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我局在一九七七年上半年种植了1.72亩矮优一号高产试验田,共收干谷2436斤平均亩产1413斤。为今后在我县推广杂交水稻积累了经验。杂交水稻有明显的根系、分蘖和穗粒优势,这些性状对创造高额单位面积产量是很有利的。但是杂交水稻还存在着群体成穗率低,空秕谷多、易感病招虫的缺点。因此如何创造条件,充分发挥和合理利用杂交水稻的优良特性,避免和控制其不利因素,使群体和个体,穗数、粒数和粒重之间最好地协
In the first half of 1977, our bureau planted 1.72 mu of high-yield trial crop of Dwarf No.1 and received a total of 2,436 kg of mu per mu of 1413 kg of dry land. In the future in our county to promote hybrid rice has accumulated experience. Hybrid rice has obvious root, tiller and spike advantages, which are good for creating high yield per unit area. However, the hybrid rice also has the shortcomings of a group of spike rate, empty valley and more susceptible disease-ridden insects shortcomings. Therefore, how to create conditions, give full play to and make good use of the excellent characteristics of hybrid rice, avoid and control its unfavorable factors, make the best between the groups and individuals, the number of spikes, grain number and grain weight