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，干物质生产量与日照时数和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１１．１％，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。
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 flo- lows: 1.The growth duration of winter is 171 days, the summer maize growth duration is only 101 dsys. 2.Spring maize produced more dry matter before silk than after silk than after silk,conversely,the in other sowing seasons maize more dry matter ac sac. 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.3.At grain filling pe- riod ,there is an direct correlation between≥10℃ accumulated temperature and the percentage of grain weight accounting for total increasing weight.4.Besides the photosynthate produced at grain filling stage,the grain production for spring maize present 11.1％ of the store substance produced before silk,but during oth- er sowing seasons are depend completely upon the carbohydrate produced at filling stage,and a different proportion of carbohydrate remains in the vegetative organs.The results show that carbohydrate produced at filling is a limiting factor for the yield of spring maize, but for the other sowing seasons maize,the high yield usually is limited by a small or hindered transportation.
出处
《云南植物研究》
CSCD
北大核心
2001年第2期243-250,共8页
Acta Botanica Yunnanica
基金
云南省"九五"科技攻关
中科院-云南省科技合作项目(95A7-2)。
关键词
南亚热带地区
播种季节
生长发育
干物质生产
营养分配
South subtropical region
Maize sowing in different season
Growth and development
Dry matter production and partition
