Effect of rice variety on zinc, cadmium, iron, and manganese content in rhizosphere and non-rhizosphere soil fractions
Effect of rice variety on zinc, cadmium, iron, and manganese content in rhizosphere and non-rhizosphere soil fractions
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DOI：
10.1080/00103629709369769
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发表时间：
1997
影响因子：
1.8
通讯作者：
L. M. Shuman;J. Wang
中科院分区：
文献类型：
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作者：
L. M. Shuman;J. Wang
摘要在水稻品种选育研究中，在筛选抗金属毒害水稻品种的基础上，研究了不同氧化能力水稻品种对根际土壤中金属形态的影响。4个水稻品种在3种不同铁锰氧化物含量的土壤上种植40 d。使用尼龙网“根瘤袋”将根际土壤与非根际土壤分开;用5 mg/kg镉（Cd）或20 mg/kg锌（Zn）处理土壤。在实验结束时，土壤进行了分析，使用连续分馏方案的五种形式的镉，锌，铁，锰。根际土壤的pH（p=0.14）和P（p=0.05）低于非根际土壤。锰氧化物部分中的铁在根际中比非根际土壤高十倍，而根际土壤Mn在该部分中较低。根际土壤中镉含量随施肥量的增加而增加。
Abstract In research on selecting rice (Oryza sativa L.) cultivars that are resistant to metal toxicity, an experiment was carried out with the objective of determining the effects of rice cultivars with differing oxidizing powers on the forms of metals in the rhizosphere soil. Four rice varieties were grown for 40 d in 3 soils which had differing amounts of iron (Fe) and manganese (Mn) oxides. The rhizosphere soil was kept separate from the non‐rhizosphere using nylon mesh “rhizobags”;. The soils were treated with either 5 mg/kg cadmium (Cd) or 20 mg/kg zinc (Zn). At the end of the experiment the soils were analyzed using a sequential fractionation scheme for five forms of Cd, Zn, Fe, and Mn. The rhizosphere soil was lower in pH (p=0.14) and P (p=0.05) than the non‐rhizosphere soil. Iron in the Mn oxide fraction was ten times higher in the rhizosphere as opposed to the non‐rhizosphere soil while the rhizosphere soil Mn was lower in this fraction. Cadmium in the rhizosphere soil was increased in both the ...