凹型盖膜种植对坡地玉米生长发育的影响

Effects of concave mulching with polythene film on growth and development of corn growing in sloping land

为了比较两种盖膜方式对玉米生长发育影响的差异 ,1999～ 2 0 0 0年在昆明市寻甸县王家箐流域坡地进行了 5种耕种方式的玉米试验。结果表明 ,与传统的凸型盖膜种植一样 ,凹型盖膜种植能提高土壤温度 ,保持土壤水分 ,促进玉米生长发育 ,提早抽穗和成熟 ,改善作物穗部性状和经济性状 ,提高玉米产量。传统的凸型盖膜行间易积水 ,增大坡耕地径流 ,凹型盖膜则可减轻坡耕地水土流失 ;在凹型盖膜种植的基础上 ,结合前茬麦秆覆盖玉米行间 ,可补充土壤有机质含量 。

Corn trials of five different treatments were conducted on sloping land in Wangjia catchment,Xundian county,Kunming city from 1999 to 2000 The results showed as follows:comparing to the traditional convex mulching with polythene film,concave multhing was also able to increase heat and conservate water of soil,as a consequence,crop growth promotion and its yield increased Traditional convex polythene mulching increased runoff of sloping land due to water being collected between rows,while concave alternative showed the opposite On the basis of concave multhing,covering straw from previous wheat between rows could increase the organic matter content of soil,and improve sustainable productivity of crop in sloping land