花期温湿度条件对储良龙眼生理落果的影响

Influence of Temperature and Humidity on Chuliang Longan Physiological Fruit Drop

为探索龙眼坐果率与开花后温度和湿度条件的关系,以储良龙眼为材料,分析28个温度和湿度自变量与花后30d坐果率的相关关系,结果表明:(1)花后7个日均低温变量与坐果率为显著或极显著正单相关关系,其中花后1～10d日均低温对坐果率直接影响最大。(2)开花后7个日均高温变量与坐果率具有显著或极显著相关性,除开花当日的相关为多项式相关外,其他6个变量均为正单相关,其中花后1～6d日均高温对坐果率的直接影响最大。(3)开花后7个日均温度变量与坐果率为显著或极显著正单相关关系,其中花后1～10d日均温度对坐果率直接影响最大。(4)坐果率与花后日均空气相对湿度的7个变量中仅花后1～6d达到负相关显著水平,且受到花后1～8d和1～15d日均空气相对湿度的影响。(5)在坐果率与温湿度的影响因素中,日均温度对坐果率的直接影响最大,日均低温和日均高温受间接因素影响较大,日均空气相对湿度与坐果率的相关性相对较小。

The correlativity between 28 humidity-temperature independent variables and fruit-set 30 d after flowering on Chuliang longan was conducted to explore the relationship between longan fruit-set and the humidity-temperature factors.The results showed that：（1） 7days after florescence,setting rate showed positive linear correlationship with average daily low temperature,and the average daily low temperature impacted directly on the setting rate 1~10 d after bloom.（2） 7days after florescence,setting rate showed positive linear correlationship with average daily high temperature,besides the first day showed multi-linear correlationship,the rest variables were positive linear correlationship,and the average daily high temperature impacted greatly on the setting rate 1~6 d after bloom.（3） 7days after florescence,setting rate showed positive linear correlationship with average daily temperature,the average daily temperature impacted greatly on the setting rate 1~10 d after bloom.（4） Setting rate showed negative linear correlationship with 7 variables of average daily relative humidity only on 1~6 d after bloom,and was affected by average daily relative humidity of 1~8 d and 1~15 d after bloom.（5） Among humidity,temperature factors on fruit setting,average daily temperature showed the greatest influence on setting rate,while average daily low temperature and average daily high temperature showed the second greatest influence.Compared with temperature,the correlativity between setting rate and the average daily relative humidity was not obvious.