一、健壮秧苗增产的原因秧苗发根所需的营养元素是从地上部分运来的,而移栽后的一段时间内,秧苗的光合作用明显下降。所以,发根的碳水化合物也是靠体内积累供给的,健壮的秧苗为发根贮存了必要的营养成分,所以发根快。如果秧苗素质差,体内碳氮比低,则容易导致萎蔫而死亡。健壮的秧苗能减少失水量。由于健壮秧苗发根快,植伤率小,抗逆性强,所以,分蘖早、分蘖多,各生育期相应提前。据在有效分蘖终止 First, the reasons for robust seedling yield Seedlings hair root nutrients required from the ground transport, and transplanted within a period of time, the photosynthesis of seedlings decreased significantly. Therefore, the carbohydrate root hair is also accumulated supply by the body, sturdy seedlings for hair root storage of essential nutrients, so hair root fast. If the seedlings of poor quality, low carbon-nitrogen ratio in the body, it is likely to lead to wilting and death. Robust seedlings reduce water loss. As a result of robust seedling hairy roots, a small rate of plant damage, strong resistance, therefore, early tillering, tillering, corresponding to the earlier stage of growth. It terminates at effective tillering