Journal of Northern Agriculture ›› 2020, Vol. 48 ›› Issue (3): 109-116.doi: 10.12190/j.issn.2096-1197.2020.03.17

• Corp cultivation·Physiology and biochemistry • Previous Articles     Next Articles

Applicability evaluation on calculation method of reference crop evapotranspiration in Hinggan League

YIN Chunyan1, ZHAO Ju1, LIU Hu2, LI Bin1, QI Yinglong1   

  1. 1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. Institute of Water Resources for Pastoral Area,Ministry of Water Resources,Hohhot 010020,China
  • Received:2020-04-09 Online:2020-06-20 Published:2020-08-14

Abstract: 【Objective】To provide an effective way for saving water resources,optimizing irrigation system and saving cost and increasing efficiency in agricultural production,by the suitable calculation method of Reference Crop Evapotranspiration(ET0) in Hinggan League,Inner Mongolia.【Methods】Based on the data of four weather stations in Hinggan League,the daily ET0 values from 1973 to 2018 were calculated by using Priestley-Taylor method (PT method) and Hargreaves-Samani method (HS method).According to the Root Mean Square Error (RMSE) and Relative Error (RE),the applicability of the calculation results by PT method and HS method in the daily,monthly and annual time series in different weather stations were evaluated,taking ET0 value calculated by FAO56 Penman-Monteith method (PM method) as standard.【Results】In Hinggan League,PT method and HS method could replace PM method to calculate ET0 in different time scales,and RSEM daily value>monthly value>annual value,RE daily value>monthly value>annual value.On the daily scale,the results of PT method and HS method were the most close to those of PM method,especially the determination coefficient R2 of PT method was more than 0.99.【Conclusion】In the absence of meteorological data,the daily data could be used to calculate ET0 in Hinggan League by PT method and HS method.

Key words: Reference crop evapotranspiration, Hinggan League, Correlation analysis, Calculation method

CLC Number: 

  • S275.3