摘要
基于称重式蒸渗仪及土壤蒸发器实测数据分析了温室秋茬茄子植株蒸腾量(T)、土壤蒸发量(E)和总蒸散量(ET)的逐日动态变化规律,采用Pearson相关分析法研究了温室茄子耗水状况与主要气象因子的相关关系,采用通径分析原理分析了气象因子对T、E和ET的直接和间接作用,并建立了多元回归方程。结果表明:温室秋茬茄子全生育期ET为254.91 mm,其中T和E分别为134.97 mm和119.54 mm,占总蒸散量的53.1%和46.9%。温室秋茬茄子T、E和ET随生育期推进均呈单峰曲线变化,茄子苗期以地表蒸发为主,占总蒸散量的57.13%,开花坐果期和成熟期茄子植株蒸腾显著增加,地表蒸发与总蒸散量的比值降低为40.99%和41.61%。平均温度(Tavg)、相对湿度(Rh)、饱和差(VPD)和太阳辐射(Rs)是影响温室秋茬茄子耗水的主要气象因子。VPD和Tavg分别是影响T的主要决策因子和次要决策因子,Rh为间接限制因子;Rh为影响E的主要限制因子;VPD对ET起主要决策作用,Rs起次要决策作用。气象因子与ET之间的回归关系为:ET=0.714+0.786 VPD+0.017 Rs,相关系数达0.77,可用于ET的估算,研究可为温室秋茬茄子高效生产下的环境调控和智能化灌溉提供科学依据和决策参考。
Based on the measured data of the weighing lysimeter and the soil evaporator,the dynamic changes of the evapotranspiration(T),surface evaporation(E)and total evapotranspiration(ET)of eggplant plants in the greenhouse in autumn were analyzed,and the Pearson correlation analysis method was used to study the relationship between the water consumption of eggplant in the greenhouse and the main meteorological factors,the path analysis principle was used to analyze the direct and indirect effects of each meteorological factor on T,E and ET,and a multiple regression equation was established.The results showed that the ET of the whole growth period of the autumn eggplant in the greenhouse was 254.91mm,of which T and E were 134.97mm and 119.54mm,respectively,accounting for 53%and 47%of the total evapotranspiration.The T,E and ET of eggplants in the autumn in the greenhouse all showed a single-peak curve with the growth period.The surface evaporation of eggplants was dominated by surface evaporation,accounting for 57.13%of the total evapotranspiration.The transpiration of eggplant plants during the flowering and fruit setting and mature periods increased significantly.The ratio of evaporation to total evapotranspiration decreased to 40.99%and 41.61%.Average temperature(Tavg),relative humidity(Rh),saturation difference(VPD)and solar radiation(Rs)are the main meteorological factors that affect the water consumption of eggplants in the greenhouse.VPD and Tavg are the main and secondary decision-making factors that affect T,Rh is the indirect limiting factor;Rh is the main limiting factor that affects E;VPD plays a major decision-making role in ET,Rs plays a secondary decision-making role.The regression relationship between meteorological factors and ET is ET=0.714+0.786 VPD+0.017 Rs,with a correlation coefficient of 0.77,which can be used to estimate ET.The research can provide scientific basis and decision-making reference for environmental regulation and intelligent irrigation under the efficient production of autumn eggplant in greenhouse.
作者
杨宜
李银坤
郭文忠
李海平
李灵芝
无
YANG Yi;LI Yin-kun;GUO Wen-zhong;LI Hai-ping;LI Ling-zhi;无(National Research Center of Intelligent Equipment for Agriculture,Beijing 100097,China;College of Horticulture,Shanxi Agricultural University,Taigu 030801,Shanxi Province,China;Key Laboratory of Urban agriculture(North China),Ministry of Agriculture,Beijing 100097,China)
出处
《节水灌溉》
北大核心
2021年第2期47-51,共5页
Water Saving Irrigation
基金
国家重点研发计划项目(2017YFD0201503)
北京市农林科学院创新能力建设专项项目(KJCX20180705)
北京市科技计划课题(D171100007617003)。
关键词
称重式蒸渗仪
温室茄子
蒸散量
气象因子
通径分析
weighing lysimeter
greenhouse eggplant
evapotranspiration
meteorological factor
path analysis
作者简介
杨宜(1994-),女,硕士,研究方向为蔬菜栽培与生理。E-mail:Yangyi9401@163.com;通讯作者:李银坤(1982-),男,博士,副研究员,研究方向为作物水肥高效利用。E-mail:lykunl218@163.com。
