Abstract: A systematic study on the growth, development, dry matter production and partition of maize sowing in different seasons were made in the town of Caoba of Mengzi in 1996-1997.The results are as follows:1. The growth duration of winter maize is 171 days, the summer maize growth duration is only 101 days.2.Spring maize produced more dry matter after silk. There is a an direct correlation between the amount of dry matter production and the product of sunshine-hour multiplied by the leaf area index.

Key words: South subtropical region

摘要： 1996～1997年,在蒙自草坝对春、夏、秋、冬四季玉米的生长发育和干物质生产与分配进行了系统研究,结果表明:1.冬玉米生育期最长达171天,而夏玉米只有101天.2春玉米花丝期前生产了较多的干物质,其它的则是花丝期后生产的干物质更多,干物质生产最与日照时数和LAI的乘积正相关.3.灌浆期籽粒重占总增重的比例与各季玉米灌浆期≥10℃的积温正相关.4.春玉米籽粒生产除灌浆期的光合产物外,动用了前期贮存物的11.l%,其他玉米完全依赖于灌浆期的光合产物,并有不同比例光合产物贮存于营养体中.说明春玉米的产量受限于灌浆期的光合产物,其它玉米则受库容小或运输不畅的限制.

关键词: 南亚热带地区, 不同季节播种玉米, 生长发育, 干物质生产与分配