北方落叶果树种子大部分具有自然休眠的特性,所以果实或种子成熟入土后,只有少数能够发芽(如杏和山杏),而多数果树种子不能够发芽,需要进行层积处理,以完成种子的后熟作用。层积处理法:生产上通常将种子与干净的河沙按照一定比例混合,然后放置在低温和通气良好的条件下,经过一段时间来完成 Most of the northern deciduous fruit trees have natural dormancy characteristics, so only a few germinate (such as apricots and wild apricots) after the ripening of the fruits or seeds, and most of the fruit trees can not germinate and need to be stratified to complete the seed After ripening effect. Laminar treatment: the production is usually the seeds and clean river sand mixed in accordance with a certain percentage, and then placed in low temperature and good ventilation conditions, after a period of time to complete