论文部分内容阅读
利用2000~2012年的气象资料和玉米产量数据,研究气候变化对玉米产量的影响。结果表明:玉米生长季节积温和平均最高温度平均每年分别下降2.344℃和0.0132℃;最低温度和降雨量呈上升趋势,平均每年分别增加0.0261℃和9.5676mm;玉米产量变化与生长季节平均最高温度变化呈显著负相关(P<0.05),近十年玉米生育期内积温每上升10℃导致关中西部玉米减产9.8%。平均最高温度的变化是影响关中西部半湿润区玉米产量变化的关键因素。
Using the meteorological data from 2000 to 2012 and corn production data, we study the impact of climate change on corn yield. The results showed that the accumulated temperature and average maximum temperature decreased by 2.344 ℃ and 0.0132 ℃ respectively during the growing season, while the minimum temperature and rainfall increased by 0.0261 ℃ and 9.5676mm respectively. The changes of maize yield and the average maximum temperature during growing season (P <0.05). For every 10 ℃ increase of accumulated temperature in maize during the recent ten years, the corn yield in western Guanzhong dropped by 9.8%. The change of average maximum temperature is the key factor that affects the yield of maize in the semi-humid area of western Guanzhong.