生活垃圾和污泥对土壤肥力及油菜生长的影响

通过盆栽试验研究了不同用量垃圾和污泥对土壤养分和油菜生长的影响。结果表明:施用3%、5%、8%的污泥和6%、8%、10%的垃圾,土壤有机质和速效N、P、K都显著高于对照,且随着用量的增大,效果增加。施用垃圾和污泥处理的油菜显著地比对照、施化肥处理生长旺盛,叶片大而绿,产量增加。测定各处理土壤中的重金属含量,其中Cr含量差异不显著,Pb、Cu差异显著,虽然施用不同用量垃圾和污泥不同程度地增加了土壤中重金属的含量,但都没有超出污染标准。因此,合理利用垃圾和污泥能提高土壤肥力,增加作物产量。

Effects of Municipal Household Garbage and Sewage Sludge on Soil and Brassica Campestris

In this pot experiment, the effects of municipal household garbage and sewage sludge on soil fertilityand Brassica campestris growth were studied. The results showed that the treatmentsof 3%、5%、8%sludge and 6%、8%、10%garbage significantly increased the contentsof soil OM and available N, P, and K. Brassica campestris grown in the treatments withsludge and garbage is much better than in control and the treatment with chemical fertilizers. The treatments withsludge and garbage hadhighercontent of heavy metal, but the content didn't reach the standard of pollution. So the rational utilization of garbage and sludge can improve soil fertilityand increase the output of brassica campestris.