Gypsum and Legume Residue as a Strategy to Improve Soil Conditions in Sustainability of Agrosystems of the Humid Tropics
Gypsum and Legume Residue as a Strategy to Improve Soil Conditions in Sustainability of Agrosystems of the Humid Tropics
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DOI：
10.3390/su10041006
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发表时间：
2018-04-01
期刊：
影响因子：
3.9
通讯作者：
Ferreira Aguiar, Alana das Chagas
中科院分区：
文献类型：
--
作者：
de Moura, Emanoel Gomes;Portela, Stefanny Barros;Ferreira Aguiar, Alana das Chagas
石膏与豆科残渣结合可以提高生根性并改善生长和玉米籽粒产量。本研究的目的是评估石膏和豆科残留物对根区土壤生根性以及粘性热带土壤中玉米籽粒产量的综合影响。我们使用了七种治疗方法：（i）对照； (二) 尿素； (iii) 豆科植物； (iv) 6 吨/公顷石膏与豆科植物或 (v) 与尿素或 (vi) 两者同时使用； (vii) 12 吨/公顷的石膏、尿素和豆科植物。 2010 年 1 月施用石膏，并于 2012-2015 年对土壤样本进行分析。玉米于 2011-2013 年和 2015 年播种，当时确定了玉米产量。 2015年进行了土壤渗透强度和植物组织分析。2015年还测定了叶面积指数、氮积累量、总氮浓度和氮再动员量。含有豆科残留物的石膏通过增加钙和有机质水平以及降低土壤渗透强度来改变根区。由于抽雄前后吸收量增加，叶面积指数和氮向籽粒的再利用增加。石膏和豆科残留物的组合是改善潮湿热带粘性土壤农业系统的更合适策略。
Gypsum combined with leguminous residue may extend rootability and improve growth and maize grain yield. The aim of this study was to evaluate the combined effects of gypsum and leguminous residue on soil rootability in the root zone and on maize grain yield in a cohesive tropical soil. We used seven treatments: (i) control; (ii) urea; (iii) leguminous; (iv) 6 t/ha of gypsum with leguminous or (v) with urea or (vi) with both; and (vii) 12 t/ha of gypsum with urea and leguminous. Gypsum was applied in January 2010 and soil samples were analyzed in 2012-2015. Maize was sown in 2011-2013 and 2015, when maize yield was determined. Soil penetration strength and the analysis of plant tissue was performed in 2015. The leaf area index, nitrogen accumulation amount, total N concentration and amount of N remobilization were also determined in 2015. Gypsum with leguminous residue modified the root zone by increasing calcium and organic matter levels and by reducing soil penetration strength. The leaf area index and the remobilization of nitrogen to grains increased, due to greater uptake before and after tasseling. The gypsum and leguminous residue combination is a more suitable strategy to improve agrosystems in cohesive soils of the humid tropics.