Short chain organic acid dynamics in solution of flooded soil treated with ryegrass residues
Short chain organic acid dynamics in solution of flooded soil treated with ryegrass residues
复制标题
用黑麦草残留物处理的淹水土壤溶液中的短链有机酸动力学
DOI：
10.1081/css-120003065
复制
发表时间：
2002
影响因子：
1.8
通讯作者：
E. J. Meurer
中科院分区：
文献类型：
--
作者：
Rogério Oliveira de Sousa;Maria do Carmo Ruaro Peralba;E. J. Meurer
短链有机酸（C2至C5），对水稻有毒，可以产生在淹水土壤中的有机残留物处理。为了研究有机酸释放到用黑麦草作物残留物处理的淹水土壤溶液中，在温室中进行了实验。试验计划在随机区组中进行，其中三个重复使用以下处理：（a）不含黑麦草残留物，（B）将黑麦草残留物保留在土壤表面，以及（c）将黑麦草残留物掺入土壤中。有机酸乙酸，丙酸，丁酸，异丁酸，戊酸，异戊酸，在八周内进行了评价，通过气相色谱法。结果表明，施用黑麦草秸秆增加了土壤溶液中有机酸的浓度。最高浓度在10厘米深的结合黑麦草。然而，在2厘米深的有机酸浓度与表面上保持黑麦草一样高，可能在水稻的毒性水平。乙酸是所有处理的土壤溶液中浓度最高的一种。
Short chain organic acids (C2 to C5), toxic for paddy rice, can be produced in flooded soils treated with organic residues. In order to study the liberation of organic acids into the solution of a flooded soil treated with residues of a ryegrass crop, an experiment was carried out in the greenhouse. The trial was planned in random blocks with three replicates using the following treatments: (a) without ryegrass residues, (b) ryegrass residues kept on the soil surface, and (c) ryegrass residues incorporated into the soil. The organic acids acetic, propionic, butyric, isobutyric, valeric, and isovaleric, were evaluated during eight weeks by gas chromatography. Results showed that the use of ryegrass residues increases the organic acids concentration in the soil solution. The highest concentrations were obtained at 10 cm deep with incorporated ryegrass. However, the organic acid concentration at 2 cm deep with ryegrass kept on the surface was equally high, probably at toxic levels for paddy rice. Acetic acid was the one presented at the highest concentration in the soil solution for all treatments.