摘要
通过对渭南市临渭区耕地中301个样地土壤养分进行取样分析发现:pH呈中性偏碱,有机质总体水平较高,碱解氮含量整体较缺乏,有效磷中等水平和丰富等级的比例大,且空间差异大,速效钾含量很丰富;各养分变异程度为pH<速效钾<有机质<碱解氮<有效磷。与全国第二次土壤普查临渭区耕地土壤养分含量比较,全区pH变化很小;有机质增幅较大,并还有一定上升空间;碱解氮增幅明显;有效磷增幅超200%,土壤中磷元素累积显著,速效钾为负增长。
The soil nutrients in302plots of farmland in Linwei District was analyzed that the pH was moderately alkaline,the overall level of organic matter was relatively high,the content of available nitrogen was lack,the ratio of available phosphorus was big,the space difference was big,the content of available potassium was very rich,and the variation degree of each nutrient is pH<available potassium<organic matter<basic nitrogen<effective phosphorus.Compared with the soil nutrient content in Linwei district of the second national soil census,the change of pH in the whole region was very small,the organic matter was increased more and also has room for improvement,and nitrogen was increased significantly.The content of available phosphorus was increased more than200%,and phosphorus accumulation in soil was significant,while available potassium was negative growth.
作者
胡明
HU Ming(School of Chemistry and Material Science, Weinan Normal University, Weinan 714099, China;Key Laboratory for Eco-Environment of River Wetlands in Shaanxi Province, Weinan 714099, China)
出处
《渭南师范学院学报》
2018年第24期56-60,共5页
Journal of Weinan Normal University
基金
渭南师范学院自然科学类研究项目:渭北旱塬土壤养分时空变异与养分平衡现状分析(17YKS17)
渭南师范学院特色学科建设项目:秦东化工
材料技术调查(2014TSXK004)
关键词
耕地
土壤养分
养分含量
cultivated land
soil nutrient
nutrient content
