桉农间作系统土壤养分特征

主要对桉树大宽行条带方式种植的三年生桉农间作试验地土壤进行取样分析。对土壤养分研究表明:间作甘蔗、木薯和牧草在提高土壤有机质方面差异不大,但是在提高土壤全量N、P、K以及速效N、P、K上,间作甘蔗和牧草要优于间作木薯。其中,间作甘蔗和间作牧草全P和全N差异明显,而全K则和对照林地基本持平,速效N、P、K与对照林地相比,都有明显提高。间作木薯以提高全P为主,速效N和速效P也有一定幅度提高。

Soil Fertility of Eucalyptus- crops interplant system

The paper mainly study the soil sample in the 3-year-old eucalyptus had cultivated woodland with broad strip mode.The results show: the model of intercropping sugarcane,cassava,or forage has little difference in improving soil organic matter,but the model of intercropping sugarcane or cassava is better than the model of intercropping forage in improving soil total nitrogen,total phosphorus,and total potassium and available soil nitrogen,phosphorus,potassium.Comparing with the control,the tow models intercropping sugarcane and cassava can improve distinctly the content of the soil total nitrogen and total phosphorus,and available soil nitrogen,phosphorus,potassium,but maintain the same level in the content of the soil total potassium;The model intercropping cassava mainly improve the soil total phosphorus,meanwhile the model can also improve the soil available nitrogen,phosphorus in a certain extent.