摘要
在香蕉种植网室内,研究了网室内外作物蒸散量和参考作物蒸散量的关系,以及网室内小气候变化对参考作物蒸散量的影响。研究结果显示,网室内参考作物蒸散量(ET0)和A级蒸发皿水面蒸发量分别比大田减少39%和42%,网室内香蕉树蒸腾量较网室外下降53%。网室内净辐射降低和风速减小是网室内香蕉树蒸腾量和参考作物蒸散量降低的主要原因,而网室内温度和饱和水汽压差变化对蒸散量的影响较小。建立了网室内参考作物蒸散量和网室内外水面蒸发量的关系,计算出该地区的A级蒸发皿系数为0.84。
A field experiment was conducted in a banana-cultivation screenhouse to study the change and relationship between crop evapotranspiration and reference crop evapotranspiration （ET0）. The effects of microclimatic factors inside the screenhouse on ET0 were also analyzed. Results show that ETo and Class-A pan-evaporation inside the screenhouse respectively decrease by 39% and 42% in comparison with those in the open field. Also, banana transpiration in the screenhouse decreases by 53% in comparison with those in the open field. Reductions in banana transpiration, ETo and pan-evaporation inside the screenhouse are mainly due to the decreases in net radiation and wind speed. Air temperature and vapor pressure, on the other hand, exert a minimal reduction effect on ETo. A regression relation exists between screenhouse and open-field ETo and pan-evaporation. The statistical Class-A pan-coefficient for the study area is 0.84.
出处
《中国生态农业学报》
CAS
CSCD
北大核心
2009年第3期484-488,共5页
Chinese Journal of Eco-Agriculture
基金
国家自然科学基金项目(50509025)资助
关键词
网室
露地
参考作物蒸散量
蒸发皿蒸发量
蒸腾
香蕉
Screenhouse, Open-field, Reference crop evapotranspiration, Pan-evaporation, Transpiration, Banana
