植物生态学报 ›› 2022, Vol. 46 ›› Issue (8): 890-903.DOI: 10.17521/cjpe.2021.0363
所属专题: 生态系统碳水能量通量
冯印成1, 王云琦1,*(), 王玉杰1, 王凯1, 王松年1, 王杰帅2
收稿日期:
2021-10-12
接受日期:
2022-03-21
出版日期:
2022-08-20
发布日期:
2022-04-22
通讯作者:
王云琦
作者简介:
*(wangyunqi@bjfu.edu.cn)FENG Yin-Cheng1, WANG Yun-Qi1,*(), WANG Yu-Jie1, WANG Kai1, WANG Song-Nian1, WANG Jie-Shuai2
Received:
2021-10-12
Accepted:
2022-03-21
Online:
2022-08-20
Published:
2022-04-22
Contact:
WANG Yun-Qi
摘要:
利用涡度相关技术于2019年9月-2020年8月在重庆缙云山针阔混交林生态系统观测了水汽通量和其他环境要素。基于观测数据, 分析了水汽通量特征及其与环境因子的关系。结果表明: (1)针阔混交林生态系统能量闭合率为0.77, 且通量足迹高贡献区域所处方向与风玫瑰图的全年主风方向(东北风向)一致, 累计通量贡献区变异系数比较小, 证明涡度相关技术在研究区适应性较好, 数据可靠。(2)缙云山针阔混交林的全年水汽通量基本为正值, 月平均日变化范围为-0.001-6.623 mmol·m-2·s-1, 说明研究区为水汽源。水汽通量月平均日变化和季节变化均为单峰趋势。夏季水汽通量平均值最大(4.620 mmol·m-2·s-1), 变化趋势强; 冬季水汽通量值最低(2.077 mmol·m-2·s-1), 变化趋势弱。(3)该地区全年蒸散总量(792.40 mm)占降水总量(1 489.18 mm)的53.12%, 夏季的蒸散量(325.53 mm)和降水量(680.52 mm)最高, 分别占到全年蒸散量和降水量的41%和46%。缙云山针阔混交林生态系统站点与其他地区不同生态系统站点对比, 得出全年蒸散量为湿地>森林>农田。(4)净辐射、气温、饱和水汽压差和风速对水汽通量的影响在各季节均显著, 净辐射、气温和饱和水汽压差与水汽通量呈正相关关系, R2最大分别为0.85、0.53和0.60, 风速与水汽通量呈负相关关系, R2为0.61, 均是夏季的相关性最高, 其中净辐射和气温是影响水汽通量的最主要因子。
冯印成, 王云琦, 王玉杰, 王凯, 王松年, 王杰帅. 重庆缙云山针阔混交林水汽通量特征及其影响因子. 植物生态学报, 2022, 46(8): 890-903. DOI: 10.17521/cjpe.2021.0363
FENG Yin-Cheng, WANG Yun-Qi, WANG Yu-Jie, WANG Kai, WANG Song-Nian, WANG Jie-Shuai. Water vapor fluxes and their relationship with environmental factors in a conifer-broadleaf mixed forest ecosystem in Jinyun Mountain, Chongqing, China. Chinese Journal of Plant Ecology, 2022, 46(8): 890-903. DOI: 10.17521/cjpe.2021.0363
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