19 Jul 2023
 | 19 Jul 2023
Status: this preprint is currently under review for the journal ESSD.

ChinaRiceCalendar-Seasonal Crop Calendars for Early, Middle, and Late Rice in China

Hui Li, Xiaobo Wang, Shaoqiang Wang, Yuanyuan Liu, Zhenhai Liu, Shiliang Chen, Qinyi Wang, Tongtong Zhu, Lunche Wang, and Lizhe Wang

Abstract. Long-time series and large-scale crop calendars provide valuable information for rational crop cultivation and management under climate change scenarios as a prerequisite for ensuring regional food security. Although some Chinese rice phenological products exist, there is a lack of studies on the long rice cropping calendar for early, middle, and late rice according to the actual cropping dates. Unlike in-situ monitoring and statistical rice phenology information, long-time series medium-resolution remote sensing satellite images provide the possibility and accuracy of real-time crop phenology monitoring. Based on MODIS data products and the improved PhenoRice algorithm, this study obtained phenological information on rice in seven major agricultural zones in China from 2003 to 2020. First, to effectively explore the changes in rice growing seasons over 18 years, we identified early, middle, and late rice according to specific cropping dates. Second, we selected 30 % of the recorded phenology data from Agricultural Meteorological Stations (AMSs) for parameter calibration and added a season division module to the PhenoRice algorithm to obtain a 250 m resolution raster dataset of rice crop calendars named ChinaRiceCalendar. However, it is consistent with the station data, RiceAtlas, and ChinaCropPhen1km. The validation accuracy R2 exceeded 0.95, 0.75, and 0.7 with the data recorded from AMSs, RiceAtlas, and ChinaCropPhen1km, respectively. In addition, we observed that the rice planting dates in China were delayed by 2.4 days/10a while the maturity dates were earlier by 5.5 days/10a during 2003–2020. ChinaRiceCalendar provides insights into practical rice farming measures and the response of rice cropping dates to environmental conditions across China.

Hui Li et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-125', Chen Zhang, 20 Aug 2023
  • RC2: 'Comment on essd-2023-125', Anonymous Referee #2, 21 Aug 2023
  • RC3: 'Comment on essd-2023-125', Anonymous Referee #3, 09 Sep 2023

Hui Li et al.

Data sets

ChinaRiceCalendar Hui Li, Xiaobo Wang, Shaoqiang Wang, Yuanyuan Liu, Zhenhai Liu, Shiliang Chen, Qinyi Wang, Tongtong Zhu, Lunche Wang, Lizhe Wang

Hui Li et al.


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Short summary
As one of the major rice producing countries, China has obvious regional differences in rice types and planting patternsIn this study, the 2003–2020 Chinese seasonal rice calendar extracted from remote sensing data and other data is used to prove that the planting period of rice in China is significantly delayed and the maturity period is advanced. The results will provide data support for rice management and related industry development under future climate scenarios in China.