| Analysis of the climatic warming characteristics in recent 50 years and their effects on agricultural production of Shaya County in Xinjiang |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2011.06.45 |
| Key Words: climatic warming agnicultural production Shaya County Xinjiang |
|
| Hits: 163 |
| Download times: 121 |
| Abstract: |
| By using the data of average daily temperature from 1960~2009 provided by Shaya meteorological sta-
tion, regression analysis and trend line analysis were applied to analyze the recent 50 years' annual temperature, accu-mulated temperature≥10℃ and extreme inter-anual and seasonal temperature variation and their impacts on agricul-tural production. The results showed: (1) The annual temperature showed an overall increasing trend, and the linear trend rate was 0.424≥/10a, while the temperature fluctuation was basically consistent with the temperature trends in Northwest China. The seasonal variation of temperature was obvious, and the winter, spring and autumn had a greater contribution to the annual temperature increase. (2) The accumulated temperature
≥10℃ increased， its linear trend rate was 12.302℃/10a, the number of sustained days increased, it increased 27.85 days during the last 50 years. Dur-ing the research period, the extreme maximum temperature basically did not change, but the extreme minimum tempera ture tended to increase, the linear trend rate was 1.497℃/10a. (3) The annual temperature and accumulated tempera-ture increased, it extended the growth period of the themophilic 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 futher north，the north going of multi cropping system, themophilic crop area expansion and the increasing of the multiple crop ping 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，and the increase of temperature in the crop growing period will reduce the accumulation of nutrients in time and the quality. |
|
|
|