摘要
基于2014年双季晚稻生长季稻田气象要素的观测资料,应用波文比-能量平衡法对双季晚稻不同生育期稻田蒸散量进行了估算。研究表明:双季晚稻拔节期-成熟收获期,稻田蒸散量随着晚稻生育期呈逐渐减少的趋势;晴天稻田蒸散量日变化呈单峰曲线,与太阳净辐射量存在着极显著的相关性。双季晚稻拔节期-成熟期日平均蒸散量为7.78 mm/d,该段时期内稻田总蒸散量为451.16 mm。基本能反映稻田季节和日变化特征,但因波文比通量观测系统本身因素的影响,双季晚稻田蒸散量估算值与实际值存在着一定的误差,有待进一步改进和研究。
Based on the observational data of meteorological elements in double-cropping late rice field in growing season of the year 2014, the author used Bowen ratio- energy balance method to estimate the evaportranspiration of double-cropping late rice field in different growth periods. The evapotanspiration of paddy field showed a declining trend along with the growth of double-cropping late rice from jointing stage to mature and harvest stage. On sunny day, the daily change in the evapotanspiration of paddy field pres- ented a single-peak curve, and it had a highly significant correlation with the net solar radiation value. From jointing stage to mature stage of double-cropping late rice, the daily average evapotanspiration of paddy field was 7.78 mm/d, and the total evapotanspira- tion of paddy field within this period was 451.16 mm. The above results could basically reflect the seasonal and daily change charac- teristics of evapotanspiration of paddy field. But due to the impacts of several own factors of Bowen ratio flux observation system, there was a certain error between the estimated value and the actual value of evapotanspiration of double-cropping late rice field, it needed further improvement and researches.
出处
《江西农业学报》
CAS
2015年第11期73-76,共4页
Acta Agriculturae Jiangxi
基金
湖南省气象局科研课题"衡阳农田蒸散量变化特征研究"
"十二五"农村领域国家科技计划长江中游南部(湖南)水稻丰产节水节肥技术集成与示范(2013BAD07B11-04)
中国气象局气象科技创新发展项目"超级稻(双季)高产稳产气象保障技术推广应用"
关键词
稻田
蒸散量
估算
太阳净辐射量
Rice field
Evapotranspiration
Estimation
Research
