论文部分内容阅读
以黄河三角洲滨海盐碱地柽柳、杜梨、盐柳、白蜡人工林为研究对象,未造林荒地为对照,对不同人工林的土壤养分、土壤酶活性进行测定,利用隶属函数分析法对不同人工林的土壤肥力进行综合评价。结果表明:与对照荒地相比,各人工林平均土壤有机质、铵态氮、硝态氮、有效磷、速效钾质量分数,分别提高了177.89%、76.47%、757.74%、32.76%、30.13%;土壤中磷酸酶、过氧化氢酶、脲酶、蔗糖酶活性,比对照荒地分别提高了47.09%,11.52%,41.07%,76.00%;土壤肥力综合评价分值,从大到小依次为白蜡(0.777)、杜梨(0.694)、柽柳(0.572)、盐柳(0.436)、荒地(0.030)。
In this paper, the tillage, pear, salix and white wax plantation in coastal saline-alkali soil of the Yellow River Delta were used as the research objects, and the non-afforestation wasteland was taken as the control. The soil nutrient and soil enzyme activities of different plantations were determined. Using the membership function analysis method, Comprehensive evaluation of soil fertility. The results showed that the average mass fraction of soil organic matter, ammonium nitrogen, nitrate nitrogen, available phosphorus and available potassium were all increased by 177.89%, 76.47%, 757.74%, 32.76% and 30.13% respectively compared with the control wasteland. The activities of phosphatase, catalase, urease and invertase in the soil were increased by 47.09%, 11.52%, 41.07% and 76.00% respectively compared with those in the control wasteland. The comprehensive evaluation scores of soil fertility, in descending order, were white wax (0.777 ), Pear (0.694), Tamarix (0.572), Salix (0.436), wasteland (0.030).