玛纳斯县农田土壤养分变化分析

土壤性质的空间变异对于揭示各项养分的分布规律，实行特定的田间管理措施和实施精确农业有重要意义。文章对照分析了1982年和2012年玛纳斯县农田表层土壤有机质、碱解氮、有效磷、速效钾及 pH 的时空变化情况。结果发现30年来研究区土壤养分表现出一定的空间变异性，有机质、碱解氮、有效磷、速效钾含量及 pH 值变化明显，各项等级均有增长，其中有机质和有效磷的变异系数最为明显，玛纳斯县研究区域养分总体含量由20世纪80年代的“缺氮少磷富钾”变为目前的“平氮平磷富钾”。

Change Analysis of Soil Nutritions in Manas

The spatial variabilitys of soil have significance influence to reveal the distribution of the va-rious nutrients properties and develop specific field management measures and implementing precision agri-culture .This article comparative analyzes the nutrition change in temporal and spatial variation between 1982 and 2012 in manas farmland topsoil ,including soil organic matter ,alkali-hydro nitrogen ,effective phosphorus , rapidly - available potassium and pH .The results indicate that during 30 years soil nutritions in the study area showed a certain spatial variability change of organic matter ,alkali solution ni-trogen ,effective phosphorus ,rapidly -available potassium content and pH value ,each of nutrition’s level has growed ,the variation coefficient of organic matter and effective phosphorus is most obvious .Overall , the content of general nutrient in Manas research area by the 1980 is the＆quot;lack of phosphorus and nitrogen potassium rich ＆quot;into the ＆quot;average nitrogen and phosphorus ,potassium rich＆quot;.