JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (4): 609-620.doi: 10.11849/zrzyxb.20170435

• Resource Evaluation • Previous Articles     Next Articles

Study on the Change of Rice Yield in Hanzhong Basin under Climate Change

HU Hui-zhi1,2, LIU Xiao-qiong1, WANG Jian-li2   

  1. 1.College of Urban and Environment, Northwest University, Xi’an 710127, China;
    2. School of Geographical Science, Southwest University, Chongqing 400715, China
  • Received:2017-05-10 Revised:2017-08-23 Online:2018-04-10 Published:2018-04-10
  • Supported by:
    National Social Science Foundation of China, No. 16XGL015;Humanities and Social Science Project of Shaanxi Provincial Education Department, No. 16JK1737.

Abstract: Deep analysis of change of rice production under climate change in Hanzhong Basin could explore the main meteorological factors affecting rice production, meanwhile provide a scientific basis for the prevention and control of meteorological disasters during the local rice growing season. In order to investigate the main meteorological factors affecting rice growth in the study area, this paper extracted rice yield during 1951-2014 years in Hanzhong Basin based on the data of daily temperature, precipitation, accumulated temperature, diurnal temperature range and meteorological yield of rice per unit area. The methods of linear trend, trend coefficient, HP filter and Morlet wavelet analysis were used synthetically to analyze the trend of meteorological yield of rice and meteorological factors during growing season in Hanzhong Basin and calculate the significant cycle of rice meteorological yield and main meteorological elements sequence. The results were as following: 1) In Hanzhong Basin, the trend of the mean temperature and active accumulated temperature above 10 ℃ in rice growing season (April-September) tended to rise during the last 64 years, and the daily temperature range tended to decrease, while the trend of precipitation was not obvious. 2) The significant cycle analysis of the meteorological elements and the rice meteorological yield per unit area in Hanzhoung Basin showed that the first main cycle of rice meteorological yield per unit area corresponds to the second main cycle of each meteorological element, having a principal period of about 13-14 years. 3) The impacts of various meteorological factors on the yield of rice are different, and the dominant meteorological factors affecting the meteorological yield of rice are different in different climatic background. The research results could provide a reference for the development of rice planting and local economic and social development in Hanzhong Basin.

Key words: climate change, Hanzhong Basin, meteorological yield of rice, trend coefficient, wavelet analysis

CLC Number: 

  • S511