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Chinese Agricultural Science Bulletin ›› 2024, Vol. 40 ›› Issue (11): 84-91.doi: 10.11924/j.issn.1000-6850.casb2023-0417

Special Issue: 水稻 农业气象

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Temporal and Spatial Variation of Climatic Production Potential of One Season Rice in Hubei Province in Recent 59 Years

GONG Linxin1(), YANG Xiaoya1,2(), LIU Chunwei1, HE Liang3   

  1. 1 School of Ecology and Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044
    2 Analysis and Testing Center of Nanjing University of Information Science and Technology, Nanjing 210044
    3 National Meteorological Center, Beijing 100081
  • Received:2023-05-31 Revised:2024-01-19 Online:2024-04-15 Published:2024-04-11

Abstract:

In order to study the effects of climate resource changes on climatic production potential of one season rice in Hubei Province, daily surface meteorological data and one season rice growth period data from 28 meteorological stations in Hubei Province during 1961-2019 were used to analyze the spatio-temporal variation of total solar radiation, effective accumulated temperature ≥10 °C and precipitation during the growth period of one season rice. In addition, the stepwise correction method was used to calculate the photosynthesis, light-temperature and climatic production potential of one season rice, and to analyze the spatio-temporal variation rules. The effects of radiation, temperature and precipitation on crop production potential were quantitatively described. The results showed that the solar radiation decreased significantly and the effective accumulated temperature ≥10 ℃ increased significantly during the growth period of one season rice in recent 59 years. The distribution of solar radiation and effective accumulated temperature in Hubei Province was high in the north and low in the south. The interannual variation of precipitation showed an insignificant upward trend, and only southwest of the province was the area with high precipitation value. The mean photosynthesis, light-temperature and climatic potential of rice in one season were 20134.63 kg/hm2, 19434.79 kg/hm2 and 13523.16 kg/hm2, respectively. The photosynthesis and light-temperature production potential showed a significant downward trend in most regions, while the climatic potential production showed an insignificant downward trend. The average climatic tendency rates of the three regions were -39.26 kg/(hm2·a), -35.68 kg/(hm2·a) and -15.76 kg/(hm2∙a), respectively. The decrease of radiation resources led to the decrease of climatic production potential of one season rice in the range of -32.87~-104.51 kg/(hm2·a). A few stations were negatively affected by the change of heat and precipitation resources, most of the stations were positively affected to varying degrees, and the comprehensive climate resources effect was negative. The decrease of climatic production potential of rice in Hubei Province was mainly caused by the decrease of radiation.

Key words: Hubei Province, one season rice, solar radiation, accumulated temperature, climatic production potential