杭州师范大学学报（自然科学版）2018，Vol.17Issue(1)：72-77,6.DOI:10.3969/j.issn.1674-232X.2018.01.016
中性污染稻田淹水配施硫化物对降低糙米Cd积累的效果
Effects of Flooding with Sulfide Application on the Reduction of Cadmium Accumulation in Brown Rice in a Neutral Contaminated Paddy Soil
摘要
Abstract
In order to explore the measures to reduce the Cd content of grown rice in neutral polluted soil,a pot experiment was carried out to test the effects of flooding and sulfur compounds on Cd accumulation in the rice plants.The experiment was set up with six treatments,ie,conventional management,long-term flooding,long-term flooding + addition of 0.1% sodium sulfide,long-term flooding + addition of 0.1% sodium hydrosulfide,long-term flooding + addition of 0. 1% potassium sulfide,and long term flooding + addition of 0.1% calcium sulfate,and run for 3 season plantations of rice-vegetable-rice.The content of active Cd in the soil and the accumulation of Cd in rice and vegetables were observed.The effects of different sulfur compounds on Cd contents in brown rice were characterized.The results showed that long-term flooding could significantly reduce the level of available Cd in the soil and the content of Cd in brown rice,as compared with the conventional management.Treatments with long-term flooding + addition of 0.1% sodium sulfide,and long-term flooding + addition of 0.1% sodium hydrosulfide decreased 38.24% ~50.00% of Cd content in brown rice as compared with the long-term flooding.However,there was no significant difference in Cd content of brown rice between long term flooding + addition of 0.1% calcium sulfate and long-term flooding treatment.Soil water-logging treatment during the rice grow th period had no significant effect on Cd accumulation in the succeeding vegetable crop.But addition of sodium sulfide, sodium hydrosulfide,or potassium sulfide during the rice growth period still had significant reducing effects of cadmium accumulation on the following vegetable crops.Controlling the water soluble cadmium and the available Cd in the soil is the main reason for the reduction of Cd accumulation in brown rice.关键词
中性土壤/硫化物/Cd污染/农产品安全Key words
neutral soil/sulfide/Cd pollution/agricultural product safety分类
资源环境引用本文复制引用
倪中应,石一珺,邱志腾,章明奎..中性污染稻田淹水配施硫化物对降低糙米Cd积累的效果[J].杭州师范大学学报（自然科学版）,2018,17(1):72-77,6.基金项目
国家重点研发计划专项项目(2017YFD0800305). （2017YFD0800305）
