2008年钦州市龙眼丰产的气象成因分析

分析了2007～2008年钦州市龙眼产量形成关键期的气象条件。结果发现，2008年钦州市龙眼增产的主要原因是：晚秋梢生长期降雨正常，有利于秋梢生长及老熟；花芽分化期遇适宜时长的8～14℃低温刺激，有利于花芽分化的顺利进行；花穗抽生期遇3次相对低温过程，有利于抑制“冲梢”，利于成花；开花坐果期，温暖晴朗，有利于提高坐果率。

Analysis on the Meteorological Causes of High Yield of Longan in Qinzhou in 2008

The meteorological conditions in the critical period of yield formation of longan in Qinzhou from 2007 to 2008 were analyzed. The results showed that the main reasons of high yield of longan in 2008 were as follow： （ 1 ） the precipitation was normal in the late-autunm shoots growth periods period period, which was beneficial to the growth and mature of autumn shoots; （2） the days of low temperature stimulating at 8 - 14 ~C in flower bud differentiation period were suitable, which was beneficial to the flower bud differentiation; （3） three processes of relatively low temperature appeared in flower clusters formation period, which was beneficial to inhibit the blossom clusters form leaflets and promote the flower formation; （4） the weather was warm and the sky was clear in flowering and fruit bearing periods, which was beneficial to increase the fruit setting rate.