种子冬季储藏方法不当,将直接影响种子来年的成活率及保存率。大多数果树砧木种子,春播前都需要经过沙藏层积处理,才能正常发芽和生长。一、层积原理在低温沙藏的条件下,氧气的溶解度增大,在此过程中,种子本身可解除休眠,软化种皮,增加种皮的透性,对于一些生理后熟的种子,胚会明显增大,完成生理后熟过程, Improper storage of seeds in winter will directly affect the survival rate and preservation rate of seeds in the coming year. Most fruit tree rootstocks need to be stratified before being sowed in spring before they can germinate and grow normally. First, the principle of stratification Under the conditions of low temperature sand storage, oxygen solubility increases, in the process, the seeds themselves can be lifted dormancy, softening the seed coat, an increase of seed coat permeability, for some physiologically mature seeds, embryos Will be significantly increased to complete the process of physiological ripening,