土施和喷施硅肥对镉污染农田水稻不同部位镉含量及富集的影响  

Effects of Soil and Foliar Applications of Silicon Fertilizer on Cd Content and Its Bioconcentration Factors in Different Parts of Rice Growing in Cadmium Contaminated Soil

作　　者：黄崇玲[1] 雷静[1] 顾明华[1] 窦飞[1] 蒋雄英[1] 谭力[1] 

机构地区：[1]广西大学农学院,广西南宁530005

出　　处：《西南农业学报》2013年第4期1532-1535,共4页Southwest China Journal of Agricultural Sciences

基　　金：广西科技开发计划项目(桂科攻1123001-9B)

摘　　要：以水稻(Oryza sativa)为研究对象,进行大田试验,探讨在重金属镉污染土壤(总Cd含量为5.78 mg·kg-1)上施用不同硅肥对水稻产量、水稻不同部位镉含量的影响。结果表明:土施硅肥(750 kg/hm2)、喷施0.2%无机硅溶胶、喷施0.2%有机硅溶胶均增加了水稻产量,显著地降低了水稻根、茎叶和稻米中Cd的含量及其富集系数,其中,稻米Cd含量分别下降了49.04%、60.55%、62.19%。土施硅肥对水稻的增产效应高于喷施硅溶胶,而喷施硅溶胶对降低水稻Cd含量的效应优于土施硅肥。A field experiment of rice was conducted to investigate the effects of different Si application methods （ soil application or foliar spray） on the content and bioconcentration of cadmium in different parts d rice growing in the cadmium contaminated soil, which total Cd content was 5.78 mg· kg-1. The results showed that the soil（750 kg/hm2 ）and foliar applications（0.2 % inorganic silica sol,0.2 % or- ganic silica sol）of silicon fertilizer increased the yield, and significantly reduced the Cd content and its bioconcentration factors in different parts of rice, among them, the Cd content of brown rico decreased by 49.04 %, 60. 55 % and 49.04 %, respectively. The effect of silicon fertilizer soil application on rice yield was higher than that of silicon fertilizer spraying, but the effect of silicon fertilizer spraying to reduce the Cd content of brown rice was better than that of silicon fertilizer soil application.

关 键 词：硅肥 施用方法 镉富集 生长部位 水稻 

分 类 号：S143.79[农业科学—肥料学]