苹果树进入盛果期后,由于营养代谢失调,往往出现大、小年周期结果现象,影响苹果产量不稳;易导致树体多病早衰。为此,特从苹果自然落花落果情况调查入手进行疏花疏果研究,以求有利于苹果生产。一、苹果落花落果的原因在苹果的开花结果过程中,凡影响花果正常发育的内、外部因素都可引起落花落果。分析苹果落果的叫个原因:①授粉受精不良,胚的发育不正常以及花粉和胚囊形成 Apple tree into the full fruit period, due to nutritional metabolism disorders, often large and small annual cycle phenomenon, affecting the instability of apple production; easily lead to tree premature senility. To this end, especially from the natural fall and fall apples to investigate the case of thinning thinning fruit research, in order to facilitate the production of apples. First, the reason apple falls off the fruit In the process of apple blossom, all the internal and external factors that affect the normal development of fruit and flower can cause drop. Analysis of apple falling fruit is called a reason: ① pollination and fertility, embryonic development is not normal and pollen and embryo sac formation