峡江水利枢纽库区抬田土壤肥力及水分变化规律分析

发布时间：2018-06-12 19:36

  本文选题：多元结构 + 土壤肥力　； 参考：《中国农村水利水电》2017年03期

【摘要】：结合峡江水利枢纽工程建设中的库区抬田研究课题开展库区多元结构抬田土壤肥力及水分变化规律研究。通过四年的水稻种植试验结果分析表明:抬田示范区水稻耕作层的有机质、全氮、碱解氮、有效磷、速效钾含量指标大部分比未抬田对照区低,水稻土壤耕作层受到抬田影响,土壤养分含量在一定程度上有所降低,水稻生长所需土壤养分含量在一定程度上受到破坏。采取秸秆还田配合化肥施用后,土壤有机质含量得到了有效的改善,同时,也起到调节土壤中全氮和碱解氮的含量,培肥土壤的作用。其次,抬田区耕作层土壤的干容重较抬田前有所降低,田间持水率得到一定程度的提高,土壤结构性能得到了一定程度改善。
[Abstract]:Combining with the research project of raising farmland in the reservoir area in the construction of Xijiang water conservancy project, the study on soil fertility and water change law with multiple structures in the reservoir area is carried out. The results of four years' rice cultivation experiment showed that the contents of organic matter, total nitrogen, alkali hydrolyzed nitrogen, available phosphorus and available potassium in rice tilling layer were mostly lower than those in unlifted field control area, and the rice tilling layer was affected by rice tilling layer. The soil nutrient content was decreased to some extent, and the soil nutrient content needed for rice growth was destroyed to some extent. The organic matter content of soil was improved effectively by applying straw back to the field with chemical fertilizer. At the same time, the content of total nitrogen and alkali-hydrolyzed nitrogen in soil was regulated and the soil was fertilized. Secondly, the dry bulk density of cultivated layer soil was decreased, the water holding rate of field was improved to some extent, and the soil structure and performance were improved to some extent.
【作者单位】： 江西省灌溉试验中心站(江西省农业高效节水与面源污染防治重点实验室);
【基金】：江西省水利厅重大社会公益研究项目(KT201124) 峡江抬田水稻节水节肥高产技术研究(KT201321)
【分类号】：S158;S152.7
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本文编号：2010832