谷子高产生理功能的研究

分析了谷子的主要生理性状。结果表明 :叶片和叶鞘的叶绿素含量以高肥、稀植含量高 ;生育时期以灌浆期含量高 ;单叶以剑叶、倒 2叶含量高。有效光合速率以开花期最大 ,剑叶光合速率最高。蒸腾速率表现为开花期最大 ,单叶以倒 2叶最大。气孔导度和细胞间隙CO2 浓度以抽穗期值较大 ,倒 2叶值最大。有效光合速率与千粒重、成粒重呈极显著正相关。气孔导度与穗码数关系密切 ,细胞间隙CO2 浓度与成粒重呈显著正相关。14 C代谢表明 ,植株各器官均有同化能力 ,叶片光合功能最强 ,同化物运往子粒最多 ,说明子粒是储存中心 ,而且在子粒形成期谷子具有“顶端定向供应”的特点。14 C同化物从叶片输出最多 ,叶鞘在抽穗期以储存为主 ,灌浆期大量输出达 97 2 5%。

Studies on High Yield Physiologies in Millet

Studies on plant type characters,physiologies were made in different millet varieties under field and pot groun conditions．The main results are as follows：chlorophyll of leaf and leaf sheath was higher in and the second leaves．Photosy thesis of flag leaf was high．Transpiration，stomatal conductance and CO2 between cells of the second leaf were large．Close relationships were found between photo_sythesis,1000_grain weight and weight of full grain．The14C_matter analysis showed that there were assimilation actions in all green parts．The photosynthesis of leaf was the biggest．The assimilation matter exported to grain was high（65．60％）．The14C_assimilation matter of leaf had more contribution to grain．The leaf sheath stored dry matter in heading.Leaf sheath exported dry matter（97．25％）in filling．