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【目的】探究‘库尔勒香梨’3种树形树干液流与气象因子的变化关系,了解树体蒸腾耗水特性,为梨园科学的水分管理提供理论依据。【方法】运用PS-TDP8型热耗散式树干液流测定系统连续监测树干液流,并采用Davis自动气象站同步连续监测光照强度、空气温度、空气相对湿度3个气象因子,分析二者的相互关系。【结果】‘库尔勒香梨’3种树形树干液流量呈明显的昼高夜低起伏趋势。不同树形树干液流量存在差异,3种树形树干液流量均值和峰值大小为疏散分层形>棚架形>开心形。树干液流量的变化与气象因子的变化相关,棚架形和疏散分层形树干液流量与气象因子的相关程度依次为光照强度>空气温度>水汽压亏缺>空气相对湿度,开心形树干液流量与气象因子的相关程度依次为水汽压亏缺>光照强度>空气温度>空气相对湿度。树干液流量的变化与气象因子的变化不同步,存在时滞现象,3种树形树干液流量的变化均滞后于光照强度,早于空气温度和水汽压亏缺的变化。【结论】‘库尔勒香梨’树干液流量呈昼高夜低的变化趋势,开心形树干液流量最小,变化幅度最小。气象因子对3种树形树干液流量的变化存在显著影响,光照强度和空气温度对液流量的影响最大。
【Objective】 The objective of this study is to explore the relationship between the flow of tree species and the meteorological factors in ’Korla’ pear ’Pear’ and to understand the water consumption characteristics of tree transpiration and to provide a scientific basis for scientific management of pear water. 【Method】 The PS-TDP8 heat-dissipative trunk flow measurement system was used to continuously monitor the sap flow. Three meteorological factors such as light intensity, air temperature and air relative humidity were continuously monitored by Davis automatic weather station. Interrelationship. 【Result】 The results showed that the flow of three kinds of tree trunk stems of ’Korla fragrant pear’ showed obvious day-night night and low-rise and fall trend. Different tree trunk sap flow differences, the three kinds of tree sap flow average and peak size of the evacuation stratified> scaffolding> happy shape. The change of sap flow rate is related to the change of meteorological factors. The correlation between the sap flow volume and shelter shape of evacuated dendritic stems and the meteorological factors are light intensity, air temperature, vapor pressure deficit, air relative humidity, The correlation between the flow rate and meteorological factors is vapor pressure deficit> light intensity> air temperature> air relative humidity. The change of sap flow was not synchronized with the change of meteorological factors. There was a time lag phenomenon. The changes of sap flow of three kinds of tree lags behind the light intensity, earlier than the change of air temperature and vapor pressure deficit. 【Conclusion】 The stem sap flow of ’Korla fragrant pear’ showed the trend of daytime and night-night low, and the volume of heart-shaped sap flow had the smallest change with the smallest change. The meteorological factors have a significant effect on the change of the tree liquid flow in the three tree species. The light intensity and air temperature have the greatest influence on the liquid flow.