关中灌区农业土壤肥力的时空演化:以渭南市临渭区为例

Evolution of Agricultural Soil Fertility in Guanzhong Irrigation District:A case study of Linwei District in Weinan City

为探求区域土壤质量在可持续发展中存在的问题,了解土壤肥力的演变趋势,以期更好地为当地农业的稳定发展提供对策,对临渭区2010年耕地土壤肥力中的有机质和大量营养元素全氮、碱解氮、有效磷、速效钾等指标进行统计分析,并与1982年第二次土壤普查数据进行对比。结果表明:2010年临渭区土壤有机质、全氮、碱解氮、有效磷较1982年均有不同程度的提高,而土壤速效钾含量在1982年较丰富的基础上有一定幅度的下降,但仍处于较高水平。今后在农业耕种中应多注重土壤有机质的积累,以提高土壤整体质量,从而改善土壤肥力。

For studying the existing problems of regional soil quality oluring the sustainable development,understanding the evolution trend of soil fertility,and provide countermeasures for stably dereloping local agricalture preferably,the contents of organic manure,total nitrogen,available N,pand K in the farmlands in Linwei District in 2010 were analyzed and compared with that of the second soil survey date in 1982.The results showed that the contents of organic manure,total nitrogen,available N and available P were enhanced in varying degrees.The available K content showed a certain extent decrease,but it was still at a high level.The accumulation of organic manure in soil should be paid more attention to to enhance the soil quality and improre the soil fertility in future.