本文關(guān)鍵詞：渭北臺(tái)塬區(qū)新增耕地土壤肥力評(píng)價(jià)—以陜西澄城縣為例　出處：《中國土壤與肥料》2016年04期 　論文類型：期刊論文

  更多相關(guān)文章： 層次分析法 新增耕地 評(píng)價(jià)研究 限制因子 渭北臺(tái)塬區(qū)

【摘要】：采用層次分析法和權(quán)重對(duì)比法對(duì)渭北臺(tái)塬區(qū)新增耕地土壤肥力的權(quán)重進(jìn)行了分配,并對(duì)該區(qū)域土壤肥力做了進(jìn)一步評(píng)價(jià),提出了影響新增耕地土壤肥力的最大限制因素。結(jié)果表明:渭北臺(tái)塬區(qū)澄城縣新增耕地土壤肥力權(quán)重指標(biāo)為p H值0.22,電導(dǎo)率0.03,有機(jī)質(zhì)0.22,全氮0.22,有效磷0.15,速效鉀0.10,質(zhì)地0.06。澄城縣土地整治項(xiàng)目新增耕地土壤肥力分值分布在38~66之間,平均值為54分,研究區(qū)總面積的90%為新增耕地,其土壤肥力綜合分值在45~65分,有一半的新增耕地的土壤肥力分值在50~60之間,分值最高和最低的面積約占到5%和3%。造成土壤肥力指數(shù)低的主要因素是土壤有效磷(AP)、土壤有機(jī)質(zhì)(SOM)、土壤速效鉀(AK)、土壤全氮(TN)4項(xiàng)指標(biāo)含量較低,其影響程度為APSOMAKTN。運(yùn)用層次分析法與權(quán)重對(duì)比法相結(jié)合的方法在土壤肥力評(píng)價(jià)上取得了較好的效果,具有較好的應(yīng)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.
【作者單位】： 陜西省土地工程建設(shè)集團(tuán)陜西省土地工程技術(shù)研究院有限責(zé)任公司國土資源部退化及未利用土地整治工程重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家科技支撐計(jì)劃“山地丘陵區(qū)空心村整治關(guān)鍵技術(shù)集成示范”(2014BAL01B03)
【分類號(hào)】：S158
【正文快照】： 近年來,為了滿足城市發(fā)展對(duì)土地的需要,我國提出了異地占補(bǔ)平衡政策,自推行以來,我國的新增耕地增幅異常明顯,在實(shí)現(xiàn)耕地總量動(dòng)態(tài)平衡的同時(shí),補(bǔ)充耕地的質(zhì)量越來越受到人們的關(guān)注。由于土地整治過程存在大量的土方堆墊,導(dǎo)致土體重構(gòu)、養(yǎng)分貧瘠,土壤肥力狀況不佳。因此,對(duì)土壤

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