灰色系统理论在苹果树水势与生态因子日变化中的应用研究

应用灰色系统方法在露地条件下对不同嫁接组合红星和金冠苹果树枝条、叶片、果实水势与环境因子的日变化关系分析表明：影响苹果树枝条、叶片、果实水势日变化的生态因子中，相对湿度、温度辐射照度是主要影响因子，且相对湿度和温度对苹果树水势的作用相对高于辐射照度；不同嫁接组合苹果树各器官水势日变化趋势一致，但其变化幅度不同。

Studies on Application of Grey system Theory in Relations Between Environ Mental Factors and Water Potential Changes of Apple Trees During the Day

Relations between environmental factors and branch leaf fruit water potential of different grafting Red Star and Golden Delicious apple trees growing in field are analysed by means of grey system theory.The results indicate:among the environmental factors that affect the water potential of apple trees during the day,relative humidity temperature and irradiance are primary factors;effects of relative humidity and temperature on the water potential of apple trees are relatively higher than that of irradiance;diurnal changes of water potential of branch,leaf and fruit have the same tendency,but their ranges of change are different.