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一、引言水稻平均粒重在成熟时所达到的数值(包括空瘪粒)等于每穗总粒重与每穗粒数之比。前者主要决定于植株的光合产物总量,不同条件下每穗粒重与蘖总重的比例虽然稍有变化,但一般幅度不大;后者受很多内外条件的影响,不同密度下植株光合产物数量的不同,以及氮肥数量的不同影响尤其明显。由于每穗粒重与粒数受各种条件的影响不完全相同,二者的比例可以有相当大的变
I. INTRODUCTION The average grain weight at maturity (including empty shriveled grains) equals the ratio of total grain weight per panicle to grains per spike. The former mainly depends on the total amount of photosynthate produced by plants. The ratio of grain weight per panicle to total weight of tillers varies slightly under different conditions, but the latter is not affected by many internal and external conditions. The photosynthetic products The different quantities, as well as the different effects of the amount of nitrogen fertilizer, are particularly noticeable. As the grain weight per panicle and the number of particles under the influence of various conditions are not exactly the same, the ratio between the two can have a considerable change