云南南亚热带北缘地区稻田亩产吨粮的种植模式及其生态生理学研究

Cropping system and its ecophysiological study for one ton grain produced per mu in rice field of Yunnan South Subtropical Region

1996～ 1 999年 ,在云南省蒙自县草坝镇 (南亚热带北缘 )进行了亩产吨粮的种植模式研究。通过对春、夏、秋、冬播玉米 ,早、中、晚稻以及冬小麦的系统研究 ,以地上部分总干物重、籽粒产量、总入射辐照量、叶面积持续期 (灌浆期 )、氮肥的利用率和生产力、水生产力为指标 ,对早稻—晚稻、早稻—秋玉米、早稻—冬小麦、春玉米—晚稻、夏玉米—冬小麦、中稻—冬小麦和中稻—冬玉米 7种复种模式作了比较 ,选出中稻—冬玉米为一年两熟亩产吨粮的最佳种植模式。

During 1996～1999, the growth systems of one ton grain producted per mu(one mu=666 7 m 2) were studied at Caoba town in Mengzi county of Yunnan province. Spring corn, summer corn, autumn corn, winter corn, early rice, mid-rice, late rice and winter wheat were studied systematically. Basing on dry matter weight of above ground part, grain yield, total incident radiation amount, leaf area duration(filling stage),productivity and utilization of N, water productivity,the following 7 cropping systems of early rice—winter wheat, early rice—autumn corn, early rice—winter wheat, spring corn—late rice, summer corn—winter wheat, mid-rice—winter wheat and mid-rice—winter corn were compared and the mid-rice—winter corn was selected as the best cropping system for one ton grain produced per mu of two crops in a year in south subtropical region of Yunnan.