RT - TY杂志的年- 2015-07-21摩根富林明当前世界环境乔- SP - OP - VO - 30 - 32 UL - www.a-i-l-s-a.com/article/808/做- 10.12944 / CWE.10.2.13 N2 -列城区位于32-36之间°N 75 - 80°E经度和纬度和海拔从平均海平面以上2500到6000米。列城是该国最大的地区，面积为45100平方公里。农业是这个地区农村人口的主要职业。对数据的初步分析显示，小麦的种植面积自2003年以来一直在增加。值得注意的是，大麦作物种植面积同时减少。值得注意的是，从2003年开始，小麦取代了大麦。这种种植模式的变化与气候条件的变化有关。据观测，从2003年开始，5月日平均最低气温由4°C上升至8°C，直至2007年。同样，在2003年之前，观测到日最高温度的月平均值更高(>20°C)，但在2003至2009年期间下降(范围15至20°C)。在2003年之前的5月份，降雪是一种常见现象，但在2003 - 2009年期间没有观测到降雪。 Therefore, it is hypothesized that increase in both minimum and maximum temperature during May had enabled the farmers to grow wheat in place of barley. Moreover, during the month of April, snowfall events were significantly reduced in 2003-2009 and in month of May snowfall events was not recorded at all. This may perhaps another reason which enabled farmers to sow the wheat crop during last week of April to mid of May. Interestingly during last two years, the cropping pattern is again reversed. The acreage under wheat crop was decreased and the acreage under barley increased. Such reversal may be due to re-occurrence of snowfall events during first two weeks of May, which was absent during 2003-2009. Therefore, it is quite apparent that weather condition influenced the cropping pattern and crop acreage. However, many other factors like timely availability of seed, quality of seeds as per need of local farmers as they prefer some straw producing varieties, crop rotation pattern, etc., also plays some role in shifting of cropping pattern. Long term data base on crop-weather relationship among with the other factors may help in developing crop weather modeling. ER -