Publications

Wang, HN; Zhang, J; He, LH; Huang, D; Chi, H (2022). Monitoring and Assessing Gross Primary Productivity of Paddy Rice (Oryza sativa L.) Cropland in Southern China Between 2000 and 2015. INTERNATIONAL JOURNAL OF PLANT PRODUCTION, 16(4), 579-593.

Abstract
Paddy rice is an important grain production in the world. Southern China experienced substantial losses in paddy rice area over the last three decades in traditionally cropping area. As gross primary production (GPP) is a proxy of land productivity, study on its spatial-temporal dynamics is helpful to understand effect of cropping practices on variation of rice grain production. In our study, Moderate Resolution Imaging Spectroradiometer (MODIS) data and meteorological data were combined to drive Vegetation Photosynthesis Model (VPM) for estimating GPP in paddy rice fields of southern China (Hubei province) during 2000-2015 at 1 km spatial resolution. Paddy fields area was varied by the influence of industrialization and urbanization of the region as well as changes in aquaculture area during the 16 years. Annual GPP showed significant increasing trends during 2000-2004 and 2009-2015, and sharply decreasing trend from 2004 to 2009. The assessment of relationship between annual GPP and grain production of paddy rice at municipal-scale and provincial-scale during 2000-2015 demonstrated the potential of annual GPP derived from satellite-based GPP model as a tool to estimate annual rice grain production in the region. The analysis of spatial-temporal pattern of rice GPP demonstrated a high correlation between cropping frequency of paddy rice and mean annual GPP of paddy rice along the main rivers of Hubei province, which provided positive suggestions for promote the production of paddy rice cultivation in sustainable development.

DOI:
10.1007/s42106-022-00215-2

ISSN:
1735-8043