渭北台塬区新增耕地土壤肥力评价—以陕西澄城县为例

发布时间：2018-01-18 02:32

本文关键词：渭北台塬区新增耕地土壤肥力评价—以陕西澄城县为例　出处：《中国土壤与肥料》2016年04期 　论文类型：期刊论文

【摘要】：采用层次分析法和权重对比法对渭北台塬区新增耕地土壤肥力的权重进行了分配,并对该区域土壤肥力做了进一步评价,提出了影响新增耕地土壤肥力的最大限制因素。结果表明:渭北台塬区澄城县新增耕地土壤肥力权重指标为p H值0.22,电导率0.03,有机质0.22,全氮0.22,有效磷0.15,速效钾0.10,质地0.06。澄城县土地整治项目新增耕地土壤肥力分值分布在38~66之间,平均值为54分,研究区总面积的90%为新增耕地,其土壤肥力综合分值在45~65分,有一半的新增耕地的土壤肥力分值在50~60之间,分值最高和最低的面积约占到5%和3%。造成土壤肥力指数低的主要因素是土壤有效磷(AP)、土壤有机质(SOM)、土壤速效钾(AK)、土壤全氮(TN)4项指标含量较低,其影响程度为APSOMAKTN。运用层次分析法与权重对比法相结合的方法在土壤肥力评价上取得了较好的效果,具有较好的应用前景。
[Abstract]:The weight of new cultivated land fertility in Weibei tableland was distributed by AHP and weight contrast method, and the soil fertility of this area was further evaluated. The results showed that the weight index of soil fertility in Chengcheng county was 0.22 and the conductivity was 0.03. Organic matter 0.22, total nitrogen 0.22, available phosphorus 0.15, available potassium 0.10, texture 0.06.The soil fertility score of the newly added cultivated land in Chengcheng County is between 38 and 66. The average value is 54, 90% of the total area of the study area is the new cultivated land, the comprehensive score of soil fertility is 45 ~ 65, and the soil fertility score of half of the new cultivated land is between 50 ~ 60. The areas with the highest and lowest scores were about 5% and 3.The main factors contributing to the low soil fertility index were soil available phosphorus (APN), soil organic matter (SOM), and soil available potassium (K). The content of TNN in soil was low, and its influence degree was APSOMAKTN. The method of AHP and weight contrast was used to evaluate soil fertility. It has good application prospect.
【作者单位】：陕西省土地工程建设集团陕西省土地工程技术研究院有限责任公司国土资源部退化及未利用土地整治工程重点实验室;
【基金】：国家科技支撑计划“山地丘陵区空心村整治关键技术集成示范”(2014BAL01B03)
【分类号】：S158
【正文快照】： 近年来,为了满足城市发展对土地的需要,我国提出了异地占补平衡政策,自推行以来,我国的新增耕地增幅异常明显,在实现耕地总量动态平衡的同时,补充耕地的质量越来越受到人们的关注。由于土地整治过程存在大量的土方堆垫,导致土体重构、养分贫瘠,土壤肥力状况不佳。因此,对土壤

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