Studies on soil rhizosphere: speciation and availability of Cd
Studies on soil rhizosphere: speciation and availability of Cd
复制标题
土壤根际研究：镉的形态和有效性
DOI：
10.1080/09542299.1996.11083263
复制
发表时间：
1996
影响因子：
--
通讯作者：
K. Rees
中科院分区：
文献类型：
--
作者：
G. Krishnamurti;P. Huang;K. Rees
摘要：在萨斯喀彻温省南部的两个选定土壤中生长的两个硬粒小麦（Triticum turgidum var. durum L.）品种 Kyle 和 Areola 在 2 周和 7 周植物生长阶段收集根际土壤。镉有效性指数（CAI）（确定为 M NH4CI 可提取的 Cd）、pH 值以及土壤中颗粒结合的 Cd 种类的分布，并与相应的土体土壤的数据进行比较，对数据进行了讨论。在2周的生长阶段，根际土壤的pH值低于相应的大块土壤，并且根际土壤的CAI值较高，表明更多的Cd在土壤-根界面处与低分子量有机酸（LMWOA）络合，并可被M NH4CI萃取。与大块土壤相比，在2周的生长期施用爱达荷州磷酸一铵肥料的地块根际土壤CAI值高出2-9倍，这归因于...
ABSTRACTThe rhizosphere soils of two durum wheat (Triticum turgidum var. durum L.) cultivars Kyle and Areola grown in two selected soils of southern Saskatchewan were collected both at 2-week and 7-week plant growth stages. The cadmium availability index (CAI), determined as M NH4CI-extractable Cd, pH and the distribution of the particulate- bound Cd species of the soils were carried out and the data were discussed in comparison with those of the corresponding bulk soil. At the 2-week growth stage, the pH of the rhizosphere soil was less than that of the corresponding bulk soil and the CAI values were higher in the rhizosphere soil, indicating that more Cd was complexed with the low-molecular-weight organic acids (LMWOAs) at the soil-root interface and was extractable by M NH4CI. Compared with the bulk soils, the CAI values were 2–9 times higher in the soil rhizosphere of the plots fertilized with Idaho monoammonium phosphate fertilizer at 2-week growth stage, which is attributed to the combined effects o...