河北坝上地区雨养裸燕麦田间蒸散规律

裴宏伟; 张红娟; 王飞枭; 王鑫; 沈彦俊; 马宏

裴宏伟,张红娟,王飞枭,王鑫,沈彦俊,马宏.河北坝上地区雨养裸燕麦田间蒸散规律[J].干旱地区农业研究,2021,39(4):203~208

河北坝上地区雨养裸燕麦田间蒸散规律

Evapotranspiration of rainfed naked oat field in Bashang region of Hebei Province

DOI：10.7606/j.issn.1000-7601.2021.04.26

英文关键词:large weighing lysimeter RZWQM2 model field evapotranspiration naked oat field Bashang region of Hebei Province

基金项目:国家自然科学基金（41701017）；河北省科技厅重点研发计划项目（18397002D,18227007D）；河北省教育厅青年拔尖人才项目（BJ2018027）；河北省科技厅高水平人才团队建设项目（199A4201H）

作者	单位
裴宏伟	河北建筑工程学院，河北张家口 075000；河北省水质工程与水资源综合利用重点实验室，河北张家口 075000
张红娟	河北建筑工程学院，河北张家口 075000；河北省水质工程与水资源综合利用重点实验室，河北张家口 075000
王飞枭	河北建筑工程学院，河北张家口 075000；河北省水质工程与水资源综合利用重点实验室，河北张家口 075000
王鑫	张家口市农业高效节水研究所，河北张家口 075000
沈彦俊	中国科学院遗传与发育生物学研究所农业资源研究中心，河北石家庄 050021
马宏	河北建筑工程学院，河北张家口 075000

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中文摘要:

依托大型称重式蒸渗仪在2018年和2019年裸燕麦生育期内进行田间蒸散量的测定，利用根区水质模型（RZWQM2）对田间蒸散量变化的动态过程进行了模拟，并分析了不同时间尺度下田间蒸散特征及其环境影响因素。结果表明：RZWQM2模型对裸燕麦生育期内田间蒸散量模拟结果较好，2018年和2019年绝对平均误差（MAE）分别为1.11 mm·d^-1和1.19 mm·d^-1,决定系数（R²）分别为0.71和0.68，一致性指数（d）值均大于0.60；生育期内裸燕麦田间蒸散呈现 “单峰型”曲线，在孕穗期日均蒸散峰值分别达到5.02、5.41 mm·d^-1；各生育期内日均蒸散量为：孕穗期＞开花期＞成熟期＞拔节期＞出苗期，变化态势与叶面积指数表现一致；两种不同天气（多云和晴天），雨养裸燕麦田间蒸散均主要集中在6∶00—18∶00，约占日总蒸散的84%，而在18∶00—6∶00蒸散较低且变化相对稳定，约占日总蒸散的16%，雨养裸燕麦的蒸散过程受天气影响较大，晴天田间蒸散约为多云条件下的2倍。

英文摘要:

In order to evaluate the field evapotranspiration of naked oat in dryland in Bashang region of Hebei Province, large weighing lysimeter was used to measure field evapotranspiration during the growth periods of naked oat field in 2018 and 2019. The dynamic process of field evapotranspiration was simulated by Root Zone Water Quality Model (RZWQM2). Furthermore the environmental driving factors of these dynamic process were also analyzed. The results showed that the RZWQM2 model performed well in simulating the field evapotranspiration during the growth period of naked oat, MAEs were 1.11 mm·d^-1 and 1.19 mm·d^-1 in calibration and validation years, respectively, and R² were 0.71 and 0.68 in both years. The variation of evapotranspiration during growing period showed the trend in which the field evapotranspiration increased first and then decreased in the entire period, with the daily average maximum evapotranspiration occurring in booting period (5.02 mm·d^-1 in 2018 and 5.41 mm·d^-1) in 2019. The average daily evapotranspiration during different growth stages were as follows: booting stage > flowering stage > maturity stage > jointing stage > seedling stage, and the change was consistent with leaf area index. In two different weather conditions (cloudy and sunny), the field evapotranspiration of rain\|fed naked oat mainly concentrated in the daytime (6∶00 AM to 6∶00 PM), accounting for approximately 83% of the total evapotranspiration. In contrast, evapotranspiration at night (from 6∶00 PM to 6∶00 AM) was lower and more stable, accounting for approximately 16% of the total evapotranspiration. The weather influenced the evapotranspiration process of rain\|fed naked oat more dramatically, as the field evapotranspiration on sunny day was about twice of cloudy day.

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