Dissolved organic phosphorus and sulphur as influenced by sorptive interactions with mineral subsoil horizons
Dissolved organic phosphorus and sulphur as influenced by sorptive interactions with mineral subsoil horizons
复制标题
受与矿物底土层吸附相互作用影响的溶解有机磷和硫
DOI：
--
复制
发表时间：
2001
期刊：
影响因子：
--
通讯作者：
K. Kaiser
中科院分区：
文献类型：
--
作者：
K. Kaiser
本研究验证了这样一个假设，即与溶解有机氮（N）一样，溶解有机磷（P）和硫（S）在土壤中比有机碳（C）更具移动的性。为此，我比较了有机磷和硫与有机碳在底土材料中的吸附。土壤样品与来自森林地面的水溶性有机质在pH 4下平衡，并在平衡溶液中平衡有机C、P和S，并确定它们在亲水性和疏水性部分之间的分布。 C在有机质中的吸附与P和S的吸附没有差异。然而，亲水部分包含绝大多数的P和S和吸附远远低于疏水部分。因此，有机磷和硫的总截留量小于有机碳。这一结果表明，溶解性有机质是更重要的植物养分的损失比释放的C从土壤中。
This study tested the hypothesis that, like dissolved organic nitrogen (N), dissolved organic phosphorus (P) and sulphur (S) are more mobile in soil than is organic carbon (C). To do so, I compared the sorption of organic P and S to subsoil materials with that of organic C. Soil samples were equilibrated with water‐soluble organic matter from the forest floor at pH 4 and in the equilibrium solutions organic C, P, and S, and their distributions between the hydrophilic and hydrophobic fraction were determined. Sorption of C within the organic matter did not differ from that of P and S. However, the hydrophilic fraction contained the vast majority of P and S and sorbed far less than the hydrophobic fraction. So the overall retention of organic P and S was smaller than that of organic C. This result suggested that dissolved organic matter is more important in the loss of plant nutrients than in the release of C from soil.