本文選題：土壤肥力 + 綜合評(píng)價(jià)��； 參考：《干旱區(qū)資源與環(huán)境》2017年10期

【摘要】：土壤肥力對(duì)于維持農(nóng)作物生長(zhǎng)和保障土地生產(chǎn)力具有重要意義。為綜合考慮土壤肥力評(píng)價(jià)中的模糊性和隨機(jī)性,引入云模型對(duì)西安市蔬菜區(qū)土壤肥力狀況進(jìn)行綜合評(píng)價(jià),選取pH值、有機(jī)質(zhì)、堿解氮、有效磷和速效鉀為評(píng)價(jià)指標(biāo),運(yùn)用主成分分析確定權(quán)重,利用逆向云、正向云算法獲得每個(gè)指標(biāo)的云模型;根據(jù)單指標(biāo)云模型特征值和權(quán)重值,結(jié)合綜合云算法得到土壤肥力綜合評(píng)價(jià)云模型。結(jié)果表明:西安市蔬菜區(qū)土壤養(yǎng)分總體上屬于中等偏高水平,有效磷、速效鉀含量偏高,堿解氮含量適中。土壤有機(jī)質(zhì)是土壤肥力的首要限制因素,在實(shí)際生產(chǎn)過程中應(yīng)注意增施有機(jī)肥,高磷、高鉀地區(qū)應(yīng)限制磷肥、鉀肥的使用,按需施用氮肥�？茖W(xué)評(píng)價(jià)土壤肥力有助于更加準(zhǔn)確地掌握土壤特性和養(yǎng)分狀況,精準(zhǔn)施肥,維持土壤養(yǎng)分平衡,提高土壤質(zhì)量。
[Abstract]:Soil fertility plays an important role in maintaining crop growth and ensuring land productivity.In order to comprehensively consider the fuzziness and randomness of soil fertility evaluation, a cloud model was introduced to evaluate soil fertility in vegetable and vegetable areas in Xi'an. The pH value, organic matter, alkali-hydrolyzed nitrogen, available phosphorus and available potassium were selected as evaluation indexes.Using the principal component analysis to determine the weight, using the reverse cloud, forward cloud algorithm to obtain each index cloud model, according to the single index cloud model eigenvalue and weight value, combined with comprehensive cloud algorithm to obtain a comprehensive evaluation cloud model of soil fertility.The results showed that the soil nutrients of vegetable and vegetable area in Xi'an were generally medium high, available phosphorus, available potassium and alkali-hydrolyzed nitrogen were on the high side.Soil organic matter is the primary limiting factor of soil fertility. In the actual production process, attention should be paid to increasing the application of organic fertilizer, high phosphorus and high potassium, limiting the use of phosphorus and potassium fertilizer, and applying nitrogen fertilizer as needed.Scientific evaluation of soil fertility is helpful to grasp soil characteristics and nutrient status accurately, maintain soil nutrient balance and improve soil quality.
【作者單位】： 西北大學(xué)城市與環(huán)境學(xué)院;西安市農(nóng)業(yè)技術(shù)推廣中心;西安市農(nóng)產(chǎn)品質(zhì)量安全檢驗(yàn)監(jiān)測(cè)中心;內(nèi)江師范學(xué)院地理與資源科學(xué)學(xué)院;
【基金】：教育部人文社會(huì)科學(xué)研究規(guī)劃項(xiàng)目(10YJA910010) 陜西省農(nóng)業(yè)科技攻關(guān)項(xiàng)目(2011K02-11) 西安市科技計(jì)劃項(xiàng)目(NC1402,NC150201) 西北大學(xué)"211工程"研究生自主創(chuàng)新項(xiàng)目(YZZ15013)資助
【分類號(hào)】：S158;S63

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