摘要
小麦不同剪叶处理试验结果表明：（１）剪剑叶、倒二叶、倒三叶３处理的灌浆期物质生产量分别较对照降低１６．２４％、１５．４１％、１１．６９％；（２）剪叶处理后由于净同化率的提高，对灌浆期的物质生产有一定的补偿作用，净同化率的提高幅度为１０％～１５％；（３）剪叶处理对灌浆速率有不同程度的影响，进而影响了单穗籽粒重，剪剑叶、倒二叶、倒三叶３处理的单穗籽粒重分别较对照降低３３．６４％、２４．８６％、１７．７０％，三叶全剪处理的单穗粒重较对照降低４２．６９％；（４）剪叶处理在影响灌浆期物质生产的同时，影响灌浆期物质向籽粒的运输是导致籽粒产量下降的共同因素。
The results of experiment with different leaf-cutting treatments were as follows. (1)The dry matter production after heading in the three leaf-cutting treatments withflag leaf, 2nd top leaf or 3rd top leaf cut off was decreased by 16.24%, 15. 41 % or 11.69%,respectively,compared to the CK. (2)The net assimulation rate was increased by 10% -15 %through leaf-cutting treatments,so leaf-cutting had a little compensating effect on dry matterproduction after heading. (3)The grain weight per panicle in the leaf-cutting treatments withflag leaf, 2nd top leaf or 3rd top leaf cut off was decreased by 33. 64%, 24. 86% or 17.70%,respectively,because of the decreasing effect on grain filling rate. (4)By leaf-cutting,the disadvantageous effect on dry matter production and transport to grains after heading was thecommon factor of decreasing grain yield.
出处
《上海农业学报》
CSCD
1999年第1期83-86,共4页
Acta Agriculturae Shanghai
关键词
小麦
叶片
剪叶
籽粒产量
灌浆期
Wheat
Leaf
Leaf-cutting
Dry matter production
Dry matter transport
Grain yield
