论文部分内容阅读
作者1983-1986年进行威优35,威优64、威优437的田间试验和生产调查,探讨杂交早稻高产潜力与技术。一、光能利用与物质生产:威优64生长快,叶面积大,净光合率高,穗干重大,但较分散,乳熟期群体生产结构较7944差,抽穗后干物质日增重高。物质分配与物质运转:抽穗后12天内籽粒灌浆靠茎、鞘贮藏养分转运;12天后靠冠叶光合产物。威优64茎、鞘养分转运率高,但其占籽粒总干重率低,其原因是抽穗后光合率高。二、颖果发育与籽粒灌浆: 杂交稻弱势颖花比率大于常规稻,弱势
The authors conducted field trials and production surveys of Weiyou 35, Weiyou 64 and Weiyou 437 from 1983 to 1986 to investigate the potential of high yielding hybrid rice and its technology. First, the use of light energy and material production: Weiyou 64 fast growth, large leaf area, high net photosynthetic rate, spike dry major, but more dispersed, dairy millet group 7944 poor production structure, increasing day after heading high dry weight . Material distribution and material movement: within 12 days after heading grain filling by stems, sheath storage and transport nutrients; by 12 days after the photosynthetic products. Wei You 64 stems, sheath nutrient transport rate, but its total grain dry weight rate is low, the reason is that after heading high photosynthetic rate. Second, the development of caryopsis and grain filling: Hybrid rice weaker than the regular rate of spike, underprivileged