| 引用本文: | 乔 英,张百和,邱凯,等.基于涡度系统的干旱区枣林能量平衡分析[J].灌溉排水学报,0,():-. |
| Qiao Ying,Zhang Baihe,Qiu Kai,et al.基于涡度系统的干旱区枣林能量平衡分析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目的】揭示干旱区枣林的能量循环与能量变化规律，有助于动态评价干旱区枣林生态系统中能量平衡和分配规律，提高农业用水效益。【方法】利用涡度相关法得到干旱区枣林连续2年的通量数据，分析了能量变化规律、分配方式以及热存储项能量的日平均变化规律。【结果】（1）干旱区枣林生态系统的净辐射Rn、潜热通量LE、显热通量H、土壤热通量G在各个月份的日平均能量变化均呈以净辐射变化规律为基础的单峰变化。（2）干旱区枣林的整年度半小时尺度能量闭合度为73.45%、73.11%，计入热储存项后，能量闭合度分别提高了2.75%、3.72%达到了77.17%、75.86%。（3）干旱区枣林的土壤热储存项日平均变化在生育期和休眠期规律相似；潜热热储存项和显热热储存项在生育期和休眠期变化规律不同；光合热储存项和冠层热储存项在休眠期均为0，在生育期有典型的日变化。【结论】热存储项对干旱区枣林生态系统的能量平衡闭合程度贡献不大，干旱区枣林的能量分配方案受到水分条件、植被类型和气候特征的影响。 |
| 关键词: 干旱区;枣林;涡度相关法;能量平衡; |
| DOI： |
| 分类号:S718.5 |
| 基金项目:高校科研计划项目(XJEDU2022P135)；2022年度“两山理论与南疆高质量绿色发展研究中心”科研项目(JDZD202202)；新疆理工学院高层次人才项目(XJLG2022G001)。 |
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| Energy balance analysis of Jujube forests in arid areas based on the eddy covariance method |
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Qiao Ying, Zhang Baihe, Qiu Kai, Wang Tengfei
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Xinjiang Institute of Technology
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| Abstract: |
| 【Objective】Revealing the energy cycle and energy change patterns in arid zone jujube forest can help to dynamically evaluate the energy balance and distribution patterns in arid zone jujube forest ecosystems and improve the efficiency of agricultural water use. 【Method】This study used the eddy correlation method to obtain flux data of jujube forests in the arid zone for 2 consecutive years, and analyzed the energy change pattern, distribution mode and the daily average change pattern of energy of thermal storage term. 【Result】The results showed that (1) the daily average energy changes of net radiation Rn, latent heat flux LE, sensible heat flux H and soil heat flux G in jujube forest ecosystem in the arid zone in each month showed a single-peaked change based on the net radiation change pattern. (2) The annual 30-minute energy closure of jujube forest in arid area was 73.45% and 73.11%, and the energy closure increased by 2.75% and 3.72% to 77.17% and 75.86% respectively after adding heat storage item. (3) The average daily changes of soil heat storage term in jujube forests in arid zones were similar in fertility and dormancy; the latent heat storage term and sensible heat storage term had different patterns of changes in fertility and dormancy; the photosynthetic heat storage term and canopy heat storage term were both zero in dormancy and had typical daily changes in fertility.【Conclusion】The thermal storage term has little contribution to the energy balance closure of the jujube forest ecosystem in arid areas. The energy allocation plan of jujube forests in arid areas is influenced by water conditions, vegetation types, and climate characteristics. |
| Key words: arid area; jujube forests; eddy covariance method; energy balance |
