改良剂对镉胁迫蔬菜养分吸收的影响

通过盆栽试验,研究了人工镉污染土壤上施用猪粪、石灰、过磷酸钙3种改良剂对萝卜、莴苣和豇豆3种蔬菜生长及成熟期各器官吸收养分(N、P、K)的影响.结果表明,3种改良剂均显著促进镉胁迫蔬菜的生长,其生物量表现为猪粪处理＞过磷酸钙处理＞石灰处理；3种改良剂均显著提高了蔬菜对土壤养分(N、P、K)的吸收,其中,N、P吸收最大值为过磷酸钙高浓度处理,K吸收最大值为猪粪高浓度处理;在猪粪高浓度处理下,萝卜、莴苣和豇豆生物量分别较相应对照提高了94.43％、139.51％和106.56％.

Effects of Modifiers on Nutrient Uptake of Vegetable under Cadmium Stress

The effects of three different types of modifiers(pig manure,lime,and superphosphate) applied in cadmium contaminated soil on the growth and nutrients uptake of three kinds of vegetables(radish,lettuce and cowpea) were analyzed.The results showed that three kinds of modifiers were significantly promoted the growth of vegetable under cadmium stress,and the order of biomass promoted was pig manure > superphosphate > lime.The 3 kinds of modifiers significantly increased the nutrients uptake of vegetable;and the maximum N and P uptake of was caused by high concentration of superphosphate;the maximum absorption of K was arosed by high concentration of pig manure.The biomass of radish,lettuce and cowpea was increased by 94.43%,139.51% and 106.56% respectively under high concentration of pig manure condition.