| 雷州半岛尾巨桉人工林树干液流对台风天气的响应 |
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| 引用本文： | 王志超,许宇星,竹万宽,杜阿朋.雷州半岛尾巨桉人工林树干液流对台风天气的响应[J].林业科学研究,2017,30(4):679-684. |
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| 作者姓名： | 王志超 许宇星 竹万宽 杜阿朋 |
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| 作者单位： | 国家林业局桉树研究开发中心, 广东湛江桉树林生态系统国家定位观测研究站, 广东 湛江 524022,国家林业局桉树研究开发中心, 广东湛江桉树林生态系统国家定位观测研究站, 广东 湛江 524022,国家林业局桉树研究开发中心, 广东湛江桉树林生态系统国家定位观测研究站, 广东 湛江 524022,国家林业局桉树研究开发中心, 广东湛江桉树林生态系统国家定位观测研究站, 广东 湛江 524022 |
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| 基金项目： | 国家自然科学基金青年基金项目（31300383）；中央级公益性科研院所基本科研业务费专项资金项目（CAFYBB2014QB024）；广东湛江桉树林生态系统国家定位观测研究站运行补助（2017-LYPT-DW-137） |
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| 摘 要： | 目的]为正确认识台风对桉树人工林蒸腾耗水的影响。方法]采用热扩散茎流计对尾巨桉树干液流在台风前后进行连续监测,分析其对台风天气的响应,并同步测定林分气象条件,分析台风过程中树干液流与气象因子之间的相关性。结果]表明:台风当天,树干液流密度与台风登陆前后(单峰)不同,呈不规律多峰型曲线,树干日均液流密度(2.89 mL·h~(-1)·cm~(-2))较台风前减少53%,夜间液流波动较大;日间最大峰值(7.76 mL·h~(-1)·cm~(-2))出现在下午,峰值较台风前降低55%,树干液流日通量极显著小于台风登陆前后;台风登陆前树干液流密度峰值(17.4 mL·h~(-1)·cm~(-2))及平均液流密度(6.15 mL·h~(-1)·cm~(-2))分别是台风登陆过后的1.24倍和1.14倍,台风后树干液流日通量较台风前均有所下降;台风当天,影响液流的主要气象因子为风速、大气温度、空气湿度、水汽压亏缺和降雨量,液流与风速的相关系数较台风前增大52%,与降雨量的相关系数是台风前的2.6倍,与其他因子的相关系数较台风前均下降了50%左右,而台风登陆前后之间的主要影响因子差异不大。结论]台风当天的日均液流密度、白天的平均液流密度和日通量均极显著小于台风前后,而夜间液流显著大于台风前后;台风前后的日均液流密度差异不显著,夜间液流台风前显著大于台风后;台风过程中风速成为影响液流的关键因子,与太阳辐射相关性不显著,其他影响因子与台风前后相同,但相关系数除风速和降雨量外均显著下降。
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| 关 键 词： | 尾巨桉 台风 树干液流 热扩散式探针法 |
| 收稿时间： | 2017/1/9 0:00:00 |
Responses of Sap Flow of Eucalyptus urophylla×E. grandis to Typhoon Weather in Leizhou Peninsula |
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| WANG Zhi-chao,XU Yu-xing,ZHU Wan-kuan and DU A-peng.Responses of Sap Flow of Eucalyptus urophylla×E. grandis to Typhoon Weather in Leizhou Peninsula[J].Forest Research,2017,30(4):679-684. |
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| Authors: | WANG Zhi-chao XU Yu-xing ZHU Wan-kuan and DU A-peng |
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| Institution: | China Eucalypt Research Centre, Guangdong Zhanjiang Eucalyptus plantation Ecosystem Research Station, Zhanjiang 524022, Guangdong, China,China Eucalypt Research Centre, Guangdong Zhanjiang Eucalyptus plantation Ecosystem Research Station, Zhanjiang 524022, Guangdong, China,China Eucalypt Research Centre, Guangdong Zhanjiang Eucalyptus plantation Ecosystem Research Station, Zhanjiang 524022, Guangdong, China and China Eucalypt Research Centre, Guangdong Zhanjiang Eucalyptus plantation Ecosystem Research Station, Zhanjiang 524022, Guangdong, China |
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| Abstract: | Objective] To examine the affect of typhoon to water consumption of eucalyptus plantation, Methods] The sap flow of Eucalyptus urophylla × E. grandis plantation was continuously measured using thermal diffusion stem flow meter (Germany, SF-G) during the typhoon process, and to analyze the responses of sap flow of E. urophylla × E. grandis to the typhoon weather conditions. The stand meteorological conditions were determined synchronously to enable the correlations between sap flow and meteorological factors to be examined during the typhoon weather process. Result] The results showed that diurnal variations of sap flow displayed irregular multi-peak curves during the typhoon process, which was different from the typical single-peaked curves before and after the typhoon. The average daily flow density (2.89 mL·h-1·cm-2) was 53% less than that before the typhoon landing. The sap flow during typhoon night changed a lot, and the maximum peak (7.76 mL·h-1·cm-2) appeared in the afternoon which was 55% less than that before the typhoon landing. The flux in the day time during the typhoon process was significantly less than that before and after the typhoon (P<0.01). The flow peak before typhoon landing (17.4 mL·h-1·cm-2) and the average flow density (6.15 mL·h-1·cm-2) were respectively 1.24 times and 1.14 times after the typhoon, and the flux in day time after the typhoon was lower than that before the typhoon. The main meteorological factors during the typhoon weather process were wind speed, air temperature, air humidity, vapor pressure deficit and rainfall, and the correlation coefficient of the wind speed increased by 52% compared to that before the typhoon. The correlation coefficient of rainfall was 2.6 times in front of the typhoon, and the other factors decreased about 50% than that before the typhoon. The main meteorological factors changed little before and after the typhoon process. Conclusion] The average daily flow density, average flow density in the day time and daily flux during typhoon process were significantly less than that before and after the typhoon landing. But the fluid flow at night was significantly greater than that before and after the typhoon process. There was no obvious difference about the average daily flow density before and after the typhoon landing. But the fluid flow at night before the typhoon landing was significantly greater than that after the typhoon landing. The typhoon speed became the key factor of fluid flow through, and no significant correlation with solar radiation during the typhoon was found. Other factors kept unchanged before and after the typhoon, but the correlation coefficient in addition to the wind speed and rainfall were down significantly. |
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| Keywords: | Eucalyptus urophylla ×E grandis typhoon stem sap flow thermal dissipation probe (TDP) |
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