早稻旱育秧秧苗生理特性及其增产效应

Effects of the Yield and the physiological Characteristics of Unflooded seedling of Early Rice.

本文对早稻旱育秧的生理特性和增产效应进行了研究,结果表明早育秧苗可提高秧苗素质,增加秧苗光合作用和呼吸作用,提高秧苗根系活力和叶片可溶性糖含量,在低温条件下,可降低电解质外渗率,因而具有较强抗寒能力,早育秧秧苗在本田期表现出促蘖增穗和提高开花期后光合速率的效果,它比半旱湿润秧苗每公顷增产1336.5kg。

The paper descrides the studies on the effects of the yield and the physiological characteristics of unflooded seedling of early rice. Bred by using the technique of unflooded seedling, thd seedling quality and rooting viability were promoted, thd photosynthetic rate and respi-ratory rate and content of soluble sugar(%DW) in leaf blade etc. were increased, however, the electorolyte leakage ( % ) were decreased under the low-temperrature condition, therefore the chilling resistance was increased, effects of unflooded seedling in promoting tillering and ear forming wered significant under the field culture condition and the photosynthetic rate was increased after the flowering period, so that as compared with the semidry-humid raising, the yield per ha increased by about 1336. 50kg.