我们环江县制种队今年早造在博白县龙潭公社进行杂交水稻制种,对叶龄、“双零叶期”、伸长叶枕距在制种中的应用有一些新的认识和体会。现综述如下:一、关于叶龄在早造制种中的应用1.亲本的主茎叶数和出叶速度2、3号恢复系于元月20日左右播种,虽采用薄膜覆盖育秧,但长期低温,生育期 We Huanjiang County Seed Production Team Earlier this year in Bobai County Longtan commune for hybrid rice seed production, on the leaf age, “Double zero leaf period ”, the extension of leaf pillow in the seed production in the application of some new Understand and understand. Are summarized as follows: First, on the age of early seedling in the application of 1. The main stem leaf number and leaf speed 2, 3 recovery system around January 20 sowing, although the use of film covered seedling, but Long-term low temperature, growth period