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通过主因子分析方法,对黄河谷地拉西瓦片区耕地的土壤质量现状进行了综合分析评价。结果表明:青海东部黄河谷地拉西瓦片区耕地中,39个土壤剖面表层样点超过一半的土壤处于中等级水平(53.85%),15.38%的土壤处于良等级水平,25.64%的土壤处于较差等级水平,5.13%的土壤处于差等级水平;全氮含量和碱解氮含量是限制该地区土壤质量现状的主要因子。该地区土壤质量相对较差,在土壤改良中应注意有机肥及氮肥的施用。
Through the method of principal factor analysis, the present situation of soil quality of cultivated land in Laxi tile area of Yellow River valley was comprehensively analyzed and evaluated. The results showed that over 50% of the surface soil samples of 39 soil profiles were in the medium level (53.85%), 15.38% of the soil was in a good level and 25.64% of the soil was in a poor condition 5.13% of the soil is at a poor level. The total nitrogen and alkali-hydrolyzable nitrogen are the main factors that limit the status of soil quality in this area. The quality of soil in this region is relatively poor. In soil improvement, attention should be paid to the application of organic manure and nitrogen fertilizer.