摘要
To investigate the effects of“Runbang”soil conditioner on simultaneously decreasing cadmium(Cd)and arsenic(As)in early-season paddy field,a typical red mud field in Hunan Province was selected for monitoring the dynamic changes of Cd and As contents in early-season rice plants and soils,plus the soil physical-chemical properties and rice yields.Results of the field experiments indicated that the soil conditioner could significantly reduce Cd and As contents in soil and rice grain,whereas it could increase rice yield.Applying Runbang soil conditioner(1500~2100 kg/hm^2)to paddies brought about a reduction of 23.7%~44.8% and 24.3%~40.5% in available Cd and As contents of the soil,an increase of 0.9~1.1 units in soil pH value,a decline of 35.6%~51.1% and 22.0%~40.6% in Cd and As contents of rice grains,and a rise of 2%~5% in rice yields,respectively.
为研究“润邦牌”土壤调理剂在稻田同步降低镉、砷含量的应用效果,选取湖南典型的红泥田,在施用本土壤调理剂后,考察土壤理化性质、水稻植株及土壤中镉和砷含量的动态变化。田间试验结果表明:该土壤调理剂可显著减少土壤和稻米中的镉砷含量,提高水稻产量。施用该土壤调理剂1500~2100 kg/hm^2,土壤中有效镉含量降低23.7%~44.8%,有效砷下降24.3%~40.5%,土壤pH值提高0.9~1.1个单位,稻米镉含量减少35.6%~51.1%,稻米砷含量降低22.0%~40.6%,水稻增产2%~5%。
基金
长沙市科技局重大专项(kq1703010)
湖南农业科技创新联盟项目(2017LM0305)
湖南省科学技术厅重点研发计划(2015NK3056,2017NK2144)
重金属污染耕地安全高效利用湖南省工程研究中心开放研究基金资助项目(TGOP-001)。
