荒漠绿洲区不同土地利用方式下土壤养分差异分析

以塔里木盆地北缘荒漠绿洲区(渭干河—库车河三角洲绿洲)为研究对象,对耕地、林地、荒漠灌丛和盐碱草地利用方式下的土壤有机质、全氮、碱解氮、有效磷和速效钾进行了测定及统计分析。结果表明:土壤各养分元素的空间变异性由强到弱的顺序依次为有效磷碱解氮速效钾全氮有机质;不同土层深度有机质、全氮、有效磷和速效钾含量在不同土地利用方式之间表现出显著的差异(P0.05),土壤碱解氮含量无显著差异(P0.05);不同土地利用方式有机质与全氮、碱解氮之间的相关性较强,有效磷与速效钾之间的相关性相对较弱。

Analysis on soil nutrients difference under different land use patterns in desert oasis region

In northern tarim basin desert oasis region (Weigan-kuqa river delta oasis)as the research object, through the field sample collection and indoor analysis,soil nutrient elements of different land use patterns(organic mat-ter,total nitrogen,alkali solution nitrogen,available phosphorus and available potassium)were analyzed,the results show that:(1)the spatial variation of the soil nutrient elements from strong to weak order of sequence is available phos-phorus>alkali solution nitrogen>available potassium>total nitrogen>organic matter.(2)under the different soil depth,the contents of soil organic matter,total nitrogen,available phosphorus and available potassium showed more sig-nificant difference between the different land use patterns(P<0 .05),while soil alkali solution nitrogen was no signifi-cant difference between the different land use patterns(P>0 .05).(3)Under the different patterns of land use,the re-lationships of correlation were strong between the soil nutrient index of organic matter,total nitrogen and alkali solution nitrogen .The relationship of correlation between the available phosphorus and available potassium was relatively weak .