A method for estimating yield of maize inbred lines by assimilating WOFOST model with Sentinel-2 satellite data

Frontiers in Plant Science

Plant Science

Xianpeng Hou¹  Junyi Liu¹  Hengbin Wang¹  Yanhua Mu¹  Hai Huang¹  Shuaiming Chen¹  Yuanyuan Zhao²  Zhe Liu²  Xiaodong Zhang²  Shaoming Li²  Jianxi Huang² 

[1]College of Land Science and Technology, China Agricultural University, Beijing, China

[2]College of Land Science and Technology, China Agricultural University, Beijing, China

[3]Key Laboratory of Remote Sensing for Agri-Hazards, Ministry of Agriculture and Rural Affairs, Beijing, China

关键词: maize inbred lines;    WOFOST;    data assimilation;    Sentinel-2;    EnKF;   

DOI  :  10.3389/fpls.2023.1201179

 received in 2023-04-06, accepted in 2023-08-23,  发布年份 2023

来源: Frontiers

【 摘 要 】

Maize is the most widely planted food crop in China, and maize inbred lines, as the basis of maize genetic breeding and seed breeding, have a significant impact on China’s seed security and food safety. Satellite remote sensing technology has been widely used for growth monitoring and yield estimation of various crops, but it is still doubtful whether the existing remote sensing monitoring means can distinguish the growth difference between maize inbred lines and hybrids and accurately estimate the yield of maize inbred lines. This paper explores a method for estimating the yield of maize inbred lines based on the assimilation of crop models and remote sensing data, initially solves the problem. At first, this paper analyzed the WOFOST(World Food Studies)model parameter sensitivity and used the MCMC(Markov Chain Monte Carlo) method to calibrate the sensitive parameters to obtain the parameter set of maize inbred lines differing from common hybrid maize; then the vegetation indices were selected to establish an empirical model with the measured LAI(Leaf Area Index) at three key development stages to obtain the remotely sensed estimated LAI; finally, the yield of maize inbred lines in the study area was estimated and mapped pixel by pixel using the EnKF(Ensemble Kalman Filter) data assimilation algorithm. Also, this paper compares a method of assimilation by setting a single parameter. Instead of the WOFOST parameter optimization process, a parameter representing the growth weakness of the inbred lines was set in WOFOST to distinguish the inbred lines from the hybrids. The results showed that the yield estimated by the two methods compared with the field measured yield data had R2: 0.56 and 0.18, and RMSE: 684.90 Kg/Ha and 949.95 Kg/Ha, respectively, which proved that the crop growth model of maize inbred lines established in this study combined with the data assimilation method could initially achieve the growth monitoring and yield estimation of maize inbred lines.

【 授权许可】

Unknown   
Copyright © 2023 Liu, Hou, Chen, Mu, Huang, Wang, Liu, Li, Zhang, Zhao and Huang