第四节产量形成与大田群体结构前面说过,作物产量形成的两个主要生理因素是叶面积与净同化率。在一定范围以内,叶面积指数增加,产量也会增加,但超过一定范围以后,由子净同化率的迅速下降,产量就不再增加,甚至减低。但是,如何来调节叶面积增加与净同化率下降之间的矛盾呢?在农业生产上,首先是通过先进的栽培技术来获得良好的大田群体结构。 Section IV Yield Formation and Field Population Structure As mentioned above, the two major physiological factors that form crop yields are leaf area and net assimilation rate. Within a certain range, the leaf area index increased and the yield increased. However, beyond a certain range, the sub-net assimilation rate dropped rapidly and output no longer increased or even decreased. However, how to regulate the contradiction between the increase of leaf area and the decrease of net assimilation rate? In agricultural production, the first step is to obtain good field population structure through advanced cultivation techniques.