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柑桔属亚热带作物,喜温暖的气侯条件。甜橙低于-7℃,蜜柑低于-9℃,将发生冻害现象。湖南栽培柑桔历史悠久,是全国主要柑桔产区之一。但湖南处于南高北低的地理环境,冬季寒流长驱直入,平流降温频繁,常因“雪后霜”使柑桔招致冻害,柑桔生产很不稳定。解放以来,柑桔遭受了三次大冻害,损失很大。如何使柑桔安全过冬,稳产高产,是发展柑桔生产上一项急待解决的重大课题。最近,我们对这个问题进行了探讨,作了调查研究,发现一些柑桔科研,生产单位,采用枳壳高砧嫁接或高位靠接,对提高柑桔抗寒性能,有显著效果,值得推广。
Citrus subtropical crops, hi warm climate conditions. Sweet orange below -7 ℃, mandarin orange below -9 ℃, will occur frost damage phenomenon. Hunan cultivation of citrus has a long history, is one of the country’s major citrus producing areas. However, Hunan is in a geographical high and low in the south. Winter cold spells lead to frequent advection and frequent cooling. Citrus production is often unstable due to “frost after snowfall” causing citrus frost damage. Since the liberation, citrus suffered three major frost damage, a great loss. How to ensure the safety of citrus winter, stable and high yield, the development of citrus production is an urgent major issue to be solved. Recently, we conducted a study on this issue. We conducted a survey and research and found that some citrus research and production units are grafted with Citrus aurantium high stake or have high abutment to improve the cold resistance of citrus fruits, which is worthy of promotion.