Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (9): 105-111.doi: 10.11924/j.issn.1000-6850.2014-2315

Special Issue: 油料作物 园艺 农业气象

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Influence of Climate Change on Oilseed Rape Production in Chongqing

Huang Hualei1, Zhou Yan1, Li Huanmei2, Liu Tao1, Liu Kang2, Shi Youming1   

  1. (1Characteristic Crop Research Institute of Chongqing Academy of Agricultural Sciences, Chongqing 40216;2Chongqing Yongchuan Meteorological Bureau, Chongqing 402160)
  • Received:2014-08-25 Revised:2014-08-25 Accepted:2014-09-16 Online:2015-04-07 Published:2015-04-07

Abstract: In order to study the relationship between Chongqing special eco-climatic conditions and the development of rapeseed production based on meteorological data and rapeseed production situation in 2005-2013 in Chongqing, the authors analyzed the climate change in recent 30 years in Chongqing and its impact on rapeseed production. The results showed that: in the analysis period, Chongqing's average annual temperature change showed an ascending trend, sunshine hours showed significant decreasing trend (through the significant test at 0.05 level). Rainfall mutations occurred frequently, and the linear trend was not obvious; but rainfall between adjacent years showed significant differences, rainfall in 1998 reached 1363.5 mm which was the most in the analysis period and acted as a mutation point, then decreased. The correlation between index of sclerotinia rot and average temperature of March and April was -0.682*, reached significant level, while the correlation between index of sclerotinia rot and rainfall and sunshine hours was not obvious. Temperature had a significant negative correlation with oilseed rape area in Chongqing (P=-0.568*), but no significant correlation with yield. Sunshine hours had negative correlation (P=-0.544*) with oilseed rape yield, but no significant correlation with oilseed rape area. Linear trend of rainfall was not obvious, and the precipitation difference between adjacent years was great and its correlation with oilseed rape area and yield were not significant.