目前,杂交水稻在粮食生产上占有重要地位。但在大面积生产中发现杂交稻组合之间表现的优势很不平衡,有的组合生育后期青秆黄熟,生长健壮;而有些组合则易于发生早衰,空秕率高达2～40%,严重影响产量优势的发挥。本试验应用已知的早衰杂交组合V_(49)和后健组合V_(35)进行形态和生理的比较,以探讨早衰的生理机理,寻求预防早衰的有效途径,并为育种工作提供预测早衰的生理指标。 At present, hybrid rice occupies an important position in food production. However, in large-scale production, it is found that the performance of hybrid rice combinations is imbalanced. In some combinations, the green stalk is ripe and grows well at the later growth stage. In some combinations, premature aging is easy to occur and the rate of empty stools is as high as 2-40% Yield advantages of play. In this study, morphological and physiological comparisons were made between the premature decoction combination V_ (49) and the postnatal combination V_ (35) to explore the physiological mechanism of premature aging and find effective ways to prevent premature senility. Physiological indicators.