在果树苗木繁育中,为促进砧苗加粗生长,尽早达到嫁接粗度,采用摘心方法较多,但近年来也有提出幼苗摘心不能促进加粗生长。为进一步探讨摘心对砧苗加粗的影响,我们在本校苗圃内,对当年播种的海棠实生苗进行摘心对比试验。圃地土壤为砂土,偏碱性。试验设3种不同高度的幼苗分别 In the fruit tree seedling breeding, in order to promote the thick growth of the stock, as soon as possible to achieve grafting thickness, with more topping method, but in recent years also proposed that the seedling topping can not promote the bold growth. In order to further explore the impact of topping on the anvil seedling thickening, we in the nursery school, on the current year sown Begonia seedlings topping comparison test. Soil garden soil, alkaline. Experiment set three different height seedlings respectively