高粱不同品种茎、叶形态生理指标比较研究

Comparartive Studies On Leaf and Stem Characters of Different Sorghum Varieties

对8个高粱杂交种的茎、叶的形态生理指标进行比较。以7050A、9198亲本系组配的杂交种茎粗系数较大,抗倒伏性强,利于稳产。高粱单株叶面积生长呈"S"形曲线发展。单株和群体叶面积发展经历了四个时期:指数增长期、直线增长期、稳定期和下降期。抽穗开花期,叶面积达到最大值。

The comparative studies were made between the morphological characters and physiological functions in leaf, stem, leaf sheath and panicle in 8 sorghum hybrids. The hybrids with 7050A or 9198 showed bigger coefficient in stem diameter, and performed good antilodging and yield stability. The growth of sorghum leaf showed Scurve. There were four stages of leaf growth in plant or in population: index growth, straight line growth. stable growth and decline growth. Leaf area got to the Maximum from late. Tasseling to late milky maturity.