关于杂交水稻秧苗素质与产量形成的内在联系,过去了解不多,1977年我们进行了一些生理测定。杂交水稻多蘖壮秧增产的原因,可从下列几个方面得到解释。 1.分蘖秧的生理素质较好。秧苗的生理素质,以移栽期单株总干重、根干重、叶面积和叶绿素含量的多少来衡量。测定的结果如表1。从表1可见,分蘖秧根系发达,利于吸收养分和水分;叶片叶绿素含量较高,利手光合作用,故干重大,生长较好。 2.分蘖秧移栽后发根力强,回青快,枯叶率低。移栽时把不同素质的秧苗各30株,全都剪去根系,单株植于本田,经五天 About the inherent relationship between quality and yield of hybrid rice seedlings, little was known in the past. In 1977, we carried out some physiological measurements. Multi-tiller seedling hybrid rice increased yield reasons can be explained from the following aspects. 1. Tillers seedlings better physiological quality. Physiological quality of seedlings, transplanting the total dry weight of the plant, root dry weight, leaf area and the amount of chlorophyll to measure. The results are shown in Table 1. As can be seen from Table 1, the developed root system of tiller seedlings is conducive to the absorption of nutrients and water; leaf chlorophyll content is higher, the hand photosynthesis, it is dry, good growth. 2. Tiller seedling transplanting strong hair, back to green fast, low rate of dead leaves. Transplanting different qualities of the seedlings of 30, all cut off the roots, planted in Honda, after five days