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氮肥对油菜在不同土壤中吸收积累Cd的影响
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Journal Article
氮肥对油菜在不同土壤中吸收积累Cd的影响
2019
Overview
以三种不同程度Cd污染土壤为材料，通过盆栽试验研究NH4Cl和（NH4）2SO4两种氮肥对土壤Cd有效性及油菜吸收、转运Cd的影响，评价油菜对Cd的生物累积量，以期为油菜修复Cd污染土壤的优化施肥措施提供理论支撑。结果表明：施加NH4Cl和（NH4）2SO4均显著降低了土壤的pH，（NH4）2SO4处理土壤pH低于施加NH4Cl处理的土壤，施肥处理下生长期非根际土pH低于根际土，成熟期非根际土pH高于根际土。施加（NH4）2SO4和NH4Cl均使土壤中有效态Cd含量增加。（NH4）2SO4处理有效态Cd的浓度高于NH4Cl处理。油菜成熟期土壤中有效态Cd的浓度低于生长期，生长期和成熟期整体表现出根际土中Cd的总量高于非根际土。施加（NH4）2SO4和NH4Cl均增加油菜各部位Cd的含量，提高油菜的富集系数和转运系数，油菜从根到叶对Cd的转运系数最高。研究表明油菜作为Cd污染土壤的修复植物有一定安全保障。
Publisher
农业农村部环境保护科研监测所,中国农业生态环境保护协会
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