夏玉米高产群体生理动态质量指标的研究

Physiological Index of Summer Corn High yield Cultivation

利用杂交种掖单22 号,研究了夏玉米高产群体生理质量指标。结果表明,在适宜的叶面积指数范围内,延长灌浆期叶片的功能期,尤其是吐丝30 d 以后的绿叶面积时间,是高产的根本保证;在提高干物质积累量的基础上,努力增加花后、尤其是吐丝后10 ～30 d 干物质积累量是实现高产的核心;最大伤流量与产量呈曲线关系,群体最大伤流量必须确保在适宜范围内。

Some physiological indexes for high yield cultivation of summer corn were studied with different population of variety “Yedan 22”. The results indicated that to extend the duration of leaf function at filling period especially the time of green leaf area at the period following 30 day after silking was essential to ensure high yield while leaf area index was within reasonable range. Based on increasing the dry matter accumulation of whole growing period, increased yield could be obtained mostly by increasing the amount of dry matter accumulation at 10 to 30 day period after flowering, especially after silking. There was a curevilinear relationship between the maximum bleeding amount and grain yield. So, to improve yield, the maximum bleeding amount should be maintained reasonable.