城市污泥堆肥林地应用研究进展

Application of Urban Sewage Sludge Compost to Forestland

介绍了发达国家将城市污泥堆肥应用于林地改善土壤的微生物活动和数量 ,提高土壤的可利用性氮、磷、钾、有机质的含量以及促进林木的生长的研究状况 ,但污泥林地利用也存在污染地下水、增加土壤重金属和有害化学物质等环境风险。目前我国利用污泥方面的研究还比较少。同时建议 ,根据黑龙江省的实际情况 ,开展污泥堆肥应用于不同林地土壤条件下 ,对不同树种、林龄速生丰产林的施用量等方面的研究 ,为污泥在优质速生丰产林定向培育方面的应用 ,提供科学依据和技术支撑。

It has been a main method using sewage sludge compost in forestland in developed countries. Sewage sludge compost can increase activity and amount of forest soil microbe, improve the contents of available N, P and K, but on the other hand it may pollute the underground water with some heavy metals and noxious substances. There are few researches on this aspect in China. Aiming at the practical conditions of Heilongjiang province, it is suggested that researches on the applications of sewage sludge compost to different forest sites and fertilizer doses needed by fast-growing and high-yield plantations with different forest species and ages should be carried out, which can provide scientific basis and technological support for the application of sewage sludge compost to the oriental cultivation of fast-growing and high-yield plantations.