Characteristics of Dry-wet Climate Change and Its Impacts on the Yield of Rice, Sugarcane and Peanut in Zhanjiang Area, Guangdong, China
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2023, Vol. 44 ›› Issue (7): 1506-1514.DOI: 10.3969/j.issn.1000-2561.2023.07.022

• Agricultural Ecology & Environmental Protection • Previous Articles     Next Articles

Characteristics of Dry-wet Climate Change and Its Impacts on the Yield of Rice, Sugarcane and Peanut in Zhanjiang Area, Guangdong, China

ZHAO Baoshan1,2,3, DOU Meian2,3,4, AN Dongsheng1,2,3,4, YAN Chengming1,2,3,4, MA Haiyang1, HUANG Song5, SU Junbo1,*()   

  1. 1. South Subtropical Crops Research Institute, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524091, China
    2. Zhanjiang Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Zhanjiang, Guangdong 524091, China
    3. Zhanjiang Experimental and Observation Station for National Long-term Agricultural Green Development, Zhanjiang, Guangdong 524091, China
    4. Guangdong Modern Agriculture Cultivated Land Conservation and Water-saving Agriculture Industrial Technology Research and Development Center, Zhanjiang, Guangdong 524091, China
    5. Nanjing Automation Institute of Water Conservancy and Hydrology, Ministry of Water Resources, Nanjing, Jiangsu 210012, China
  • Received:2022-08-01 Revised:2022-10-31 Online:2023-07-25 Published:2023-07-24
  • Contact: * SU Junbo,E-mail:junbosu@126.com

Abstract:

Exploring the characteristics of dry-wet climate change and its impacts on crop yield can provide scientific basis for agricultural production planning and meteorological disaster prevention under climate change. Based on the daily ground observation data of meteorological stations in Zhanjiang area from 1960 to 2020 and the statistical data of rice, sugarcane and peanut yields from 1990 to 2020, the aridity index calculated by reference crop evapotranspiration (ET0) and precipitation were used as drought index to analyze the characteristics of dry-wet climate change, and the impact of dry-wet climate change on crop yield was analyzed. The results showed that the interannual variation of precipitation in Zhanjiang area fluctuated greatly, and the annual average precipitation was 1534.41 mm, showing an insignificant rising trend. The temperature rised significantly at the rate of 0.18 ℃/10 a, and the annual average ET0 and aridity index was 1242.72 mm/a and 0.87 respectively, showing an insignificant upward trend. According to the annual variation of the dryness index, from January to April and from October to December were the drought prone periods in Zhanjiang. The yield of rice, sugarcane and peanut showed a significant growth trend in the past 31 years, the increase of aridity index in April would reduce the yield of the three crops. The increase of aridity index in May would significantly increase the yield of peanut, but had no significant impact on the yield of the other two crops. The increase of temperature and the decrease of precipitation in June were conducive to the significant increase of rice and peanut yield. Sugarcane yield was not significantly affected by the change of temperature and precipitation, while the increase of dryness index in December significantly increased sugarcane yield. The results are of great significance for Zhanjiang and its surrounding areas agriculture to cope with climate change and improve the crop potential productivity.

Key words: climate change, reference crop evapotranspiration, aridity index, precipitation, crop yield

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