不同灌水處理農(nóng)田表層土壤密實(shí)度變化特征
[Abstract]:Nine monitoring data of soil density and moisture content were statistically analyzed and curve fitted by field experiment of drip irrigation under mulch in three different irrigation treatments. The change process of soil density with time was revealed during the whole growing period of maize in farmland surface soil, and the relationship between soil density and soil moisture content was also analyzed, and the relationship between soil compactness and soil moisture content was analyzed. The quantitative relationship between soil compactness and moisture content was analyzed. The results showed that the effect of irrigation process on soil compactness was great, and the density of topsoil increased obviously after irrigation, and the density of soil did not increase (or decrease) with the increase of irrigation quota. There is a quadratic function relationship between surface soil density and water content, and the correlation coefficient is 0.89 ~ 0.93. Therefore, further in-depth analysis of soil compactness with time and water content variation characteristics will be of great significance for rational and accurate irrigation in farmland and prevention and control of soil cementation.
【作者單位】: 甘肅省武威市中心灌溉試驗(yàn)站;甘肅省武威市水利技術(shù)綜合服務(wù)中心;
【分類號(hào)】:S2
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