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本文研究了红莲华矮15不育系配制的六个早釉杂交水稻组合及三系的生育期和不同发育时期的某些生理特性,结果表明:六个杂交水稻的生育期为103—121天,宜于双季稻区作早稻栽培。生育期的长短主要足受恢复系(父本)的影响大,在选育新的杂交水稻组合如要求适宜的生育期,则恢复系生育期的选择特别重要。生长和生理特性的研究表明:发育前期根系代谢强盛,表现为伤流强度、α-萘胺氧化值和根部吸收 ~(32)P 的量都要高于其亲本三系。茎杆和剑叶的干物质含量、主茎上部三片叶的叶面积等均表现为超亲。净光合强度和叶片中的含氮量都显示出优势。在不同的生育时期,杂种的呼吸强度略低于亲本三系,乙醇酸氧化酶活性也要低于其亲本三系,这些生理特性可以作为高产的生理指标。文中根据杂交水稻插单苗的秘型进行了分析,提出生育期短的杂交水稻在生产栽培中,每蔸不足插一苗,而是三苗左右,这样可利用杂交水稻分蘖习性强和叶面积指数大的特点,通过群体内部调节,减少高节位的弱小分蘖成穗,以达到提高结实率的目的。
In this paper, we studied the combination of six early-glaze hybrid rice combinations and some physiological characteristics at different developmental stages. The results showed that the growth period of six hybrid rice was 103-121 Day, suitable for early rice cultivation in double cropping areas. The length of the growth period is mainly affected by the restoring line (male parent), and the selection of the new hybrid rice combinations is particularly important when the appropriate growing period is required. Growth and physiological characteristics of the study showed that: the early development of strong root metabolism, manifested as injury strength, α-naphthylamine oxidation and the amount of roots absorbed ~ (32) P were higher than the three lines of their parents. Stem and flag leaf dry matter content, the main stem of the top three leaves of the leaf area showed super-pro. Both net photosynthetic intensity and nitrogen content in leaves showed an advantage. At different stages of reproduction, the respiratory intensity of the hybrids was slightly lower than that of the parents, and the activity of glycolate oxidase was also lower than that of their parents. These physiological characteristics could be used as physiological indicators of high yield. In this paper, the hybrid rice rice seedlings permutations were analyzed, suggesting that short growing period of hybrid rice in the production and cultivation, lack of planting a seedling per plant, but about three seedlings, which can be used hybrid rice strong tillering habits and leaf area Index of large features, through the internal regulation of groups to reduce the high node tilting tillers to the weak, in order to achieve the purpose of improving the seed setting rate.