生产中常有果树不结果的现象,笔者现就十几年果业技术推广中经常遇到的果树不结果现象的成因及防治作一简要介绍。一、果树不开花果树都有童期性,即在正常的自然条件下不能稳定连续开花。处于童期的果树均不开花结果。不同的果树童期长短不同。一是由遗传性决定,葡萄童期只有1年,柑桔有5～8年,银杏有30～40年(故称公孙树)。二是由生长势和分生节数决定,同一品种长势快的童期短,如柑桔一般百枝干叶为开花的临界节数。要使处于童期的果树提早开花结果,一要 Fruit production is often not the result of the phenomenon, the author now more than 10 years of fruit industry technology promotion is often encountered in the fruit of the phenomenon of non-occurrence and prevention for a brief introduction. First, the fruit trees are not flowering Fruit trees are of childhood, that under normal natural conditions can not be stable and continuous flowering. Fruit trees in childhood are not flowering results. Different fruit trees of different lengths of childhood. First, the genetic decision, grape only 1 year of childhood, citrus have 5 to 8 years, 30 to 40 years of ginkgo (so called Gongsun Shu). The second is determined by the growth potential and the number of meristematic segments, the same species growing fast short period of childhood, such as citrus generally hundreds of dry leaves as the critical section of flowering. To make fruit trees in early childhood flowering results, one to want