不同灌水处理农田表层土壤密实度变化特征
发布时间：2019-04-22 12:17
【摘要】：通过3种不同灌水处理玉米膜下滴灌大田试验,对土壤密实度与含水率的9次监测数据进行统计分析和曲线拟合,揭示了玉米全生育期农田表层土壤密实度随时间的变化过程,分析了土壤密实度与含水率间的数量关系。结果表明:灌水过程对土壤密实度影响较大,灌水后表层土壤密实度明显增大;土壤密实度不随灌水定额增大而增大(或减小);表层土壤密实度与含水率之间存在一定的二次函数关系,且相关系数为0.89~0.93。因此,进一步深度分析研究土壤密实度随时间和含水率的变化特征,这将对农田合理精准灌溉和防治土壤板结具有重要意义。
[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.
【作者单位】： 甘肃省武威市中心灌溉试验站;甘肃省武威市水利技术综合服务中心;
【分类号】：S2
本文编号：2462825
[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.
【作者单位】： 甘肃省武威市中心灌溉试验站;甘肃省武威市水利技术综合服务中心;
【分类号】：S2
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