摘要
我国土壤镉(Cd)污染区与水稻种植区在空间分布上基本吻合,水稻属于易积累Cd的作物之一。浙江省西南部分区域,由于母质原因,出现地质性重金属高背景值现象。本研究开展了中轻度Cd污染耕地安全利用的核心技术田间试验,包括低积累水稻品种筛选、钝化修复材料筛选、农艺调控措施三项技术。结果表明:采用水稻甬优1540+石灰100 kg/亩+全生育期淹水+有机肥1150 kg/亩的安全利用集成技术模式能最大限度地降低水稻籽粒中的Cd含量,可以作为该区域镉高背景值耕地的水稻安全利用技术集成模式并推广应用。
The spatial distribution of cadmium(Cd)contaminated areas in soil is consistent with that of rice growing areas,and rice is one of the crops that are easy to accumulate Cd in China.In addition,soil Cd bioavailability is higher in low pH areas(southern China),and Cd content in rice is higher,which seriously restricts crop and product safety and endangers human health.In the mountainous areas of southwest Zhejiang province,due to the influence of the high background value of geological heavy metals,the content of heavy metals,especially Cd,is relatively high in the paddy soil.In order to find suitable technologies for safe utilization of rice in cultivated land contaminated by Cd,this paper studied three technologies for safe utilization of cultivated land contaminated by Cd,including low accumulation variety selection,passivation modification and screening,and agronomic control measures.The results showed that the Cd content in rice grains could be reduced to the maximum by using Yongyou 1540 variety+lime 100 kg/mu+flooding during the whole growth period+organic fertilizer 1150 kg/mu.
作者
陈振华
朱阳春
CHEN Zhenhua;ZHU Yangchun(School of Environment and Resources,Zhejiang Agriculture&Forest University,Hangzhou,311300,Zhejiang;Jingning County Bureau of Agriculture and Rural Areas,Jingning 323500,Zhejiang;School of Ecology,Lishui University,Lishui 323000,Zhejiang)
出处
《丽水学院学报》
2023年第2期71-76,共6页
Journal of Lishui University
关键词
耕地
水稻
镉污染
安全利用
cultivated land
rice
cadmium pollution
safe utilization
