添加茶籽粕和EDTA对土壤中镍和锌形态变化及植物有效性的影响  

Effects of applying tea seed meal and EDTA on the speciation transformation and phyto-availability of nickel and zinc in soil

作　　者：俞斌[1] 夏会龙[1] 

机构地区：[1]浙江工商大学环境科学与工程学院,杭州310012

出　　处：《应用生态学报》2013年第6期1615-1620,共6页Chinese Journal of Applied Ecology

基　　金：浙江省自然科学基金项目(Y5090229);浙江省新苗人才计划项目(2011R408040)资助

摘　　要：采用盆栽试验,研究了茶籽粕和EDTA对土壤中重金属镍和锌形态变化和植物有效性的影响.结果表明:随着茶籽粕施用量的增加,甘蔗根、茎、叶的生物量逐渐增加,而EDTA处理甘蔗茎、叶的生物量与对照无显著差异.茶籽粕和EDTA的添加提高了土壤中酸溶态镍和锌含量,促进甘蔗对镍和锌的吸收及向地上部位转运,并且随着茶籽粕施用量的增加,其促进效果逐渐增强.与EDTA相比,茶籽粕对提高甘蔗体内镍和锌积累量效果明显,使甘蔗从土壤中迁移出更多的镍和锌.甘蔗茎、叶中镍和锌含量与茶籽粕的用量呈极显著正相关,而根中镍和锌含量与茶籽粕用量呈极显著负相关.A pot experiment with sugarcane was conducted to study the effects of applying tea seed meal and EDTA on the speciation transformation and phyto-availability of nickel （Ni） and zinc （Zn） in soil. With the increasing application rate of tea seed meal, the biomass of sugarcane root, stem, and leaf increased gradually, but no significant difference was observed in the stem and leaf biomass between EDTA treatments and the control. Applying tea seed meal and EDTA increased the acid-soluble Ni and Zn contents in soil, and promoted the bioconcentration and translocation of Ni and Zn in sugarcane. Meanwhile, the strengthening effect increased gradually with the increasing application rate of tea seed meal. As compared with EDTA, tea seed meal was more efficient in improving the accumulation of Ni and Zn in sugarcane, and thus, made the sugarcane remove more Ni and Zn from soil. The Ni and Zn contents in sugarcane stem and leaf had significant positive correlations with the application rate of tea seed meal, while the Ni and Zn contents in sugarcane root were significantly negatively correlated with the application rate of tea seed meal.

关 键 词：茶籽粕 EDTA 甘蔗 镍 锌 积累 

分 类 号：S566.1[农业科学—作物学] X53[环境科学与工程—环境工程]