黄土高原毛白杨、刺槐人工林对土壤养分的影响

研究不同人工造林对土壤养分的影响,为人工林丰产管理及地力衰退评价提供理论依据。以黄土高原8年生毛白杨、刺槐人工林为研究对象,通过调查和SPSS分析,比较了2种人工林对土壤速效养分的影响。结果表明,2种人工林对土壤速效氮、速效钾含量影响差异显著(P<0.05),对速效磷含量影响差异不显著(P>0.05),毛白杨人工林土壤速效氮、速效钾含量较同等条件刺槐人工林低,而速效磷含量较刺槐林略高。表明营造2种人工林后,毛白杨林整体肥力明显低于刺槐林,并表现为土壤质量中度退化,距树干基部越近这种差异性表现越明显。

Impact on Soil Nutrient of Populus tomentosa andRobinia pseudoacaia Plantations in Loess Plateau

Impacts of different plantations on the soil nutrients were examined to provide theoretical basis for the high-yield plantation management and evaluation of soil degradation.Eight year-old Populus tomentosa and Robinia pseudoacacia plantations were adopted as study objects,through the investigation and the SPSS data analysis to compare the impacts on soil available nutrients of the two plantations.The results showed that there were significant differences(P<0.05) of soil available N and K contents between t...