养殖废水灌溉对玉米地土壤水溶性碳及其剖面分布的影响

发布时间：2018-03-29 02:34

本文选题：养殖废水灌溉　切入点：土壤总有机碳　出处：《灌溉排水学报》2017年02期

【摘要】：为了研究养殖废水灌溉对土壤水溶性碳量及其占总有机碳量比例的剖面分布的影响,设置水质和灌溉量处理,测定了玉米地土壤总有机碳和水溶性碳量,分析了水溶性碳占总有机碳比例及其剖面分布特征。结果表明,总有机碳及水溶性碳量在土壤表层较高,且随着土层加深均有所减少。养殖废水灌溉条件下的土壤总有机碳和水溶性碳量总体上比清水灌溉处理的高,这说明在一定范围内养殖废水灌溉更有利于土壤中有机碳量的增加。清水灌溉条件下,灌水量为640 m~3/hm~2时土壤总有机碳量最高;灌水量为760 m~3/hm~2时水溶性碳量最高。养殖废水灌溉条件下,灌水量为880 m~3/hm~2时土壤总有机碳和水溶性碳量均为最高。由于土壤中的总有机碳在土壤深层分布较少,且随土层加深土壤总有机碳量下降幅度减小,水溶性碳占总有机碳的比例随土层深度加深而逐步增加。养殖废水灌溉有利于土壤总有机碳、水溶性碳量的增加,并可促进二者在土壤表层的积累。
[Abstract]:In order to study the effect of wastewater irrigation on soil water soluble carbon and its distribution in profile of total organic carbon, the total organic carbon and water soluble carbon in cornfield soil were determined by water quality and irrigation treatment. The ratio of water soluble carbon to total organic carbon and its profile distribution were analyzed. The results showed that the total organic carbon and water soluble carbon were higher in the surface layer of soil. The total organic carbon and water soluble carbon of soil under the irrigation condition of aquiculture wastewater were higher than that of clean water irrigation. The results showed that the irrigation of aquiculture wastewater was more favorable to the increase of soil organic carbon in a certain range. Under the condition of clear water irrigation, the total organic carbon content of the soil was the highest when the irrigation amount was 640 mm ~ 3 / hm ~ 2; The water soluble carbon content was the highest at 760mg / hm-2. Under the irrigation condition of aquiculture wastewater, the total organic carbon (TOC) and the water-soluble carbon (WSC) were the highest at 880mg / hm-2, because the total organic carbon in the soil was less distributed in the deep soil. The ratio of water-soluble carbon to total organic carbon increased gradually with the deepening of soil depth, and the irrigation of culture wastewater was beneficial to soil total organic carbon and water soluble carbon. And can promote the accumulation of both in the soil surface layer.
【作者单位】：河海大学水利水电学院;
【基金】：国家自然科学基金青年项目(51209065) 中央高校科研业务费(2014B06114) 河海大学水利学科专业国家级实验教学示范中心创训项目
【分类号】：S273;S153

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