期刊论文

Regulation Control of a Tribasic Amendment on the Chemical Fractions of Cd and As in Paddy Soil and Their Accumulation in Rice

Gu, Jiao-Feng(gujiaofeng@163.com);Zhou, Hang(zhouhang4607@163.com)

中文

环境科学

0250-3301

2021

42

1

378-385

10.13227/j.hjkx.202006126

41907126:国家自然科学基金 2018JJ3880:湖南省自然科学基金 2018JJ3881:湖南省自然科学基金 kq1901138:长沙市科技计划

本校为第一机构

为研究三元复合调理剂(石灰石+硅藻土+硫酸铁,LDF)对稻田土壤Cd 和As 赋存形态及水稻糙米Cd 和As 累积的影响,开展水稻盆栽试验.LDF按质量比设置7个施用水平(0、0.5、1.0、2.0、4.0、8.0和16.0 g·kg-1),种植2种水稻(黄华占和T优272).结果表明:①施用LDF分别提高黄华占和T优272根际土壤pH 0.01～0.42和0.11～0.54单位,降低土壤交换态Cd含量11.1％～61.1％和26.5％～52.9％,同时降低土壤交换态As 含量8.2％～60.0％和5.6％～49.9％;②施用LDF 能促进Cd、As向难溶态的转变,尽管2种水稻根际变化趋势不一致,但都可降低土壤Cd的酸可提取态占比,而增大铁锰结合态、有机结合态和残渣态占比,同时可降低A...

A pot experiment was conducted to identify the effect of a tribasic amendment (limestone+diatomite+ferric sulfate, LDF) on chemical fractions of Cd and As in paddy soils and their accumulation in brown rice. LDF was set to seven levels (0, 0.5, 1.0, 2.0, 4.0, 8.0, and 16.0 g•kg-1) based on the quality ratio, and two genotypes of rice were planted (Huanghuazhan and T-you 272). The results show that: ① The application of LDF increased the rhizosphere soil pH of two varieties of rice, Huanghuazhan and T-you 272, by 0.01-0.42 and 0.11-0.54, respe...