哈密第十三师农田土壤养分变化分析与肥力评价

发布时间：2019-03-21 08:34

【摘要】：【目的】调查哈密第十三师耕层土壤养分状况,分析耕层土壤养分现状,空间的分布特征及其演变趋势,开展地力评价,为高标准农田建设和合理施肥提供理论依据。【方法】对2012~2015年哈密第十三师耕层土壤养分进行采样和分析,并与1984年全国第二次土壤普查及2007年土壤养分历史资料进行对比,运用统计学方法分析第十三师耕层土壤养分现状和演变趋势。运用层次分析法分析计算各评价因素组合权重,用特尔斐法开展地力评价,通过不同土壤养分之间的相关性和变异性分析,明确哈密第十三师土壤养分的分布特征。【结果】哈密第十三师耕层土壤有机质平均值为14.5 g/kg,属四级水平;碱解氮含量平均值为87 mg/kg,属四级水平;有效磷含量平均值为15.39 mg/kg,属于三级水平;速效钾含量平均值为197 mg/kg,属于二级水平;从1984~2015年,耕地土壤有机质和有效磷含量呈下降趋势。土壤碱解氮和有效磷含量是升高趋势。土壤碱解氮和有效磷含量有升高的趋势。【结论】研究区土壤肥力整体状况较好,农田土壤有机质、碱解氮含量普遍中等偏低。速效磷含量中等偏上。速效钾含量较为丰富。
[Abstract]:[objective] to investigate the nutrient status of cultivated layer soil in the 13th Division of Hami, analyze the status quo of soil nutrient, spatial distribution characteristics and evolution trend, and carry out the evaluation of soil fertility. [methods] soil nutrients in the cultivated layer of the 13th division of Hami from 2012 to 2015 were sampled and analyzed, and compared with the second soil census in 1984 and the historical data of soil nutrients in 2007. The present situation and evolution trend of soil nutrients in the cultivated layer of the 13th Division were analyzed by statistical method. Analytic hierarchy process (AHP) was used to calculate the combined weights of the evaluation factors, and Delphi method was used to evaluate the soil fertility. The correlation and variability of different soil nutrients were analyzed by means of the method of analytic hierarchy process (AHP). The distribution characteristics of soil nutrients in the 13th division of Hami were determined. [results] the average value of soil organic matter in the cultivated layer of the 13th division of Hami was 14.5 g / kg, belonging to the fourth grade level. The average content of available nitrogen, available phosphorus, available potassium, available potassium and available potassium were 87 mg/kg, 15.39 mg/kg, and 197 mg/kg, respectively, and that of available phosphorus and available potassium belonged to the second level and the second level, respectively. From 1984 to 2015, the content of organic matter and available phosphorus in cultivated soil decreased. The contents of soil alkaline hydrolyzed nitrogen and available phosphorus are increasing trend. [conclusion] the soil fertility in the study area is better, the soil organic matter and the alkali-hydrolyzed nitrogen content in farmland soil are generally medium and low. [conclusion] the content of soil organic matter and available phosphorus in the study area are generally medium and low. The content of available phosphorus is middle and high. Available potassium content is relatively rich.
【作者单位】： 石河子大学农学院;新疆生产建设兵团第十三师现代农业投资公司;新疆生产建设兵团第十三师红星四场;新疆生产建设兵团第十三师农业局;
【基金】：国际合作专项“绿洲棉田生态环境监测与预警技术研究”(2015DFA11660)~~
【分类号】：S158
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本文编号：2444770