温度变化对湖南水稻产量的影响

用湖南省气象局提供的1999～2008年气象数据分析了湖南温度的变化趋势及湖南1999～ 2008年的水稻产量和温度变化问的关系.结果表明:1999～2008年湖南省温度上升明显,双季稻生长季节的平均温度上升了1.3℃,早稻季的平均温度上升了1.6℃；湘南早稻季产量与平均温度呈显著负相关,湘北双季稻的平均产量与平均温度呈显著正相关,有利于早、晚稻的生长发育和产量的提高.

Effects of Temperature on Rice Yield

Annual crops will be affected by the increases in globally mean surface air temperatures of 1.4-5.8℃towards the end of the 21st century. China seems to have become more temperate, and the most crowded areas show a clear warming trend. Therefore, it is very important that rice production of China contributes not only to food safety of China but also to that of the world. We analyzed weather data at Meteorological Bureau in Hunan Province from 1999 to 2008 to examine temperature trends and the relationship between rice grain yields by using data conduct from Hunan rural statistics yearbook from 1999 to 2008. Here we elucidated that the time trend of temperature increase was significant form 1999 to 2008, mean temperature in entire rice growing-season and early rice growing-season have increased by 1.3℃ and 1.6℃ respectively, during the past 10-years in Hunan province, and a close negative linkage between early rice grain yield and mean temperature in low latitudes. But, there was a strong positive relationship between double-crop rice grain yield and mean temperature in high latitude, and it was favor of early/late rice growth and development as well as grain yield.