滇池沿湖地区农田污染生态控制关键技术研究

A Study on Key Ecological Technology in Controlling Agricultural Non-Point Source Pollution along Coastal Areas of Lake Dianchi

针对滇池沿湖地区农田面源污染的特点,结合种植生产实际情况,在分析已有研究成果的基础上,按照源-流-汇系统控制的思路,在滇池沿湖地区开展了大颗粒肥料加工施用技术;生物覆盖保护性栽培技术;沟-基-塘系统三项试验研究。实验表明生态控制技术对农田地表径流污染综合负荷TN、TN、CODCr和SS的平均去除率分别达到54.14%～59.78%、66.86%～69.45%、42.20%～62.74%和48.83%～76.41%。生态控制技术的集成研究应用对于滇池沿湖地区生态农业发展和农田面源污染防控具有良好的作用。

Based on the current research results, taking into consideration of the characteristics of the agricultural non-point pollution around Lake Dianchi and the local cultivation practice, the three pilot studies are carried out, guided by the thinking of ＂source-stream-convergence＂ system control. That is, the application of the granulated fertilizer, the protective planting technology by biological coverage, and the ditch -base -pond system. It shows that the ecological control of the agricultural run-off pollution could make the removal rate of TN, TN, COD and SS reach 54. 14 - 59.78%, 66.86 - 69.45%, 42.20 - 62.74% and 48.83 - 76.41% respectively. The integrated ecological technology, when applied, could help control the agricultural pollution and promote the green agriculture around the lake.