龙泉县位于浙南山区,境内山峦起伏、地形复杂、海拔高度相差悬殊。而栽培水稻在海拔145-1300米的山峦地带均有分布,就是一个公社、甚至是一个大队,栽培水稻也分布于不同的海拔高度上。由于各地光、温、水等气象条件的差异,使作物生长季节及气象条件对作物生长的影响也不同。就是同一地,也由于单季稻能生长的时间长,栽培时间相差也较大。因此,难以找出影响产量的关键期和主要气象因子,给产量预报带来了困难。而预报一地或者一个大队的产量意义又不大,也不可能各个山峦地带都作预报。本文根据各气象因素年际之间存在着一 Longquan County is located in the southern Zhejiang mountains, the territory of ups and downs, complex terrain, disparities between the altitude. The cultivation of rice in the 145-1300 meters above sea level are distributed in the mountains, is a commune, or even a brigade, cultivation of rice are also distributed at different altitudes. Due to differences in meteorological conditions such as light, temperature and water, crop growth season and meteorological conditions have different effects on crop growth. Is the same, but also because of single-season rice can grow a long time, cultivation time difference is also larger. Therefore, it is difficult to find out the key period and major meteorological factors that affect the yield, which brings difficulties to the forecast of production. It is impossible to predict the yield of a single brigade or a single brigade and it is not possible to forecast all the mountainous areas. This article according to the meteorological factors exist between years