煤基腐殖酸和外源铜的小白菜效应研究

采用大棚盆栽试验,研究煤基腐殖酸和外源铜的小白菜效应。结果表明:施用一定浓度的铜可提高小白菜的产量,且小白菜体内的养分指标均有不同程度的提高。10号煤基腐殖酸对小白菜吸收重金属铜有显著的抑制作用,9号煤基腐殖酸也有一定的抑制作用,而6和11号煤基腐殖酸和EDTA对小白菜吸收重金属铜则有一定的促进作用。因此,9号特别是10号煤基腐殖酸可用于重金属铜污染土壤以降低重金属铜的生物毒害作用。而6和11号煤基腐殖酸可应用于重金属Cu污染土壤的植物修复方面,以提高修复的效果和效率。

Effect of Coal-based Humic Acids and Exogenous Cu on Pak-choi

A pot experiment in greenhouse was conducted to study the effect of coal based humic acids and exogenous Cu on pakchoi. The results indicated that application of certain concentrations exogenous Cu increased the yield and nutrient contents of pakchoi. The coal-based humic acids of No.10 significantly inhibited the absorption of pak-choi to Cu and the coal-based humic acid of No.9 also had a certain inhibition. The coal-based humic acids of No.6 and No. 11 promoted the absorption of pak-choi to Cu, as well as EDTA. Thus, the coal-based humic acid of No.9, in particular the coal-based humic acid of No.10 could be used to reduce the biological toxic effects of Cu in Copper contaminated soil. The coal-based humic acids of No.6 and No.11 could be applied to phytoremediation of soil contaminated with heavy metal Cu for enhancing the effectiveness and efficiency.