發(fā)布時間：2018-06-12 19:36

  本文選題：多元結(jié)構(gòu) + 土壤肥力�。� 參考：《中國農(nóng)村水利水電》2017年03期

【摘要】：結(jié)合峽江水利樞紐工程建設中的庫區(qū)抬田研究課題開展庫區(qū)多元結(jié)構(gòu)抬田土壤肥力及水分變化規(guī)律研究。通過四年的水稻種植試驗結(jié)果分析表明:抬田示范區(qū)水稻耕作層的有機質(zhì)、全氮、堿解氮、有效磷、速效鉀含量指標大部分比未抬田對照區(qū)低,水稻土壤耕作層受到抬田影響,土壤養(yǎng)分含量在一定程度上有所降低,水稻生長所需土壤養(yǎng)分含量在一定程度上受到破壞。采取秸稈還田配合化肥施用后,土壤有機質(zhì)含量得到了有效的改善,同時,也起到調(diào)節(jié)土壤中全氮和堿解氮的含量,培肥土壤的作用。其次,抬田區(qū)耕作層土壤的干容重較抬田前有所降低,田間持水率得到一定程度的提高,土壤結(jié)構(gòu)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.
【作者單位】： 江西省灌溉試驗中心站(江西省農(nóng)業(yè)高效節(jié)水與面源污染防治重點實驗室);
【基金】：江西省水利廳重大社會公益研究項目(KT201124) 峽江抬田水稻節(jié)水節(jié)肥高產(chǎn)技術研究(KT201321)
【分類號】：S158;S152.7
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本文編號：2010832