期刊论文

Effects of lime,silicon-calcium-magnesium amendments on Cd absorption and accumulation in different soil-rice systems

中文

环境化学

0254-6108

2019

38

6

1298-1306

10.7524/j.issn.0254-6108.2018071703

国家科技支撑计划项目(2015BAD05B02) 农业部财政部重大专项(农办财函[2016]6号) 湖南省重点学科建设项目(2006180)资助.

本校为第一机构

为研究改良剂(石灰、硅钙镁肥)对典型稻田土壤-水稻系统Cd吸收累积的影响,选取河沙泥(潮土母质发育)和紫泥田(紫色砂页岩母质发育)模拟制备成中度Cd污染土壤,施加不同用量的石灰和硅钙镁肥,进行水稻盆栽试验,分析土壤pH、土壤Cd形态以及水稻各部位Cd含量变化,探讨不同改良剂对不同土壤-水稻系统Cd吸收累积的影响.结果表明,施用石灰和硅钙镁肥能显著提高河沙泥土壤pH值,分别提高0.62— 0.79个单位、0.35—0.46个单位,但对紫泥田pH值无显著影响.向河沙泥中施用石灰能降低其土壤酸提取态 Cd含量,且在S3.0处理时降幅最大;而紫泥田施用硅钙镁肥能显著降低其酸提取态Cd.施用石灰和硅钙镁均能降低河沙泥...

In order to investigate the effects of amendments (lime,silicon-calcium-magnesium fertilizer) on Cd absorption and accumulation in rice in typical paddy fields,pot experiments were conducted which selected alluvial sandy soil (developed from moisture soil parent materials) and purple clayey soil (developed from purple sand shale parent materials) to simulate and prepare soil samples with moderate Cd contamination. As well as different amounts of lime and silicon-calciummagnesium fertilizer. The pH,soil Cd fractions and the Cd contents in various parts of rice,were analyzed and the effects of a...