Author_Institution :
Sch. of Geographic Sci. & Tourism, Xinjiang Normal Univ., Urumqi, China
Abstract :
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
By using the observations of daily temperature from 1954 to 2009 provided by Shache meteorological station, this paper applied regression analysis and trend line analysis to analyze the recent 56 years´ annual temperature, accumulated temperature ≥10°C and extreme inter-annual and seasonal temperature variation and its impact on agricultural production. The results show (1) during the last 56 years, the annual temperature has an overall increasing trend, and the linear trend rate was 0.22°C/10a, the temperature fluctuations were basically consistent with the temperature trends in Northwest China. The seasonal variation of temperature was obvious, and the winter, spring and autumn have a greater contribution to the annual temperature increase. (2) during the last 56 years, the accumulated temperature >10°C increased, its linear trend rate was 5.62°C/10a, number of sustained days increased, it increased 13.42 days during the last 56 years. During the research period, the extreme maximum temperature basically did not change, but the extreme minimum temperature tended to increase, the linear trend rate was 0.49°C/lOa. (3) the annual temperature and accumulated temperature increased, it extended the growth period of the thermophilic crops. The average temperature in winter, especially the rise of the extreme minimum temperature is conducive to the extending of northern boundaries of winter crops to north, the north going of multi-cropping system, thermophilic crop a- ea expansion and the increasing of the multiple cropping index. But this increased the winter soil moisture evaporation which resulted in the decrease of pupae over wintering eggs disease mortality, this will increase the difficulty of pest control, the increase of temperature in the crop growing period will reduce the accumulation of nutrients in time and the quality.
Keywords :
agricultural engineering; crops; global warming; meteorology; regression analysis; Shache County; Shache meteorological station; Xinjiang; agricultural production; climatic warming; inter-annual temperature variation; multi-cropping system; regression analysis; seasonal temperature variation; temperature fluctuations; thermophilic crop area expansion; Educational institutions; Climatic warming; Shache County, Xinjiang; agricultural production;
