甜菜属藜科,是二年生植物。第一年形成肥大的块根和莲座状的丛生叶,第二年抽苔开花结实,形成种子。和其他作物一样,甜菜在生长发育过程中所发生的一切生理生化变化都必须在其所处的环境具有一定的温度条件下进行的。 (一)甜菜的生育与积温根据苏联学者的资料,甜菜生育期间所需要的积温,一般为1,900～3,500℃。但是,由于栽培区所处纬度不同 Beet, Chenopodiaceae, is a biennial plant. The first year formed hypertrophic roots and rosette-shaped clusters of leaves, the second year bolting flowering strong, the formation of seeds. Like other crops, all physiological and biochemical changes that occur in the growth and development of sugar beet must be carried out at a certain temperature in the environment in which it is located. (A) of sugar beet fertility and accumulated temperature According to Soviet scholars, beet growth during the accumulated temperature, usually 1,900 ~ 3,500 ℃. However, due to the different latitudes of the cultivation area