农业环境科学学报2012，Vol.31Issue(6)：1104-1110,7.
有机无机配施对生菜生长及其Cd Pb含量的影响
Effects of Organic Manures on the Growth, Cd and Pb Concentrations of Lettuce Plant Based on the Same Nitrogen Level
摘要
Abstract
A pot experiment was conducted to investigate the effects of five organic manures (commercial manure, pig shit, cattle shit, hen shit, earthnut residue) and their application combined with chemical fertilizers (1/2 organic manure + 1/2 chemical fertilizers, the composition of chemical fertilizers were N:P2O5:K2O = 1:0.4:0.75) on the growth, Cd and Pb concentrations of lettuce(Lactuca satoiua) under the condition of the same N level(0.2 g·kg-1). The results showed that compared with the control, the organic manures increased the fresh biomass of L. saliva except for the treatment of only commercial manure. Hen shit had the highest fresh biomass among the single addition of organic manures, and cattle shit and hen shit had high fresh biomass among the organic manures combined with chemical fertilizers. The Cd and Pb concentrations of lettuce abovegrounds, significantly lower than those of lettuce roots, were below 0.05 mg·kg-1, 0.2 mg·kg-1which were the Chinese food limit, respectively. There was a significantly positive relationship between Cd concentrations in lettuce aboveground and root, but there was no significant relationship for Pb concentrations. No matter organic manures were applied alone or combined with chemical fertilizers, earthnut residue and hen shit had the lowest aboveground Cd concentration of L. saliva, and hen shit had the lowest lettuce aboveground Pb concentration. There was no significant difference for aboveground Cd or Pb concentrations of lettuce between single treatment and combined treatment of organic manure except for lower Pb concentrations of single treatments of pig shit and commercial manure than combined treatments, and that of combined treatments of cattle shit and earthnut residue than single treatments. Therefore, among the 5 tested organic manures, hen shit was the most suitable amendment for the soil contaminated by heavy metal because of its largest biomass, the lowest aboveground Cd or Pb concentration of lettuce, and invariable effect under the condition of single application or combination with chemical fertilizers.关键词
土壤/有机肥/无机肥/生菜/重金属污染Key words
soil/ organic manure/ fertilizer/ Lartucasaliva/ heavy metal pollution分类
农业科技引用本文复制引用
唐明灯,艾绍英,罗英健,李盟军,王艳红,曾招兵,姚建武..有机无机配施对生菜生长及其Cd Pb含量的影响[J].农业环境科学学报,2012,31(6):1104-1110,7.基金项目
广东省科学技术厅重大专项(2008A030202002) （2008A030202002）
广东省科学技术厅农业领域重点专项(2011A020101007) （2011A020101007）
广东省科学技术厅社会发展项目(2010B031800013) （2010B031800013）
广东省科学技术厅农业攻关项目(2011B020309003) （2011B020309003）
