基于PM模型的广西南宁尾巨桉中龄林蒸散特征

doi:10.12302/j.issn.1000-2006.201911006

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南京林业大学学报（自然科学版） ›› 2021, Vol. 45 ›› Issue (2): 127-134.doi: 10.12302/j.issn.1000-2006.201911006

基于PM模型的广西南宁尾巨桉中龄林蒸散特征

任世奇¹^,²(), 朱原立²^,³, 梁燕芳²^,³, 陈健波¹^,², 卢翠香¹^,², 伍琪¹^,², 韦振道¹^,²

1.广西壮族自治区林业科学研究院,广西南宁 530002
2.广西南宁桉树森林生态系统定位观测研究站, 广西南宁 530002
3.广西壮族自治区国有七坡林场,广西南宁 530225

收稿日期:2019-11-04 接受日期:2020-02-16 出版日期:2021-03-30 发布日期:2021-04-09
基金资助:
广西科技重大专项(AA17204087-9);国家重点研发计划(2016YFD0600504);广西林业科技项目(桂林科字[2016]第35号)

Evapotranspiration characteristics of middle-aged Eucalyptus urophylla×E. grandis plantation based on Penman-Monteith model in Nanning, Guangxi

REN Shiqi¹^,²(), ZHU Yuanli²^,³, LIANG Yanfang²^,³, CHEN Jianbo¹^,², LU Cuixiang¹^,², WU Qi¹^,², WEI Zhendao¹^,²

1. Guangxi Zhuang Autonomous Region Forestry Research Institute, Nanning 530002, China
2. Guangxi Nanning Eucalypt Plantation Ecosystem Observation and Research Station, Nanning 530002, China
3. Guangxi Zhuang Autonomous Region State-owned Qipo Forest Farm, Nanning 530225, China

Received:2019-11-04 Accepted:2020-02-16 Online:2021-03-30 Published:2021-04-09

摘要/Abstract

摘要：

【目的】了解PM模型模拟桉树林蒸散的适用性,掌握南宁低山丘陵区的尾巨桉林蒸散特征,为编制桉树人工林生产经营方案提供参考依据。【方法】于2013年8月—2016年7月连续观测南宁桉树生态站尾巨桉林的小气候和水文数据,应用PM模型模拟尾巨桉林的蒸散量,并与水量平衡方程计算的蒸散量进行比较。【结果】月和年时间尺度的干旱指数均表明南宁低山丘陵区的尾巨桉林处于湿润或半湿润水分条件;PM模型模拟的日均蒸散量为3.5 mm/d,其中最高为9.8 mm/d;月均蒸散量为96 mm,季节间蒸散量大小顺序为夏季>春季>秋季>冬季;年均蒸散量1 156 mm,占同期降水量的82%;基于水量平衡方程的蒸散量与PM模型的蒸散量差异不显著。【结论】水量平衡方程与PM模型的月蒸散量变化相似度较高,两种方法估算的尾巨桉林蒸散量差异不显著,PM模型可粗略估算尾巨桉林的蒸散量。通过提高尾巨桉林的PM模型模拟参数精度,尤其是尾巨桉林的空气动力学阻力精度,以及提高水量平衡各分量的实测精度,可进一步降低南宁低山丘陵区尾巨桉林蒸散量估算偏差,此外,研究期间的土壤含水量基本处于偏湿状态,土壤水分不成为南宁低山丘陵区尾巨桉林蒸散的限制因子。

关键词: PM 模型, 水量平衡方程, 蒸散, 土壤水分, 尾巨桉

Abstract:

【Objective】To apply the Penman-Monteith (PM) model to the analysis of the characteristics of evapotranspiration of Eucalyptus urophylla×E. grandis plantation in hilly area of Nanning, this paper aimed to provide a reference for compiled production and a management plan of an eucalyptus plantation. 【Method】We continuously observed the microclimate and hydrological data of E. urophylla × E. grandis plantation in the Nanning Eucalypt Ecosystem Station (NEES), and used the PM model to estimate the evapotranspiration of E. urophylla × E. grandis, and then compared the evapotranspiration estimated by the Water Balance Equation (WBE) with that of the PM model.【Result】The drought index in the month and year time scales indicated that E. urophylla × E. grandis plantation remained in a state of wet or semi-wet conditions. Average daily evapotranspiration was 3.5 mm/d and the highest daily evapotranspiration was 9.8 mm/d. The average monthly evapotranspiration was 96 mm, and the rank of evapotranspiration between seasons was summer > spring > autumn > winter. The average yearly evapotranspiration was 1 156 mm, which accounted for 82% of the precipitation. There was no significant difference between evapotranspiration which was estimated using the PM model and WBE.【Conclusion】There was a similar change rule of evapotranspiration between the PM model and WBE, and the monthly evapotranspiration was also not significantly different between them. We assert that the PM model could be used to accurately estimate the evapotranspiration of E. urophylla × E. grandis plantation. To further reduce the deviation of the evapotranspiration value, we should enhance the precision of the parameters of the PM model, such as the aerodynamic resistance and the water-balance components. In addition, the soil water relative content was in a partially wet state during the study period, and the soil water was not a limiting factor for evapotranspiration of E. urophylla × E. grandis plantation in the hilly area of Nanning.

Key words: Penman-Monteith (PM) model, Water Balance Equation (WBE), evapotranspiration, soil water, Eucalyptus urophylla×E. grandis

中图分类号:

S715.3

任世奇,朱原立,梁燕芳,等. 基于PM模型的广西南宁尾巨桉中龄林蒸散特征[J]. 南京林业大学学报（自然科学版）, 2021, 45(2): 127-134.

REN Shiqi, ZHU Yuanli, LIANG Yanfang, CHEN Jianbo, LU Cuixiang, WU Qi, WEI Zhendao. Evapotranspiration characteristics of middle-aged Eucalyptus urophylla×E. grandis plantation based on Penman-Monteith model in Nanning, Guangxi[J].Journal of Nanjing Forestry University (Natural Science Edition), 2021, 45(2): 127-134.DOI: 10.12302/j.issn.1000-2006.201911006.

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试验地点 trial site	降水量/ mm precipitation	地形 terrain	土壤类型 soil type	树种(林龄) species (age)	株行距/m stand structure	方法 method	蒸散量/mm ET	干旱指数/% drought index
广西吴圩镇 (107°59'E,22°28'N) Wuwei Town, Guangxi	1 300	低山丘陵	成土母质为砂页岩发育的砖红壤	二代尾巨桉萌芽纯林(4~5 a)	2.0×4.0	PM 模型	1 073	83
广西吴圩镇 (107°59'E,22°28'N) Wuwei Town, Guangxi	1 300	低山丘陵	成土母质为砂页岩发育的砖红壤	二代尾巨桉萌芽纯林(4~5 a)	2.0×4.0	水量平衡方程	1 281	98
广东河头林场 (109°54'E,21°05'N) Hetou Forestry Farm, Guangdong	1 300	沿海台地	成土母质为浅海沉积物发育的砂红壤	尾叶桉纯林(3~4 a)	2.0×3.0	PM 模型	950	73
广东河头林场 (109°54'E,21°05'N) Hetou Forestry Farm, Guangdong	1 300	沿海台地	成土母质为浅海沉积物发育的砂红壤	尾叶桉纯林(3~4 a)	2.0×3.0	水量平衡方程	997	77
广东纪家林场 (109°52'E,20°54'N) Jijia Forestry Farm, Guangdong	1 300	沿海台地	成土母质为玄武岩发育的黏红壤	尾叶桉纯林(3~4 a)	1.5×2.0	PM 模型	1 121	86
广东纪家林场 (109°52'E,20°54'N) Jijia Forestry Farm, Guangdong	1 300	沿海台地	成土母质为玄武岩发育的黏红壤	尾叶桉纯林(3~4 a)	1.5×2.0	水量平衡方程	1 134	87

指标 index	蒸散量 ET	降水量 precipitation	土壤储水量变化 soil water storage change
降水量 precipitation	-0.013
土壤储水量变化 soil water storage change	-0.128^*	0.270^**
土壤相对含水量 soil relative water content	0.029	0.391^**	0.125^*

基于PM模型的广西南宁尾巨桉中龄林蒸散特征

Evapotranspiration characteristics of middle-aged Eucalyptus urophylla×E. grandis plantation based on Penman-Monteith model in Nanning, Guangxi

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