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一、引言香柠檬(Citrus Limonia var.Meyerslemon.Wong,据说是Citrus Limonia和Citrus sinensis的杂交种)是中国原产的果树,原名香园,过去在北京附近丰台地方有人把它种在花盆中,作为室内盆景,1908年被美国农业部植物搜罗引种组F.N.Meyer氏带至美国种植,至1932年才有人将香柠檬从美国带回广东。解放前,香柠檬只有一些农业研究机关和园艺爱好者作少量栽培,解放后由于人民政府注意发展,已成为广东栽培的柠檬类中种植最广,产量最多的品种。在广东的自然环境下,香柠檬的生长势很强,每年发生大量的枝梢和花朵,这固然能使树冠迅速扩大,产量增加,但也造成树冠中枝梢种类复杂、管理
I. INTRODUCTION Citrus Limonia var. Meyerslemon. Wong (said to be a cross between Citrus Limonia and Citrus sinensis) is a native Chinese fruit tree, formerly known as Hong Yuan. Some used to plant it in pots near Fengtai, near Beijing , As an indoor bonsai, was brought to the United States by FNMeyer, a U.S. Department of Agriculture plant-introduced group, in 1908 and until about 1932 some people brought the lemon from the United States back to Guangdong. Before the liberation, only some agricultural research institutes and horticultural enthusiasts made a small amount of bermudagrass. After the liberation, due to the people’s government’s attention to development, bermudagrass became the most widely planted and the most abundant variety among lemon cultivated in Guangdong. In the natural environment of Guangdong, the growth of bergamot is very strong, with a large number of branches and flowers occurring each year, which can not only make the canopy rapidly expand and the yield increases, but also cause the branches of the tree crown to have complicated types and management