摘要： 对不同类型的高产品种灌浆期灌层结构光辐射特征进行研究,并对灌层结构与产量各因素进行相关分析。结果表明:各高产品种在开花期也就是灌浆前期叶面积指数(LAI)最高,之后逐渐下降;平均叶倾角(MFIA)总趋势是先增大后减少;叶片分布(LD)灌浆前期单位面积上叶片分布最多;透光系数(TR)随着灌浆生育进程逐渐增大;消光系数(K)在灌浆期随着角度的增大而增大;灌浆中期和末期的叶面积指数与产量和每穗粒数呈显著正相关,灌浆前期的平均叶倾角与千粒重呈显著负相关,因此,在今后的小麦高产育种中提高灌浆中期和末期的叶面积指数,适当降低灌浆前期的平均叶倾角对小麦高产和超高产具有重要的意义。

关键词: 高产, 灌浆期, 光辐射, 产量

Abstract: "This article researched the light radiation character on the different type high-yield variety wheat in grain filling time,and analysised the correlation on various factors of output and the canopy structure in grain-filling stage.The result indicated:The leaf area index(LAI) of various high-yield variety was highest at anthesis,afterward drops gradually;the general trend of the mean foliage inclination angle(MFIA) increased first,then reduced;The leaf blade distribution(LD) was the most in the preliminary unit of grain-filling;The transmission coefficient for radiation penetration(TR) increased gradually along with the grouting birth advancement;The extinction coefficient(K))enlarged in the grouting time along with the angle increasing;The leaf area index(LAI) of the middle and the last-filling stage were remarkable positive correlation with the output and the seeds per-spike,the mean foliage inclination angle(MFIA) in earlier period of grain-filling and 1 000-grain weight were remarkable negative correlation.Therefore,in high-yield wheat breeding,it was important to improve the leaf area index(LAI) in middle and last period of grain-filling and appropriatly reduce the mean foliage inclination angle(MFIA) in former stage of grain-filling."

Key words: Highyield, Grain-filling stage, Light radiation, Output

中图分类号: 

• S512.1