Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (10): 8-12.doi: 10.11924/j.issn.1000-6850.casb18120113

Special Issue: 小麦

• Research article • Previous Articles     Next Articles

Simulation of Grain Filling Rate of Winter Wheat Under Water and Nitrogen Stress

Yuli Chen1(), Ping Yang1, Fajiang Gong1, Haibin Bi1, Minghui Gao1, Gui Qi1, Huawei Li2()   

  1. (1)Zibo Academy of Agricultural Sciences, Zibo Shandong 255033
    (2)Crop Research Institute, Shandong Academy of Agricultural Sciences, Jinan 250100
  • Received:2018-12-27 Revised:2019-04-10 Online:2020-04-05 Published:2020-03-19

Abstract:

To quantitatively analyze the effects of water and nitrogen stress on winter wheat grain filling rate, we carried out field experiments in 2016-2017 and 2017-2018 growing seasons using winter wheat variety ‘Jimai 22’ under various water and nitrogen application levels. On the basis of experiment data collected in the 2017-2018 growing season, a simulation model of winter wheat grain filling rate under water and nitrogen stress was built by analyzing the influence rule of water and nitrogen stress on winter wheat grain filling rate, as well as introducing the water and nitrogen impact factors, and could be specifically described as: S(j,t)=S(W3N300,t)×(1+FN)×(1+FW). The model was then validated with an independent dataset collected in the 2016-2017 growing season. Except the ratio of mean absolute error (da) to the mean observation (dap), the root mean squared error (RMSE), mean absolute error (da), and correlation (r) all showed that the simulated values were well identical to the measured ones. The model can be used to simulate the effects of water and nitrogen stress on winter wheat growth and yield.

Key words: water and nitrogen stress, winter wheat, grain filling rate, simulation

CLC Number: