Pub Date : 2024-02-01DOI: 10.21475/ajcs.24.18.02.pne3872
Olavo da Costa Leite, J. Luz, S. D. O. Lima, Rubens Ribeiro da Silva, R. R. Fidelis, Carmen Maria Coimbra Manhães, J. Peluzio, Osvaldo José Ferreira Júnior, Mauro Gomes dos Santos, Ismael de Oliveira Pinto, Renisson Neponuceno de Araújo Filho, Allan Deyvid Pereira da Silva, Jader Nunes Cachoeira, G. N. Scheidt
Agricultural expansion is advancing on marginal soils (Plinthic soils), but the liming recommendation for this soil, especially for soybean cultivation, remains unknown. This study aimed to evaluate soybean (Glycine max) responses to limestone doses in concretionary soils (plinthic and/or petroplinthic). The experiment was carried out in the greenhouse, in randomized blocks, with four soil types and six limestone doses (4x6 factorial scheme), with four replicates. Soils were: RYO: Red-Yellow Oxisols; CPP-29, CPP-72, CPP-82 corresponds to the Concretionary Petric Plinthosol with 29, 72, and 82% concretions, respectively. Limestone doses varied from 0 to 4 times for each soil, based on the recommendation of regional bulletins. Soil temperature, crop emergence, development, and soybean yield characteristics were evaluated. Results were evaluated by ANOVA, followed by the LSD test or polynomial regression adjustment (p ≤ 0.05). Soybean response to liming varied with soil types. Seedlings showed lower vigor in Plinthic soils with plinthite contents ≥72%. These soils showed higher thermal accumulation (°C), and this increase showed a strong negative correlation with soybean development and reproductive characteristics. Evidence of liming response was observed after crop stage V5. Limestone substantially improved soybean growth and development in Plinthic soils with high plinthite levels, although they had lower yield potential than low plinthite levels and Oxisol. In general, the maximum response of the crop occurred at doses ~2 times higher than that practiced in the Brazilian Savanna region, especially in Plinthic soils
{"title":"Effect of liming in plinthic and petroplinthic soils for soybean cultivation in the Brazilian Savanna","authors":"Olavo da Costa Leite, J. Luz, S. D. O. Lima, Rubens Ribeiro da Silva, R. R. Fidelis, Carmen Maria Coimbra Manhães, J. Peluzio, Osvaldo José Ferreira Júnior, Mauro Gomes dos Santos, Ismael de Oliveira Pinto, Renisson Neponuceno de Araújo Filho, Allan Deyvid Pereira da Silva, Jader Nunes Cachoeira, G. N. Scheidt","doi":"10.21475/ajcs.24.18.02.pne3872","DOIUrl":"https://doi.org/10.21475/ajcs.24.18.02.pne3872","url":null,"abstract":"Agricultural expansion is advancing on marginal soils (Plinthic soils), but the liming recommendation for this soil, especially for soybean cultivation, remains unknown. This study aimed to evaluate soybean (Glycine max) responses to limestone doses in concretionary soils (plinthic and/or petroplinthic). The experiment was carried out in the greenhouse, in randomized blocks, with four soil types and six limestone doses (4x6 factorial scheme), with four replicates. Soils were: RYO: Red-Yellow Oxisols; CPP-29, CPP-72, CPP-82 corresponds to the Concretionary Petric Plinthosol with 29, 72, and 82% concretions, respectively. Limestone doses varied from 0 to 4 times for each soil, based on the recommendation of regional bulletins. Soil temperature, crop emergence, development, and soybean yield characteristics were evaluated. Results were evaluated by ANOVA, followed by the LSD test or polynomial regression adjustment (p ≤ 0.05). Soybean response to liming varied with soil types. Seedlings showed lower vigor in Plinthic soils with plinthite contents ≥72%. These soils showed higher thermal accumulation (°C), and this increase showed a strong negative correlation with soybean development and reproductive characteristics. Evidence of liming response was observed after crop stage V5. Limestone substantially improved soybean growth and development in Plinthic soils with high plinthite levels, although they had lower yield potential than low plinthite levels and Oxisol. In general, the maximum response of the crop occurred at doses ~2 times higher than that practiced in the Brazilian Savanna region, especially in Plinthic soils","PeriodicalId":518858,"journal":{"name":"February 2024","volume":"1218 38","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140528878","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 : 2024-02-01DOI: 10.21475/ajcs.24.18.02.pne4047
Alejandro Soares Montaño, Pedro Batista Rosa de Brito, Yohana Clara Siqueira Santana, G. F. Theodoro, Fernando França da Cunha
This study aimed to assess the agronomic performance of five sorghum hybrids irrigated with two replacement levels of crop evapotranspiration (ETc). The experimental design was randomized blocks in a 5x2 factorial scheme with four replications. The factors were dual-purpose sorghum hybrids (AGRI 002-E, AGRI G1, AGRI G2, BREVANT SS318 and BRS 58) and water replacement levels (50% and 100% of ETc). The replacement of 50% of ETc was defined as water deficit (WD). The experiment was conducted in a greenhouse, and sorghum was grown in pots. The mean comparison test showed that plants under WD condition had low values of height, stem diameter, leaf area, chlorophyll content, and a 37% reduction in shoot dry mass productivity. The analysis of principal components revealed that the correlations between the variables changed according to the water regimes. Under WD, water productivity, shoot dry mass, and leaf area index were highly correlated with each other and with the hybrid AGRI 002-E. The hybrid AGRI 002-E showed better performance under normal irrigation conditions, while under WD conditions, the hybrids BREVANT SS318 and BRS 658 also showed good performance. Hybrids with higher leaf area and water productivity performed better under water-scarcity conditions
{"title":"Agronomic performance of dual-purpose Sorghum bicolor (L.) hybrids under water deficit","authors":"Alejandro Soares Montaño, Pedro Batista Rosa de Brito, Yohana Clara Siqueira Santana, G. F. Theodoro, Fernando França da Cunha","doi":"10.21475/ajcs.24.18.02.pne4047","DOIUrl":"https://doi.org/10.21475/ajcs.24.18.02.pne4047","url":null,"abstract":"This study aimed to assess the agronomic performance of five sorghum hybrids irrigated with two replacement levels of crop evapotranspiration (ETc). The experimental design was randomized blocks in a 5x2 factorial scheme with four replications. The factors were dual-purpose sorghum hybrids (AGRI 002-E, AGRI G1, AGRI G2, BREVANT SS318 and BRS 58) and water replacement levels (50% and 100% of ETc). The replacement of 50% of ETc was defined as water deficit (WD). The experiment was conducted in a greenhouse, and sorghum was grown in pots. The mean comparison test showed that plants under WD condition had low values of height, stem diameter, leaf area, chlorophyll content, and a 37% reduction in shoot dry mass productivity. The analysis of principal components revealed that the correlations between the variables changed according to the water regimes. Under WD, water productivity, shoot dry mass, and leaf area index were highly correlated with each other and with the hybrid AGRI 002-E. The hybrid AGRI 002-E showed better performance under normal irrigation conditions, while under WD conditions, the hybrids BREVANT SS318 and BRS 658 also showed good performance. Hybrids with higher leaf area and water productivity performed better under water-scarcity conditions","PeriodicalId":518858,"journal":{"name":"February 2024","volume":"100 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140529031","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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