综合控镉技术体系对湖南中南部地区受镉污染稻田的影响研究
The Impact of Comprehensive Cadmium Control Technology System on Cadmium Contaminated Rice Fields
匡志明 1王晓辉 1谢玉华 1雷梦龙 1文明辉 1谷亚娟1
作者信息
- 1. 湖南耒阳市农业农村局,湖南耒阳 421800
- 折叠
摘要
本研究旨在评估"VIP+n"综合控制镉技术体系对湖南中南部地区受镉污染的稻田稻谷中镉含量的影响.在湖南省耒阳市遥田镇连续进行了为期2年的实验,包括小区对比试验和推广示范试验.在小区对比试验阶段,我们采用了 10种不同的处理方式,比较了低镉积累水稻品种、稻田持续淹水灌溉、生石灰施用、微生物菌剂、叶面阻控剂等多种措施对减少稻田中镉含量的效果.根据这些小区试验的结果,选取3种降镉效果好,且经济可行的降镉技术进行大面积示范试验.研究结果显示,"VIP+n"控镉技术体系能够有效降低镉污染稻田中的稻谷镉含量.与对照组相比,该技术体系使得早稻的降镉率在59.66％％～79.45％,晚稻的降镉率则在46.85％～48.23％.在各项降镉措施中,施用生石灰可以显著降低稻谷中镉含量,而单独使用低镉品种的降镉效果要显著高于单独施用生石灰.相比之下,稻田持续淹水灌溉、施用微生物菌剂和叶面阻控剂降镉效果并不明显.试验结果表明,"VIP+n"控镉技术体系是一种有效的方法,能够显著降低湖南中南部受镉污染的稻田中稻谷的镉含量.
Abstract
This study aims to explore the impact of the"VIP+n"comprehensive cadmium control technology system on cadmium-polluted paddy fields in the central and southern parts of Hunan Province.The experiments were conducted in Yaotian town of Leiyang City for two consecutive years,including plot comparative experiments and large-scale demonstration experiments.In the plot comparative experiments,10 treatments were employed to compare the effects of measures such as low-cadmium-accumulating rice varieties,continuous flooding irrigation,application of quicklime,microbial agents,and foliar inhibitors on cadmium-polluted paddy fields.Based on the results of the plot experiments,three cadmium-reducing technologies with good efficacy and economic feasibility were selected for large-scale demonstration experiments.The results showed that the"VIP+n"cadmium control technology system effectively reduced the cadmium content in rice grains in cadmium-contaminated paddy fields.Compared to the control group,the cadmium reduction rate for early rice using this technology system ranged from 59.66％to 79.45％,while for late rice,it ranged from 46.85％to 48.23％.Among the various cadmium reduction measures,the application of quicklime significantly reduced the cadmium content in rice grains,and the use of low-cadmium varieties alone had a significantly higher cadmium reduction effect than using quicklime alone.In contrast,continuous flooding irrigation,application of microbial agents,and foliar inhibitors did not show significant cadmium reduction effects.
关键词
稻田镉污染/生石灰施用/低镉水稻品种/水分管理/修复技术Key words
cadmium contamination in paddy fields/application of quicklime/low-cadmium rice varieties/water management/remediation technique引用本文复制引用
基金项目
湖南省财政预算项目(2130135)
耒阳市受污染耕地安全利用项目(HZY-CG-21259)
出版年
2024
国家科技期刊平台
NSTL
万方数据