Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (28): 89-97.doi: 10.11924/j.issn.1000-6850.casb2021-1028

Special Issue: 生物技术 园艺

Previous Articles     Next Articles

Study on the Prediction Model of the Pollen Initiation Period of Woody Plants in Beijing

WANG Chunling(), YE Caihua(), JIANG Jiang   

  1. Beijing Meteorological Service Center, Beijing 100089
  • Received:2021-10-29 Revised:2022-04-15 Online:2022-10-05 Published:2022-09-28
  • Contact: YE Caihua E-mail:1225653966@qq.com;ych681012@126.com

Abstract:

The paper aims to solve the problem of urban pollen period forecast. In this study, four major woody plants (i.e. Ulmaceae, Cupressaceae, Salicaceae and Pinaceae) in Beijing urban areas were selected as the research objects. Based on four accumulated temperature phenological models (i.e. Spring Warming, Alternating, Sequential and Parallel), using the pollen concentration data of 2012-2019 from Beijing Meteorological Bureau, the pollen period of each plant was modeled. The results show that the pollen start dates of these four woody plants are significantly affected by vernalization, that is, the stimulation of cold temperature in winter would lead to an earlier pollen season in spring. Comparing the results of these four different models, it is found that the optimum model for Ulmaceae, Cupressaceae and Pinaceae is the Alternating model, the RMSE of this model is between 1-3 days, and the determination coefficient R2 is between 91%-95%. However, the best model for Salicaceae is Sequential model, RMSE is less than 2 days, and R2 is 92.8%. This shows that the phenological model based on accumulated temperature can effectively simulate the pollen initiation period of woody plants in Beijing, which has certain significance for the simulation study of plant phenological stage.

Key words: airborne pollen, pollen initiation period, woody plants, Beijing, phenological model

CLC Number: