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对昆明西山的灰金竹林、慈竹林、实心竹林3种典型竹林地进行野外模拟降雨实验,研究不同竹林地下土壤表层N和P随降雨径流的迁移过程。结果表明:在相同降雨条件下,3种竹林地产流量、产沙量大小顺序均为慈竹林>灰金竹林>实心竹林;径流水相中悬浮颗粒态氮(PN)和悬浮颗粒态磷(PP)是氮、磷流失的最主要形态。整个降雨过程氮素流失以径流水相为主,而磷素流失以泥沙相为主;土壤表层氮、磷流失速率大小顺序均为慈竹林>灰金竹林>实心竹林,土壤浅层水源涵养功能最强的为实心竹林。
Field simulated rainfall experiments were conducted on three typical bamboo forests including Ash-gray bamboo forest, Ci-bamboo forest and solid bamboo forest in Xishan, Kunming, to study the migration process of N and P with rainfall-runoff in different bamboo forest soils. The results showed that under the same rainfall conditions, the order of flow and sediment yield of three kinds of bamboo forest were Ci Zhu-lin> Ash-gray bamboo> solid bamboo forest; suspended particulate nitrogen (NSP) and suspended particulate phosphorus ) Is the main form of nitrogen and phosphorus loss. The nitrogen loss in the whole rainfall process was dominated by runoff water phase, while the phosphorus loss was dominated by sediment phase. The order of soil nitrogen and phosphorus loss rates was Ci Zhu-lin> Ash-gray bamboo> solid bamboo and shallow soil water The most powerful for the solid bamboo forest.