摘要
通过野外调查与盆栽试验相结合，探讨配合施用石灰、腐殖酸和膨润土3种抑制剂对降低莴笋可食部分铅含量的最佳效果，找出最优先控制的蔬菜和最优化控制的元素．研究结果表明：配合施用腐殖酸、膨润土及石灰修复同时受Ph污染的土壤，既可保证作物不减产，又能大幅度降低蔬菜可食部分重金属的含量，石灰、膨润土按1：10配施与污染黄壤上，可使莴笋生物量增产22．8％，同时降低其可食部分Pb含量分别达到20．0％～54．0％，按1：5：5配施腐殖酸、膨润土和石灰，仍可保持蔬菜产量不减，并明显降低莴笋吸收的Pb量。铅含量分别降低了41％～48％．40％～46％。
Fieht investigation and pot experiment were combined to study the effects of application of limestone, humid acid and bentonite on the content of lead （Pb） in the eatable parts of lettuce. The results showed that incorporation of limestone, humid acid and bentonite to Pb-polluted soil did not reduce the yield of lettuce and, at the same time, decreased the contents of heavy metals in its eatable parts. Application of limestone and bentonite at a ratio of l ： 10 to a Pb-polluted yellow soil increased lettuce biomass by 22.8% and decreased Pb content in the eatable parts by 20.0% -54.0%. The optinlum ratio of limestone： humic acid： bentonite appeared to be 1 ： 5 ： 5, which reduced Pb contents in lettuce by 41% -48% and 40% -46% , respectively, on purple soil and yellow soil.
出处
《西南农业大学学报（自然科学版）》
CSCD
北大核心
2006年第5期710-713,共4页
Journal of Southwest Agricultural University
基金
重庆市中青年科技专家基金资助项目
关键词
蔬菜
铅
调控
vegetable
lead
regulation
