超高产夏玉米生长机制研究

Study on Growth Mechanism of Super-high Yield Summer Maize

１９９６－１９９７年的超高产夏玉米栽培试验研究表明，超高产夏玉米的最大叶面积指数可达５７左右，叶片的功能期长，叶面积４０以上的时间在６０ｄ以上，总光合势大，净同化率高。营养器官干物质积累的高峰期在吐丝后３０ｄ前后，吐丝前后的干物质积累比例约为４∶６，经济系数在４４％左右。研究还发现，黄淮海地区玉米生长季节的天气条件尤其是日照时间是影响玉米产量的重要因素。

In 1996-1997 field experiments were conducted to study the growth mechanism of super-high yield summer maize in Wenxian County,Henan Province.The resutls indicated that LAI,LAD and NAR of supper-high yield summer maize were higher than those of the normal,the DM accumulation of nutrition organ was the highest about 30 d after silking.It was also found that the yield of summer maize was mainly affect by the climate conditions especially the sunshine time,during growing season.