摘要
根据波文比能量观测系统在2017—2020年间的ET_(c)观测数据,分别对FAO-56作物系数模型(S-k_(c))与Priestley-Taylor(PT-α)模型进行参数率定及修正,分析了茶树ET_(c)在各生育期内对气象因子的响应特性,并评估了修正后的S-k_(c)与PT-α模型对于苏南丘陵地区茶园的应用效果.研究表明:S-k_(c)模型的作物系数k_(c)在茶树生长初期为0.83、中期为1.19、后期为1.06,PT-α模型系数α年均值为1.09;气温、水汽压差及土壤体积含水率对ET_(c)的影响在0.05的水平下具有统计学意义,且各气象因子对ET_(c)的相关性均表现为在茶树生长中期高度相关,生长后期偏低;以波文比能量观测系统的ET_(c)观测数据作为参照,修正后的S-k_(c)模型高估了茶树ET_(c),PT-α模型低估了ET_(c),但PT-α模型的误差(R^(2)=0.91)稍低于S-k_(c)模型(R^(2)=0.88),S-k_(c)模型的模拟效果在茶树快速生长期(MAE=0.72 mm/d,RMSE=0.99 mm/d)和生长中期(MAE=0.36 mm/d,RMSE=0.48 mm/d)较好,PT-α模型的模拟效果在茶树生长后期(MAE=0.35 mm/d,RMSE=0.23 mm/d)较好.该研究明确了苏南丘陵地区茶树各生育期ET_(c)的变化特征和模拟手段,对于苏南丘陵地区茶树实现科学生产具有重要参考价值.
Based on the ET_(c) data measured by Bowen ratio energy balance method from 2017 to 2020,the parameters of crop coefficient(S-k_(c))model and Priestley-Taylor(PT-α)model were detemined and modified respectively.The response characteristics of ET_(c) to meteorological factors in each growth period were analyzed.And the applicability of the modified models to simulate ET_(c) in tea plants in southern Jiangsu Province was evaluated.Results show that crop coefficient k_(c) of S-k_(c) model is 0.83,1.19 and 1.06 at the early,middle and late growth periods,respectively,and the annual mean value of PT-αmodel coefficientαis 1.09.The meteorological factors T_(a),VPD and VWC are significantly correlated with ET_(c).The overall meteorological factors and ET_(c) are highly correlated in the middle growth period and less correlated in the late growth period.The S-k_(c) model overestimates ET_(c) measured by Bowen ratio energy balance method as a reference,and PT-αmodel underestimates ET_(c).While the error of PT-αmodel(R^(2)=0.88)is lower than that of S-k_(c) model(R^(2)=0.91).The precision of the PT-αmodel is higher in the rapid growth period(MAE=0.72 mm/d,RMSE=0.99 mm/d)and the late growth period(MAE=0.35 mm/d,RMSE=0.23 mm/d),and the precision of S-k_(c) model is higher in the middle growth period(MAE=0.36 mm/d,RMSE=0.48 mm/d).The results of this study indicate the variation characteristics and methods of ET_(c) in whole growth.It is of great reference value to the scientific production of tea trees in hilly areas of southern Jiangsu Province.
作者
倪雨欣
张川
闫浩芳
张文程
周俊安
薛润
NI Yuxin;ZHANG Chuan;YAN Haofang;ZHANG Wencheng;ZHOU Junan;XUE Run(School of Agricultural Engineering,Jiangsu University,Zhenjiang,Jiangsu 212013,China;National Research Center of Pumps,Jiangsu University,Zhenjiang,Jiangsu 212013,China)
出处
《排灌机械工程学报》
CSCD
北大核心
2022年第12期1290-1296,共7页
Journal of Drainage and Irrigation Machinery Engineering
基金
“十四五”国家重点研发计划项目(2021YFC3201103)
国家自然科学基金资助项目(41860863,51509107,51609103)
水文水资源与水利工程国家重点实验室一带一路专项基金资助项目(2020nkzd01)
江苏省博士后科研资助项目(Bs510001)
江苏省农业装备与智能化高新技术重点实验室开放基金资助项目(JNZ201917)
中国水利水电科学研究院内蒙古阴山北麓草原生态水文国家野外科学观测研究站开放研究基金资助项目(YSS2022011)。
