不同施肥处理葡萄着色成熟期茎流规律及对气象因子的响应

为探究葡萄着色成熟期在不同施肥处理下茎流速率变化规律和与气象因子的关系,以“户太8号”葡萄为研究对象,对其着色成熟期进行了茎流速率和气象因子的同步监测。结果表明,葡萄茎流呈明显的昼夜变化,日变化曲线呈“几”字形,不同施肥处理下茎流速率为:中肥>低肥>高肥;阴天时茎流启动和峰值迟于晴天,不同天气下茎流速率与净辐射、饱和水汽压差和气温呈正相关,而与相对湿度呈负相关;施肥量不同会改变茎流速率对气象因子的响应,净辐射是不同处理下茎流速率的主要气象影响因子,决定系数均在0.791以上。

Stem Flow Regularity of Grape Coloring and Its Response to Meteorological Factors in Different Fertilization Treatments

In order to investigate the changes of stem flow rate and the relationship with meteorological factors under different fertilization treatments,the“Hutai 8”grape is used as the research object to monitor the stem flow rate and meteorological factors simultaneously.The results show that the stem flow of the grape shows an obvious diurnal variation,and the daily variation curve shows several shapes.The stem flow rate and daily accumulation under different fertilization treatments are:medium fertilizer>low fertilizer>high fertilizer.On a cloudy day,the stem flow starts and the peak is later than that on a sunny day.The stem flow rate is positively correlated with net radiation,saturated water vapor pressure difference and temperature in different climates,but negatively correlated with relative humidity.Different fertilization amount would change the response of stem flow rate to meteorological factors.Net radiation is the main meteorological flow rate under different treatments.The impact facto and the coefficient of determination are all above 0.791.