据湖南省贺家山原种场等几十个点的多年试验和大面积制种实践证明,杂交水稻制种时不割叶(指剑叶)比割叶,能显著提高千粒重,降低批粒率,增加实粒数,杂交种子可增产10—15%。但制种产量是农艺措施和外界条件通过亲本个体与群体经其自身综合平衡后,以异交结实来实现的。因此,紧紧 According to many experiments and large-scale seed production at dozens of sites in Hejiashanyuan, Hunan Province, it has been proved that when cutting rice leaves (referring to the flag leaf) than cutting the leaves, it can significantly increase the 1000-grain weight and reduce the rate of the grain , Increase the number of solid particles, hybrid seeds can increase 10-15%. However, seed production is agronomic measures and external conditions through the parental individual and group after their own comprehensive balance, achieved by out-crossing and fruiting. So tight