杂交早稻旱育秧生育特性及产量形成规律研究Ⅱ旱育秧物质生产和源库关系对产量的影响  

Study on the growth and development characters of dry nursery seedlings and their regularities of yield formation in early hybrid rice Ⅱ Effect of the assimilation metabolism and sink source relationship of dry nursery seedlings in its yield

作　　者：杨德光[1] 段志红[2] 刘承柳 李景文[1] 吴山[4] 

机构地区：[1]解放军农牧大学农学农机系,长春130062 [2]湖北省农业厅 [3]华中农业大学农学系 [4]湖北省襄樊市农业局粮油科

出　　处：《湖北农业科学》2000年第5期19-21,共3页Hubei Agricultural Sciences

基　　金：长江流域早杂协作组下达项目

摘　　要：以水育秧为对照 ,研究旱育秧干物质积累、分配和运转 ,源库关系以及对产量的影响。结果表明 :旱育秧高产的主要原因是在相同栽培条件下其单位面积的穗数较多 ;旱育秧高产的生理基础是其光合势大 ,干物质积累多 ,且在较高叶面积系数的前提下 ,粒叶比较高。但在本试验条件下旱育秧的干物质表观转变率低 ,导致其经济系数低 。The accumulation, distribution and transportation of assimilation, sink source relationship and their effect on yield were investigated by contrast to the paddy nursery seedling (PNS). The results indicated that: the yield of the dry nursery seedling (DNS) was higher than PNS' because of its more panicles per unit area. The physiological basis of its high yield was that the DNS plants had more assimilation and reasonably large grain; leaf rate even with large LAI. However, the DNS plants had low assimilation transportation rate resulting in a small harvest index that limited its yield potentiality.

关 键 词：杂交早稻 旱育秧 产量形成 物质生产 源库关系 

分 类 号：S511.310.1[农业科学—作物学]