| 摘要: |
| 为分析灌溉、降雨、霜冻对西北旱区葡萄园水碳通量的影响，以我国西北干旱区葡萄园为例，采用涡度相关系统和茎流计对降雨、灌溉和霜冻前后的葡萄园水碳通量进行连续对比观测。结果表明：1）降雨后，葡萄园蒸散发量迅速增加，随着时间推移逐渐降低；日峰值出现的时间由14：00推迟到15：00，葡萄园蒸腾量呈缓慢增加趋势；2）灌溉后，葡萄园蒸散发量先逐日增加，达到峰值后再逐渐减小；3）灌溉和降雨均明显增加了葡萄园的碳汇量；4）霜冻后，葡萄叶片几乎死亡，蒸腾量急剧减小接近于0，净生态系统交换量的波动迅速减缓，葡萄园转入碳源阶段。 |
| 关键词: 葡萄园 干旱地区 水碳通量 涡度相关 |
| DOI：10.11841/j.issn.1007-4333.2018.04.11 |
| 投稿时间：2017-05-12 |
| 基金项目:国家自然科学基金优秀青年科学基金项目（51622907） |
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| Responses of water and carbon fluxes in vineyard to irrigation, rainfall and frost |
|
GUO Xiaoxu, LI Sien, ZHAO Peng, WANG Rong
|
| (College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| In order to investigate the responses of water and carbon fluxes of vineyard to irrigation,rainfall and frost as well as the differences between,a typical vineyard in arid northwest China was taken as example and successive observations on rainfall,irrigation and water and carbon fluxes before and after frost were conducted based on eddy covariance,stem flow gauge and micro-lysimeter in this study.The result showed the monthly mean daily variation of every parts of water and carbon fluxes.And It was also discovered that evapotranspiration (ET) of the vineyard increased quickly after rainfall and decreased slowly afterwards over time.The time of emergence of the peak value delayed from 14:00 to 15:00.But the grape transpiration increased very slowly.Vineyard ET increased first and then decreased step by step after reaching the peak after irrigation.The irrigation and rainfall both enhanced the carbon sink of the vineyard.Grape leaves almost died and transpiration decreased sharply (close to zero) after frost.And after frost,the fluctuation of net ecosystem exchange curve became smaller indicating that the vineyard turned into carbon sink period. |
| Key words: vineyard arid region water and CO2 fluxes eddy covariance |
