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一、引言每亩穗数、每穗粒数及粒重是构成水稻产量的三个因素,但在通常栽培的羣体条件下,随着每亩穗数的增加,每穗粒数及粒重将渐次降低,因此若能统一和协调三者关系,必将大大促进产量的提高。我国广大农民在长期生产实践中所积累的丰富经验表明,水稻的高产形成过程是壮苗到壮株,壮株到大穗,大穗到饱粒相互推移的过程。1958年全国农业劳动模范陈永康提出的单季晚梗“三黄三黑”叶色变化丰产经验,就是以土为基础,以苗为指标,以肥水技术为
I. INTRODUCTION The number of spikes per panicle, the number of grains per spike and grain weight are the three factors that make up the rice yield. However, under the conditions of normal cultivation, with the increase of spikes per mu, the number of grains per spike and grain weight Will gradually decline, so if we can unify and coordinate the relationship between the three, will greatly promote the improvement of production. The vast experience accumulated by our peasants in long-term production practice shows that the process of high-yielding of rice is the process of strong seedling to strong strain and strong strain to big spike and big spike to grain filling. In 1958, the national agricultural laborer model Chen Yongkang put forward the single season stems “Sanhuangsanghuang” leaf color change yield experience, that is, soil-based, seedlings as an indicator to fertilizer and water technology