本文選題：土壤 + 水分��； 參考：《農(nóng)業(yè)工程學(xué)報(bào)》2017年02期

【摘要】：針對(duì)目前植物油渣較少應(yīng)用于農(nóng)業(yè)生產(chǎn)的現(xiàn)狀,為探明植物油渣對(duì)土壤水分運(yùn)動(dòng)和土壤持水特性的影響,采用室內(nèi)一維土柱入滲試驗(yàn),以耕作層土壤為研究對(duì)象,定量摻混植物油渣,對(duì)比研究3種不同摻混深度(14、24和34 cm)條件下的土壤水分入滲特性,并對(duì)摻混油渣土壤的持水能力進(jìn)行分析。結(jié)果表明:1)Philip和Kostiakov入滲模型均可用于描述摻混油渣條件的土壤水分入滲特性及參數(shù)擬合(R~20.99);2)與純土相比,摻混植物油渣可有效減小累積入滲量和入滲速率,根層摻混油渣(34 cm土層)最大可分別減少累積入滲量和入滲速率約11.0%和41.7%;3)入滲結(jié)束時(shí)基于土壤剖面水分分布特征,土壤摻混植物油渣有利于提高土壤飽和含水率和根層土壤含水率,與純土相比分別提高約14.3%和11.3%,有效增強(qiáng)了土壤持水能力;4)土壤摻混植物油渣可增加黏粒和粉粒、降低砂粒含量。該研究可為農(nóng)田生產(chǎn)中植物油渣推廣奠定理論基礎(chǔ),同時(shí)為植物油渣的田間土壤改良及應(yīng)用提供參考。
[Abstract]:In order to find out the effect of vegetable oil residue on soil moisture movement and soil water retention, a one-dimensional soil-column infiltration experiment was carried out in laboratory, and the cultivated layer soil was taken as the research object in view of the present situation that vegetable oil residue is seldom used in agricultural production. The infiltration characteristics of soil water under three different mixing depths (1424 and 34 cm) were studied and the water holding capacity of the mixed oil residue soil was analyzed. The results showed that the infiltration characteristics of soil water and the fitting of the parameters of the two models can be used to describe the conditions of mixed oil slag.) compared with pure soil, the mixed vegetable oil residue can effectively reduce the cumulative infiltration amount and infiltration rate. The maximum amount of cumulative infiltration and infiltration rate were decreased by 11.0% and 41.7%, respectively, at the end of infiltration, based on the water distribution characteristics of soil profile. Soil mixed with vegetable oil residue can increase soil saturated water content and root layer soil moisture content, which is about 14.3% and 11.3% higher than pure soil, respectively, which can effectively enhance the water holding capacity of soil (4) soil mixed vegetable oil residue can increase clay and silt. Reduce sand content. This study can lay a theoretical foundation for the popularization of vegetable oil residue in farmland production and provide a reference for the field soil improvement and application of vegetable oil residue.
【作者單位】： 西北農(nóng)林科技大學(xué)水利與建筑工程學(xué)院;西北農(nóng)林科技大學(xué)旱區(qū)農(nóng)業(yè)水土工程教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51279167,51379173) 公益性行業(yè)(農(nóng)業(yè))科研專項(xiàng)(201503124) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(20120204110023)
【分類號(hào)】：S152.7

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