariaRS, which a completely randomized design (DIC) was used, with five treatments based on the capacity of water retention in the vessel (CRV) (40, 60, 80, 100 and 120% CRV), with 16 repetitions, each pot was considered one repetition. ETc was determined by weighing Lysymetry, ETo was calculated by six different equations: Benevides-Lopez, Camargo, Linacre, Jensen-Haise, Hargreaves and Ivanov. Kc was obtained by the relationship between ETc and ETo. The evapotranspiration of the culture ranged between 153 and 264 mm. There was no significant difference in the EUA between the treatments studied. The average Kc was 0.98 for the vegetative phase, 1.29 from the beginning of the reproductive phase to the point of commercialization and 0.85 until the end of the reproductive phase.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"194 1‐6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91435537","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 : 2021-11-26DOI: 10.5039/agraria.v16i4a623
S. A. Amorim, A. Lima, Í. Cavalcante, J. C. Cunha, João Carlos Ferreira de Melo Júnior, K. A. Silva, M. Rodrigues, D. N. Dias
There is a lack of agronomic research on the production of custard apple seedlings, especially regarding the ideal substrate and nutritional requirement of the plants. In order to evaluate the accumulation of nutrients in shoots and roots, leaf chlorophyll index and absorption efficiency index (AEI) in custard apple seedlings grown in different substrates and under doses of slow-release fertilizer, an experiment was set in randomized blocks in split-plot scheme with four replicates and eleven plants per plot. The custard apple seedling production method was by sowing. Plots were represented by substrates (fresh sugarcane bagasse; enriched sugarcane bagasse; coconut powder, and commercial organic substrate), whereas subplots were represented by Osmocote Plus® fertilizer doses (0; 3; 6; 9; 12 and 15 kg m-3). The final evaluation was performed at 105 days after sowing. The effect of the slow-release fertilizer on the formation of custard apple seedlings was influenced by the substrate. There was greater accumulation of nutrients as the availability of nutrients increases, as well as increase in nutrient AEI. Custard apple seedlings were found to be more efficient to absorb N > Mg > K > Ca > P > Fe > Mn > Zn. As substrate, coconut powder associated with the 9 kg m-3 slow-release fertilizer dose is recommended to produce custard apple seedlings.
目前，关于蛋奶苹果育苗的农艺研究还很缺乏，特别是关于理想基质和植株营养需求的研究。为评价不同基质和不同剂量缓释肥处理下乳苹果幼苗根系和茎部养分积累、叶片叶绿素指数和吸收效率指数(AEI)的变化，采用4个重复、11株/块的随机分组试验。采用播种育苗的方法育苗。样地以底物(新鲜甘蔗渣;浓缩甘蔗渣;椰子粉和商业有机基质)，而亚图由Osmocote Plus®肥料剂量(0;3;6;9;12和15 kg m-3)。最终评价在播种后105天进行。缓释肥对苹果幼苗形成的影响受基质的影响。随着养分可利用性的增加和养分AEI的增加，养分的积累也随之增加。结果表明，乳苹果幼苗对N > Mg > K > Ca > P > Fe > Mn > Zn的吸收效率较高。建议用椰子粉作为基质，配以9 kg m-3缓释肥量生产蛋奶苹果苗木。
{"title":"Organic substrates and slow-realease fertilizing on nutrient accumulation and absorption efficiency of custard apple seedlings","authors":"S. A. Amorim, A. Lima, Í. Cavalcante, J. C. Cunha, João Carlos Ferreira de Melo Júnior, K. A. Silva, M. Rodrigues, D. N. Dias","doi":"10.5039/agraria.v16i4a623","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a623","url":null,"abstract":"There is a lack of agronomic research on the production of custard apple seedlings, especially regarding the ideal substrate and nutritional requirement of the plants. In order to evaluate the accumulation of nutrients in shoots and roots, leaf chlorophyll index and absorption efficiency index (AEI) in custard apple seedlings grown in different substrates and under doses of slow-release fertilizer, an experiment was set in randomized blocks in split-plot scheme with four replicates and eleven plants per plot. The custard apple seedling production method was by sowing. Plots were represented by substrates (fresh sugarcane bagasse; enriched sugarcane bagasse; coconut powder, and commercial organic substrate), whereas subplots were represented by Osmocote Plus® fertilizer doses (0; 3; 6; 9; 12 and 15 kg m-3). The final evaluation was performed at 105 days after sowing. The effect of the slow-release fertilizer on the formation of custard apple seedlings was influenced by the substrate. There was greater accumulation of nutrients as the availability of nutrients increases, as well as increase in nutrient AEI. Custard apple seedlings were found to be more efficient to absorb N > Mg > K > Ca > P > Fe > Mn > Zn. As substrate, coconut powder associated with the 9 kg m-3 slow-release fertilizer dose is recommended to produce custard apple seedlings.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73325699","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 : 2021-11-26DOI: 10.5039/agraria.v16i4a1171
A. F. C. Júnior, L. F. B. Chagas, Albert Lennon Lima Martins, B. S. O. Colonia, Rodrigo Silva de Oliveira
The purpose of this study was to evaluate the efficiency of the product containing Trichoderma asperellum 201 in soybean field productivity in different regions of the Brazilian Cerrado. Thirty-five experiments were conducted in the states of Bahia and Tocantins, in different municipalities, in the 2017/2018, 2018/2019 and 2019/2020 seasons. The treatments used were the seed treatment with T. asperellum and a control (without inoculation of Trichoderma). The seeds were inoculated (TS) with product containing T. asperellum, at a dose of 5 g per kg of seeds, formulated with a minimum concentration of 2 x 108 CFU g-1, with graphite as an inert material in the formulation. In all fields in the states of Bahia and Tocantins, positive effects (p < 0.05) of inoculation of the T. asperellum were observed in the productivity of different soybean cultivars. In the Bahia state fields, productivity gains varied between seasons, with an average productivity gain of 8.01% seen for the 2017/2018 crop, 3.97% for the 2018/2019 crop, and 9.23% for the 2019/2020 crop. In Tocantins, the average productivity, considering all experiments, was 13.02%.
{"title":"Soybean productivity with Trichoderma asperellum seed treatment in different regions of the Brazilian Cerrado","authors":"A. F. C. Júnior, L. F. B. Chagas, Albert Lennon Lima Martins, B. S. O. Colonia, Rodrigo Silva de Oliveira","doi":"10.5039/agraria.v16i4a1171","DOIUrl":"https://doi.org/10.5039/agraria.v16i4a1171","url":null,"abstract":"The purpose of this study was to evaluate the efficiency of the product containing Trichoderma asperellum 201 in soybean field productivity in different regions of the Brazilian Cerrado. Thirty-five experiments were conducted in the states of Bahia and Tocantins, in different municipalities, in the 2017/2018, 2018/2019 and 2019/2020 seasons. The treatments used were the seed treatment with T. asperellum and a control (without inoculation of Trichoderma). The seeds were inoculated (TS) with product containing T. asperellum, at a dose of 5 g per kg of seeds, formulated with a minimum concentration of 2 x 108 CFU g-1, with graphite as an inert material in the formulation. In all fields in the states of Bahia and Tocantins, positive effects (p < 0.05) of inoculation of the T. asperellum were observed in the productivity of different soybean cultivars. In the Bahia state fields, productivity gains varied between seasons, with an average productivity gain of 8.01% seen for the 2017/2018 crop, 3.97% for the 2018/2019 crop, and 9.23% for the 2019/2020 crop. In Tocantins, the average productivity, considering all experiments, was 13.02%.","PeriodicalId":21187,"journal":{"name":"Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74383605","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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