Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P597-603
H. Semnaninejad, G. Nourmohammadi, V. Rameeh, A. Cherati
HIGHLIGHTS: The results showed that with certain genotypes, different criteria should be considered for grain yield improvement in different conditions. The highest grain yield was obtained for 350 and 400 (seeds per m2) across all planting dates and genotypes. The delay in planting reduced most traits expected protein concentration and gluten index.
{"title":"Correlation and path coefficient analyses of phenological traits, yield components and quality traits in wheat","authors":"H. Semnaninejad, G. Nourmohammadi, V. Rameeh, A. Cherati","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P597-603","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P597-603","url":null,"abstract":"HIGHLIGHTS: The results showed that with certain genotypes, different criteria should be considered for grain yield improvement in different conditions. The highest grain yield was obtained for 350 and 400 (seeds per m2) across all planting dates and genotypes. The delay in planting reduced most traits expected protein concentration and gluten index.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"37 1","pages":"597-603"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81477381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P591-596
T. Dang
HIGHLIGHTS: Crop yield areas expected to decline under the adverse effects of climate factors. Applying suitable cultivation periods (SCPs) may help improve crop yields. SCPs create higher potential grain yields compared to the baseline.
{"title":"Grain yield optimisation in the Plain of Reeds in the context of climate variability","authors":"T. Dang","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P591-596","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P591-596","url":null,"abstract":"HIGHLIGHTS: Crop yield areas expected to decline under the adverse effects of climate factors. Applying suitable cultivation periods (SCPs) may help improve crop yields. SCPs create higher potential grain yields compared to the baseline.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"7 1","pages":"591-596"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72880859","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-30DOI: 10.1590/1807-1929/AGRIAMBI.V25N9P604-611
Vandeilson Belfort Moura, V. Farias, H. Nunes, D. P. Sousa, D. Ferreira, P. Souza
HIGHLIGHTS: For the cowpea cultivar BR3-Tracuateua, the phenological stage with the greatest water demand was the flowering stage. The flowering phenological stage showed the highest sensitivity to water deficit, with a response factor of dry biomass of 2.03. Cowpea BR3-Tracuateua showed high sensitivity to water deficit, with a Ky of 1.48.
{"title":"Actual evapotranspiration and response factors of the cowpea in Amazonian edaphoclimatic conditions","authors":"Vandeilson Belfort Moura, V. Farias, H. Nunes, D. P. Sousa, D. Ferreira, P. Souza","doi":"10.1590/1807-1929/AGRIAMBI.V25N9P604-611","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N9P604-611","url":null,"abstract":"HIGHLIGHTS: For the cowpea cultivar BR3-Tracuateua, the phenological stage with the greatest water demand was the flowering stage. The flowering phenological stage showed the highest sensitivity to water deficit, with a response factor of dry biomass of 2.03. Cowpea BR3-Tracuateua showed high sensitivity to water deficit, with a Ky of 1.48.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"7 1","pages":"604-611"},"PeriodicalIF":1.2,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85109517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P386-392
Sulamirtes S. de A. Magalhães, O. L. S. Weber
HIGHLIGHTS Higher concentrations of exchangeable Zn were found in areas with pig slurry application. No higher concentrations of Cu were found in the exchangeable fraction in areas using pig slurry. In all study areas, it was observed that more than 70% of Cu is in recalcitrant forms.
{"title":"Zinc and copper fractions in Oxisols of different textures fertilized with pig slurry","authors":"Sulamirtes S. de A. Magalhães, O. L. S. Weber","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P386-392","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P386-392","url":null,"abstract":"HIGHLIGHTS Higher concentrations of exchangeable Zn were found in areas with pig slurry application. No higher concentrations of Cu were found in the exchangeable fraction in areas using pig slurry. In all study areas, it was observed that more than 70% of Cu is in recalcitrant forms.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"14 1","pages":"386-392"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86972514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P361-371
K. P. Bexaira, N. Streck, A. Zanon, E. L. Tagliapietra, G. L. Richter, Patrick Weber
HIGHLIGHTS Improvement of the simulation by calculating a temperature function with the daily minimum and maximum temperatures. Equation to determine the maximum rate of node appearance of soybean cultivars recommended for Southern Brazil. Maximum node appearance rate varies with the maturity group and not with the type of growth of soybean cultivars.
{"title":"Calibration and validation of a node appearance model in soybean crop","authors":"K. P. Bexaira, N. Streck, A. Zanon, E. L. Tagliapietra, G. L. Richter, Patrick Weber","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P361-371","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P361-371","url":null,"abstract":"HIGHLIGHTS Improvement of the simulation by calculating a temperature function with the daily minimum and maximum temperatures. Equation to determine the maximum rate of node appearance of soybean cultivars recommended for Southern Brazil. Maximum node appearance rate varies with the maturity group and not with the type of growth of soybean cultivars.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"65 1","pages":"361-371"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74098816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P409-414
Tainá A. da Silva, M. Brito, Ivens H. da Conceição, Ericlis D. S. Nunes, D. S. Souza, G. Martins
The objective was to study the chlorophyll ‘a’ fluorescence and the photochemical quenching from ‘Tahiti’ acid lime grafted in new citrus genotypes under irrigation with three types of water during prefloration phase of the first year of cultivation, purposing to verify if the chlorophyll ‘a’ fluorescence and the photochemical quenching are indicatives of the beginning of ionic stress. An experiment was set up with three irrigation water salinity levels (0.14, 2.40 and 4.80 dS m-1), and 13 citrus rootstock, corresponding to ‘Rangpur Santa Cruz’ lime, three Citrandarins, the ‘Sunki Tropical’ mandarin and eight citrus hybrids, all grafted with the ‘Tahiti’ acid lime, using randomized block design with four replications. At 70 days after transplanting, the chlorophyll a fluorescence of the plants were evaluated. Photochemical quenching indicates begin of ionic saline stress in citrus plants; The ‘Tahiti’ acid lime grafted on TSKC x (LCR x TR) 059, ‘Rangpur Santa Cruz’ lime, the Citrandarins ‘Riverside’ and ‘San Diego’ and TSKC x TRBK 007 genotypes has greater activation of protective mechanisms through transient fluorescence.
本研究旨在研究“塔希提”酸石灰嫁接柑橘新基因型在栽培第一年开花前期三种水灌溉条件下的叶绿素a荧光和光化学猝灭，以验证叶绿素a荧光和光化学猝灭是否为离子胁迫开始的标志。试验采用随机区组设计，采用4个重复，3个灌溉水盐度水平(0.14、2.40和4.80 dS m-1)， 13根柑橘砧木，分别对应“Rangpur Santa Cruz”石灰、“Citrandarins”、“Sunki Tropical”柑橘和8个柑橘杂交种，均嫁接“Tahiti”酸石灰。移栽后70 d，测定植株的叶绿素a荧光。光化学猝灭标志着柑桔离子盐胁迫开始;嫁接在TSKC x (LCR x TR) 059上的‘塔希提’酸石灰、‘Rangpur Santa Cruz’酸石灰、柑橘素‘Riverside’和‘San Diego’以及TSKC x TRBK 007基因型上的‘Tahiti’酸石灰通过瞬态荧光激活了更大的保护机制。
{"title":"Phothochemical quenching is indicative of ionic stress on ‘Tahiti’ acid lime grafted on citrus genotypes","authors":"Tainá A. da Silva, M. Brito, Ivens H. da Conceição, Ericlis D. S. Nunes, D. S. Souza, G. Martins","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P409-414","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P409-414","url":null,"abstract":"The objective was to study the chlorophyll ‘a’ fluorescence and the photochemical quenching from ‘Tahiti’ acid lime grafted in new citrus genotypes under irrigation with three types of water during prefloration phase of the first year of cultivation, purposing to verify if the chlorophyll ‘a’ fluorescence and the photochemical quenching are indicatives of the beginning of ionic stress. An experiment was set up with three irrigation water salinity levels (0.14, 2.40 and 4.80 dS m-1), and 13 citrus rootstock, corresponding to ‘Rangpur Santa Cruz’ lime, three Citrandarins, the ‘Sunki Tropical’ mandarin and eight citrus hybrids, all grafted with the ‘Tahiti’ acid lime, using randomized block design with four replications. At 70 days after transplanting, the chlorophyll a fluorescence of the plants were evaluated. Photochemical quenching indicates begin of ionic saline stress in citrus plants; The ‘Tahiti’ acid lime grafted on TSKC x (LCR x TR) 059, ‘Rangpur Santa Cruz’ lime, the Citrandarins ‘Riverside’ and ‘San Diego’ and TSKC x TRBK 007 genotypes has greater activation of protective mechanisms through transient fluorescence.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"8 1","pages":"409-414"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90586290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P393-401
G. S. Lima, Maria G. da S. Soares, L. A. A. Soares, H. Gheyi, F. W. A. Pinheiro, Jailson Batista da Silva
The high concentration of salt in the waters of the semi-arid region of Northeast Brazil is a limiting factor for agricultural production in the region. In this context, the objective of this study was to evaluate the percentage of cell membrane damage, contents of photosynthetic pigments and growth of sour passion fruit seedlings, cv. BRS RC, under irrigation with saline water and potassium fertilization. The experiment was conducted in a greenhouse, adopting a randomized block design in a 5 x 2 factorial arrangement, with five values of electrical conductivity of irrigation water (0.3; 1.1; 1.9; 2.7 and 3.5 dS m-1) and two potassium doses KD (50 and 100% of the fertilization recommendation for pot experiments), with two plants per plot, and four replicates. The dose referring to 100% of the recommendation corresponded to 150 mg of K2O kg -1 of soil. Water salinity from 0.3 dS m-1 promoted reduction in the chlorophyll synthesis and growth of seedlings of sour passion fruit cv. BRS RC. Despite the reduction in growth, water with electrical conductivity of up to 3.5 dS m-1 can still be used to form passion fruit seedlings with acceptable quality for the field. Potassium does not attenuate the deleterious effects of salt stress on the formation of seedlings of sour passion fruit cv. BRS RC.
{"title":"Potassium and irrigation water salinity on the formation of sour passion fruit seedlings","authors":"G. S. Lima, Maria G. da S. Soares, L. A. A. Soares, H. Gheyi, F. W. A. Pinheiro, Jailson Batista da Silva","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P393-401","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P393-401","url":null,"abstract":"The high concentration of salt in the waters of the semi-arid region of Northeast Brazil is a limiting factor for agricultural production in the region. In this context, the objective of this study was to evaluate the percentage of cell membrane damage, contents of photosynthetic pigments and growth of sour passion fruit seedlings, cv. BRS RC, under irrigation with saline water and potassium fertilization. The experiment was conducted in a greenhouse, adopting a randomized block design in a 5 x 2 factorial arrangement, with five values of electrical conductivity of irrigation water (0.3; 1.1; 1.9; 2.7 and 3.5 dS m-1) and two potassium doses KD (50 and 100% of the fertilization recommendation for pot experiments), with two plants per plot, and four replicates. The dose referring to 100% of the recommendation corresponded to 150 mg of K2O kg -1 of soil. Water salinity from 0.3 dS m-1 promoted reduction in the chlorophyll synthesis and growth of seedlings of sour passion fruit cv. BRS RC. Despite the reduction in growth, water with electrical conductivity of up to 3.5 dS m-1 can still be used to form passion fruit seedlings with acceptable quality for the field. Potassium does not attenuate the deleterious effects of salt stress on the formation of seedlings of sour passion fruit cv. BRS RC.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"312 1","pages":"393-401"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88078785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P402-408
J. Silva, F. Sá, N. S. Dias, M. Ferreira Neto, G. D. Jales, P. Fernandes
The objective of the study was to evaluate the growth and physiological aspects of the ‘Sugar Baby’ mini watermelon grown in a hydroponic system with different substrates and mixtures of reject brine in the preparation of the nutrient solution. For this purpose, the experiment was carried out in a plastic greenhouse, using a randomized block design, in a 5 x 4 factorial scheme, corresponding to the combination of five mixtures of reject brine (electrical conductivity EC = 9.50 dS m-1) and tap water (EC = 0.54 dS m-1) and four types of substrates (coconut fiber, sand, 70% sand + 30% rice husk and 40% sand + 60% rice husk), distributed in four replicates. Using the mixture of reject brine and tap water with EC above 4.00 dS m-1 to prepare the nutrient solution of mini watermelon plants markedly reduced their growth. Increments in carboxylation efficiency and activity in the electron transport chain act as tolerance mechanisms to compensate for the net photosynthesis of mini watermelon under salt stress. Coconut fiber promoted the best growth and photosynthetic activity for mini watermelon plants, while the substrate with 100% washed sand led to the lowest performance.
{"title":"Morphophysiology of mini watermelon in hydroponic cultivation using reject brine and substrates","authors":"J. Silva, F. Sá, N. S. Dias, M. Ferreira Neto, G. D. Jales, P. Fernandes","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P402-408","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P402-408","url":null,"abstract":"The objective of the study was to evaluate the growth and physiological aspects of the ‘Sugar Baby’ mini watermelon grown in a hydroponic system with different substrates and mixtures of reject brine in the preparation of the nutrient solution. For this purpose, the experiment was carried out in a plastic greenhouse, using a randomized block design, in a 5 x 4 factorial scheme, corresponding to the combination of five mixtures of reject brine (electrical conductivity EC = 9.50 dS m-1) and tap water (EC = 0.54 dS m-1) and four types of substrates (coconut fiber, sand, 70% sand + 30% rice husk and 40% sand + 60% rice husk), distributed in four replicates. Using the mixture of reject brine and tap water with EC above 4.00 dS m-1 to prepare the nutrient solution of mini watermelon plants markedly reduced their growth. Increments in carboxylation efficiency and activity in the electron transport chain act as tolerance mechanisms to compensate for the net photosynthesis of mini watermelon under salt stress. Coconut fiber promoted the best growth and photosynthetic activity for mini watermelon plants, while the substrate with 100% washed sand led to the lowest performance.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"179 1","pages":"402-408"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75794136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P429-435
V. Nunes, R. Silva-Mann, M. C. Vasconcelos, A. Rodrigues, J. L. Souza
HIGHLIGHTS The seeds obtained from the fruit pulp industry have a physiological quality for seedling propagation. There is a high potential for reducing fruit pulp industry residues by using these seeds for propagation. Higher pixel density is observed for full seeds with an efficiency of forming normal seedlings.
{"title":"Physical and physiological quality of mangaba seeds obtained by different processing methods","authors":"V. Nunes, R. Silva-Mann, M. C. Vasconcelos, A. Rodrigues, J. L. Souza","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P429-435","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P429-435","url":null,"abstract":"HIGHLIGHTS The seeds obtained from the fruit pulp industry have a physiological quality for seedling propagation. There is a high potential for reducing fruit pulp industry residues by using these seeds for propagation. Higher pixel density is observed for full seeds with an efficiency of forming normal seedlings.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"123 1","pages":"429-435"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75672297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-06-01DOI: 10.1590/1807-1929/AGRIAMBI.V25N6P422-428
R. Cruz, G. F. Silva, Ê. F. D. F. Silva, H. R. Soares, J. A. Santos Júnior, H. Santos
Studies related to the use of natural brackish waters, water consumption, and flow rates of nutrient solutions applied to cauliflower plants are incipient in Brazil. The objective of this study was to evaluate the water yield and consumption by cauliflower plants grown under the use of brackish waters based on chemical characteristics of waters from wells of the Brazilian semiarid, grown in nutrient film technique (NFT) hydroponic system. A completely randomized design with four replicates was used, in a 6 × 2 factorial arrangement, consisted of six different waters to prepare the nutrient solution and two flow rates. The waters were formulated based on a simulation of brackish waters from wells of different communities of the municipality of Ibimirim, state of Pernambuco, Brazil, which presented electrical conductivities of 1.67, 3.30, 4.71, 5.88, and 13.84 dS m-1, and municipal public water. The flow rates of the nutrient solution used were 1.5 and 2.5 L min-1. The use of brackish waters to prepare the nutrient solutions and refilling the solutions lost by evapotranspiration decreased the water consumption and cauliflower yields, with higher magnitude for the flow rate of 2.5 L min-1. The highest water yield values of the shoot fresh and dry biomasses were found for the calcium chloride water. The best water for the cauliflower production was the calcium sulphate water, and the worse was the S2 magnesium chloride water. The use of all waters is viable for cauliflower production, except the S2 magnesium chloride water; however, the use of the flow rate of 2.5 dS m-1 results in higher decrease in crop yield.
在巴西，有关利用天然微咸水、耗水量和用于花椰菜的营养液流速的研究尚处于起步阶段。本研究的目的是根据巴西半干旱地区营养膜水培系统(NFT)井水的化学特性，评价在微咸水条件下种植花椰菜的产水量和耗水量。采用完全随机设计，4个重复，按6 × 2因子排列，包括6种不同的水配制营养液和2种流速。这些水是基于对巴西伯南布哥州Ibimirim市不同社区水井的微淡水的模拟而配制的，这些井的电导率分别为1.67、3.30、4.71、5.88和13.84 dS - m-1，以及市政公共水。所用营养液的流速分别为1.5和2.5 L min-1。用微咸水配制营养液和补充蒸散损失的营养液降低了菜花的耗水量和产量，且在2.5 L min-1流速下降幅较大。新梢鲜生物量和干生物量产水量以氯化钙水最高。生产花椰菜的最佳水为硫酸钙水，最差水为S2氯化镁水。除S2氯化镁水外，其余水均可用于花椰菜生产;而采用2.5 dS - m-1的流量，作物减产幅度较大。
{"title":"Water yield and consumption of cauliflower plants grown in a hydroponic system using brackish waters and different flow rates","authors":"R. Cruz, G. F. Silva, Ê. F. D. F. Silva, H. R. Soares, J. A. Santos Júnior, H. Santos","doi":"10.1590/1807-1929/AGRIAMBI.V25N6P422-428","DOIUrl":"https://doi.org/10.1590/1807-1929/AGRIAMBI.V25N6P422-428","url":null,"abstract":"Studies related to the use of natural brackish waters, water consumption, and flow rates of nutrient solutions applied to cauliflower plants are incipient in Brazil. The objective of this study was to evaluate the water yield and consumption by cauliflower plants grown under the use of brackish waters based on chemical characteristics of waters from wells of the Brazilian semiarid, grown in nutrient film technique (NFT) hydroponic system. A completely randomized design with four replicates was used, in a 6 × 2 factorial arrangement, consisted of six different waters to prepare the nutrient solution and two flow rates. The waters were formulated based on a simulation of brackish waters from wells of different communities of the municipality of Ibimirim, state of Pernambuco, Brazil, which presented electrical conductivities of 1.67, 3.30, 4.71, 5.88, and 13.84 dS m-1, and municipal public water. The flow rates of the nutrient solution used were 1.5 and 2.5 L min-1. The use of brackish waters to prepare the nutrient solutions and refilling the solutions lost by evapotranspiration decreased the water consumption and cauliflower yields, with higher magnitude for the flow rate of 2.5 L min-1. The highest water yield values of the shoot fresh and dry biomasses were found for the calcium chloride water. The best water for the cauliflower production was the calcium sulphate water, and the worse was the S2 magnesium chloride water. The use of all waters is viable for cauliflower production, except the S2 magnesium chloride water; however, the use of the flow rate of 2.5 dS m-1 results in higher decrease in crop yield.","PeriodicalId":51288,"journal":{"name":"Revista Brasileira de Engenharia Agricola e Ambiental","volume":"16 1","pages":"422-428"},"PeriodicalIF":1.2,"publicationDate":"2021-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89967501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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