石灰与有机物料配施对作物镉铅吸收的控制效果研究

Effects of Lime Complexation Organic Manure on Uptake of Cd, Pb by Crops

通过采用石灰(L)、泥炭(P)、猪粪(M)、石灰+泥炭(LP)、石灰+猪粪(LM)等处理对福建省龙岩市新罗区特钢厂附近污染田进行改良的田间定位试验。表明大部分处理能提高土壤的pH值、有机质含量。处理石灰、石灰+泥炭和石灰+猪粪对提高作物产量均有显著效果。大部分处理能抑制水稻、花生对Cd、Pb的吸收,糙米中Pb的含量在食品卫生标准范围内。说明通过调节土壤pH值,改变土壤重金属活性是有机-中性化改良技术的主要机理。

Field plot experiments were conducted on a Cd- Pb polluted soil with six treatments including lime (L), peat (P), hog manure (M), lime and peat (LP), lime and hog manure (LM) and CK nearby a steel plant in Xinluo District Longyan city Fujian province. It showed: most treatments could improve soil pH, organic matter. Treatments L, LP, LM could significantly stimulate growth of paddy, peanut. Most treatments could significantly inhibit uptake of the heavy metals in paddy and peanut. Pb in rice was in accordance with the guide value. This experience showed that changing availability of heavy metals in soil by adjusting soil pH was main mechanism. The above results showed that organ- neutralization could inhibit uptake of Cd, Pb and adjusting soil nutrient.