阿克苏地区井式灌溉方式下枣树茎流变化  

Sap Flow Variations of Jujube Tree under Pit Irrigation

作　　者：刘帮[1] 李宏[2] 张志刚[1] 程平[2] 王真真[1] 武钰[3] 苗乾乾 韩莹莹[3] 

机构地区：[1]新疆农业大学林学与园艺学院,新疆乌鲁木齐830052 [2]新疆林业科学院,新疆乌鲁木齐830000 [3]新疆师范大学,新疆乌鲁木齐830054

出　　处：《西北林学院学报》2015年第3期54-60,共7页Journal of Northwest Forestry University

基　　金：林业公益性行业科研专项(201304701-2)

摘　　要：采用美国Dynamax公司生产的Flow-32包裹式茎流计和HOBO小气候仪对阿克苏地区幼龄枣树的茎流速率以及气象因素进行连续测定,选取晴天与阴雨天2种典型天气条件,探究在新型节水方式—林木井式节水灌溉方法下,枣树茎流速率连日变化情况,日变化情况以及茎流速率与气象因素之间的关系。研究表明:枣树茎流速率连日变化中均呈现明显的昼夜变化规律,且有时夜间仍存在较低的茎流值;晴天条件下,茎流速率呈单峰型曲线,阴雨天条件下,茎流速率呈现不规则多峰型曲线;2种典型天气下,枣树日累积茎流量变化过程曲线均呈现明显的"S"形,日累积茎流量晴天>阴雨天;通过枣树茎流速率与气象因素的相关分析可得,枣树茎流速率与太阳辐射及温度都存在明显的正相关性,相关系数晴天条件下分别为:0.932、0.874,阴雨天条件下分别为0.689、0.597;晴天条件下枣树茎流速率与空气湿度呈现负相关性相关系数为-0.852;2种典型天气条件下茎流速率与太阳辐射相关性最显著。By employing the wrapped stem sap flow meter （Flow-32） and HOBO microclimate instrument, the stem sap flow rate and meteorological factors of jujube seedlings growing in Aksu were measured continuously in two typical weather conditions： sunny and rainy days to explore the variations of seedling sap flow rate under the pit irrigation condition. It was observed that jujube sap flow rate demonstrated a significant circadian variation. However, low stem sap flow could still be measured at night occasionally. Under sunny days, the stem sap flow rate curve showed a single peak, while irregular multimodal curve was observed in rainy days. In both typical weather conditions, the variation of the flow rate was a typical ＂S＂ shaped. The daily cumulative amount of sap flow in sunny days was more than that in rainy days. Correlation analysis showed that the sap flow rate was positively correlated to solar radiation and temperature, with correlation coefficients of 0. 932, 0. 874 in sunny days, and 0. 689 and 0. 597 in rainy days. The sap flow rate was negatively correlated to air humidity, with a coefficient of -0. 852. The correlation of sap flow was the most significant with solar radiation under two typical weather conditions.

关 键 词：阿克苏 幼龄枣树 茎流速率 气象因素 天气条件 

分 类 号：S718.43[农业科学—林学]