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小麦高产栽培中,只有单位面积穗数、每穗粒数、千粒重三者协调组合,才能获得理想的产量。其中穗数是高产的基础,当穗数达到一定限度,继办加,就会使群体的光合效能向反面转化。为了进一步高产,必须从提高每穗粒数和千粒重上下功夫,从改变个体发育环境上探索新的途径。几年来,我们通过穴播降低群体,促使个体充分发育,大大改善生育后期的光合环境,从而取得明显的增粒增重效果。这说明在关中地区改进栽培技术有促成大粒的可能性。为了更一步提高粒重,我们于
In high-yielding wheat cultivation, only the number of spikes per unit area, the number of grains per spike, the combination of 1000-grain weight in order to achieve the desired yield. Among them, panicle number is the basis of high yield. When the panicle number reaches a certain limit, following the increase of panicle number, the photosynthetic efficiency of the population will be reversely transformed. In order to further high-yielding, we must make efforts to improve the grain number and grain weight per spike, and explore new ways to change the environment of individual development. In the past few years, we have reduced the population by planting and sowing, promoting the full development of individuals and greatly improving the photosynthetic environment at the later growth stage, so as to obtain obvious effect of increasing grain weight and weight gain. This shows that improving cultivation techniques in Guanzhong area has the potential to promote large grains. In order to further improve grain weight, we at