Evapotranspiration Characteristics of Alfalfa and Its Influencing Factors in the Coastal Saline-Alkali Land of Hebei Province

doi:10.11733/j.issn.1007-0435.2025.02.027

Acta Agrestia Sinica ›› 2025, Vol. 33 ›› Issue (2): 575-585.DOI: 10.11733/j.issn.1007-0435.2025.02.027

Evapotranspiration Characteristics of Alfalfa and Its Influencing Factors in the Coastal Saline-Alkali Land of Hebei Province

ZHANG Li-feng¹, XIE Nan¹, CUI Su-qian², SUN Guo-tong², FENG Wei¹, SHI Jia-qi¹, PAN Xuan¹, ZHI Jian-fei¹, QIN Wen-li¹, LI Jian-ming³, ZHANG Hong-fa⁴, LI Ya-nan⁴, LIU Zhen-yu¹, LIU Zhong-kuan¹

1. Institute of Agricultural Resources and Environment, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang, Hebei Province 050051, China;
2. Huanghua Agricultural and Rural Development Bureau, Cangzhou, Hebei Province 061100, China;
3. Livestock Breeding Station of Hebei Province, Shijiazhuang, Hebei Province 050011, China;
4. Cangzhou Animal Husbandry Technology Extension Station, Cangzhou, Hebei Province 061000, China

Received:2024-04-07 Revised:2024-05-23 Published:2025-03-01

河北滨海盐碱地雨养旱作紫花苜蓿蒸散特性及其影响因子

张立锋¹, 谢楠¹, 崔素倩², 孙国通², 冯伟¹, 石嘉琦¹, 潘璇¹, 智健飞¹, 秦文利¹, 李建明³, 张洪发⁴, 李亚楠⁴, 刘振宇¹, 刘忠宽¹

1. 河北省农林科学院农业资源环境研究所, 河北石家庄 050051;
2. 河北省沧州市渤海新区黄骅市农业农村发展局, 河北沧州 061100;
3. 河北省畜牧良种工作总站, 河北石家庄 050011;
4. 河北省沧州市畜牧技术推广站, 河北沧州 061000

通讯作者: 刘振宇,E-mail:zhenyu416@126.com;刘忠宽,E-mail:zhongkuanjh@163.com
作者简介:张立锋（1991-）,男,汉族,河北南和人,博士,助理研究员,主要从事草地及农田生态系统水碳循环研究,E-mail:qiongkaixin106606@163.com
基金资助:
国家重点研发计划（2022YFD13008）;国家重点研发计划（2021YFD19009）;河北省农林科学院科技创新专项（2022KJCXZX-ZHS-7）;河北省农林科学院科技创新人才队伍建设（C22R1103）;国家牧草产业技术体系（CARS-34）资助

Abstract

Abstract: The coastal saline-alkali lands in Hebei Province have low land utilization and productivity. Due to its tolerance to salinity and poor soil conditions, alfalfa （Medicago sativaL.） is widely cultivated in this area, covering nearly 70 000 hm². To investigate the evapotranspiration （ET） characteristics of alfalfa in this region and the influence of environmental factors and provide a scientific basis for water management, this study employed the Shuttleworth-Wallace model to quantitatively analyze the interannual variation in ET of alfalfa fields at the Cangzhou Comprehensive Experimental Station of China Forage and Grass Research System. The results showed that from 2021 to 2023, the annual ET of alfalfa was 609.9, 644.3, and 678.5 mm, respectively. The daily average ET was the highest during the second and third growth cycles, and the third growth cycle had the greatest total ET. Transpiration accounted for 79.8%, 80.6%, and 80.6% of the total ET in each year, respectively. The variation in ET and soil evaporation was mainly influenced by net radiation, air temperature, and leaf area index, while transpiration was particularly sensitive to changes in net radiation, vapor pressure deficit, and leaf area index. The study indicated that while the region’s precipitation generally met the water needs of alfalfa, there was still an obvious water deficit during the first two growth cycles, and the enhanced water management was necessitated during these stages.

Key words: Coastal saline-alkali land, Rainfed, Alfalfa, Evaporation, Transpiration, Shuttleworth-Wallace model

摘要： 河北省滨海盐碱地土地利用率和产出效益较低,紫花苜蓿（Medicago sativa L.）因其耐盐碱、耐瘠薄的特点,在该地区被广泛种植,种植面积近7万hm²。为研究该地区紫花苜蓿的蒸散特征及环境因子影响,并为其水分管理提供科学依据,本研究利用Shuttleworth-Wallace模型对国家牧草产业技术体系沧州综合试验站内的紫花苜蓿人工草地蒸散年际变化进行了定量研究。结果显示,2021至2023年间,紫花苜蓿年蒸散量分别为609.9,644.3和678.5 mm,在第二茬和第三茬生长期日均蒸散量最高,而第三茬总蒸散量最大,蒸腾量分别占蒸散量的79.8%,80.6%与80.6%。蒸散与土壤蒸发的变化主要受净辐射、空气温度和叶面积指数的影响,蒸腾则对净辐射、饱和水汽压差和叶面积指数的变化反应敏感。研究表明,该地区降水量基本满足苜蓿生长需求,但在前两茬生长期仍存在水分缺口,因此需加强这一时期的水分管理。

关键词: 滨海盐碱地, 雨养旱作, 紫花苜蓿, 蒸发, 蒸腾, Shuttleworth-Wallace模型

CLC Number:

S541.9

ZHANG Li-feng, XIE Nan, CUI Su-qian, SUN Guo-tong, FENG Wei, SHI Jia-qi, PAN Xuan, ZHI Jian-fei, QIN Wen-li, LI Jian-ming, ZHANG Hong-fa, LI Ya-nan, LIU Zhen-yu, LIU Zhong-kuan. Evapotranspiration Characteristics of Alfalfa and Its Influencing Factors in the Coastal Saline-Alkali Land of Hebei Province[J]. Acta Agrestia Sinica, 2025, 33(2): 575-585.

张立锋, 谢楠, 崔素倩, 孙国通, 冯伟, 石嘉琦, 潘璇, 智健飞, 秦文利, 李建明, 张洪发, 李亚楠, 刘振宇, 刘忠宽. 河北滨海盐碱地雨养旱作紫花苜蓿蒸散特性及其影响因子[J]. 草地学报, 2025, 33(2): 575-585.

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Evapotranspiration Characteristics of Alfalfa and Its Influencing Factors in the Coastal Saline-Alkali Land of Hebei Province

河北滨海盐碱地雨养旱作紫花苜蓿蒸散特性及其影响因子

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