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| 准格尔旗砒砂岩区沙棘蒸腾耗水与环境因子的关系 |
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刘龙1,2, 姚云峰1,2, 郭月峰1,2, 祁伟1,2, 尉迟文思1,2, 韩兆敏1,2, 董晓宇1,2
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| (1.内蒙古农业大学 沙漠治理学院, 呼和浩特 010011;2.内蒙古自治区水利水电勘探设计院, 呼和浩特 010020) |
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| 摘要: |
| 为探究沙棘的蒸腾耗水规律及其对环境因子的响应，以内蒙古自治区鄂尔多斯市砒砂岩区典型造林树种沙棘为研究对象，采用SF60茎流计于2016年8月9—15日对沙棘（Hippophae rhamnoides Linn.）蒸腾速率进行监测，并同时结合HOBO小型气象站监测相关环境因子，对沙棘液流蒸腾速率及其与周围环境因子的连日变化的相关性进行深入研究。结果表明：1）沙棘的液流蒸腾速率表现为明显的昼夜变化规律，白天的蒸腾速率远高于夜间，夜晚有微弱的稳定的树干液流存在，呈双峰曲线趋势；2）沙棘树种液流蒸腾速率与环境因子的连日变化趋势基本相同，并且昼夜变化规律具有明显的波动性，且存在时滞效应，液流蒸腾速率与环境因子有密切的联系，同太阳辐射、空气温度、风速、10 cm地温、水汽压亏缺环境因子呈正相关，而与空气相对湿度呈负相关关系；3）沙棘液流蒸腾速率与各环境因子回归方程为Vs=-0.007-0.004V-0.025Tb+0.679VPD+0.155Rs+0.011RH+0.207Ta，其中Vs为液流蒸腾速率，kg/h；V为风速，m/s；Ta为空气温度，℃；VPD为水汽压亏缺，kPa；RH为空气相对湿度，%；Rs为太阳辐射，W/m2；Tb为10 cm土层地温，℃，决定系数R2为0.971。 |
| 关键词: 沙棘 蒸腾速率 砒砂岩区 相关性 |
| DOI：10.11841/j.issn.1007-4333.2018.06.13 |
| 投稿时间：2017-09-25 |
| 基金项目:国家自然科学基金项目（31500584）；内蒙古应用研究与开发计划项目（20110732）；高等学校科学研究项目（NJZZ16055）；内蒙古自然科学基金项目（2016MS0407）；内蒙古自治区高等学校（NJYT-17-B19）；内蒙古农业大学优秀青年科学基金培养项目（2017XYQ-3）；自治区应用技术研究与开发资金计划资助 |
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| Correlations between the transpiration water consumption of Hippophae rhamnoides Linn. and environmental factors in soft sandstone area of Zhungeer |
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LIU Long1,2, YAO Yunfeng1,2, GUO Yuefeng1,2, QI Wei1,2, YUCHI Wensi1,2, HAN Zhaomin1,2, DONG Xiaoyu1,2
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| (1.College of Desert Control and Engineering, Inner Mongolia Agricultural University, Hohhot 010011, China;2.Inner Mongolia Autonomous Region Institute of Water Resources and Hydropower Exploration, Hohhot 010020, China) |
| Abstract: |
| The aim of this study was to investigate the transpiration of Hippophae rhamnoides Linn.and its response to environmental factors.H.rhamnoides Linn.afforestation in the soft sandstone area of Ordos, Inner Mongolia Autonomous Region was taken as study object.The correlation between flow rate and daily changes of the surrounding environment factors was studied by using SF60 stem flow meter and HOBO small weather station from 9th August to 15th August.The results showed that:1) The transpiration rate of H.rhamnoides Linn.displayed a obvious diurnal variation.And the transpiration rate during the day was much higher than that at night.There was a slightly steady tree flow at night.2) The diurnal variation trend of transpiration rate changed with environmental factors.And the diurnal variation showed an obvious fluctuation, and there was a time-lagging effect.The transpiration rate of flow was closely related to environmental factors, which was positively correlated with air temperature, wind speed, 10cm ground temperature, water vapor pressure deficit and negatively with the relative air humidity.3) The regression equation of transpiration rate of H.rhamnoides Linn.with each environmental factor was Vs=-0.007-0.004V-0.025Tb+0.679VPD+0.155Rs+0.011RH+0.207Ta, where Vs is the transpiration rate (kg/h), V is the wind speed (m/s), Ta is the air temperature (℃), VPD is the water vapor pressure deficit (kPa), RH is the air relative humidity (%), Rs is the solar radiation (W/m2), Tb is the ground temperature (℃) of 10 cm soil layer.And the coefficient R2 is 0.971.These results provided scientific basis for the rational utilization of water resources and vegetation construction in soft sandstone area. |
| Key words: Hippophae rhamnoides Linn. transpiration rate soft sandstone area correlation |
