若干气候因素对广西荔枝龙眼产量的影响

The Effects of Climatic Factors on Yields of Lichee and Longan in Guangxi

关键词:  气候因素  荔枝  龙眼  产量

Key words:  climatic factors  lichee  longan  yield

摘要:

根据1952~1966年、1970~2000年广西荔枝、龙眼总产量资料,分析广西荔枝、龙眼产量序列的变化特征和严重霜冻、气温、降水、日照及冬季低温寒积量等气候因素对广西荔枝、龙眼产量的影响。认为严重霜冻是发展荔枝、龙眼生产的限制条件,当最低气温在-2℃以下时,对产量的影响十分严重;荔枝、龙眼各生育期的气候因素,对产量有明显影响;荔枝、龙眼的花芽分化,需要适当的低温寒积量,初步认为总寒积量10~45℃(或10~40℃)有利于广西荔枝、龙眼增产。

Abstract:

The effects of heavy freeze,air temperature,rainfall,sunlight and low temperature cold accumulation on the yields and the change of yield series of lichee and longan in Guagnxi are discussed based on the yield information of lichee and longan in the periods of 1952 to 1966 and 1970 to 2000.The heavy freeze is a limiting factor to the development of lichee,and longan,and their yields are affected heavily when the air temperature drops to -2℃.The yields of lichee and longan are also affected obviously by the climate factors in the growth and development stages.Lichee and longan need proper cold accumulation in the flower bud initiation.The total cold accumulation of 10 to 45℃(or 10 to 40℃) is helpful to increase the yield of lichee and longan.