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甘蔗是一种热带高产作物,全生育期要求处於13—30℃的气温条件下,需要活动积温6500℃以上。甘蔗耐霜冻能力差,气温低於0℃就会遭受冻害;生苗温度要求较高,最低需在13℃以上,在田间状态下,气温达到20℃时才能正常生苗,25℃左右为生苗最适温度;生根温度较低,10℃时根点就能很好萌发生长;甘蔗糖份迅速累积期(即甘蔗工艺成熟期)要求气温13—17℃,昼夜温差最好为10℃。由於甘蔗生育期间对气温要求比较严格,这就决定了各地蔗区甘蔗的适宜种植期和收获期。在我省自然条件情况下,蔗农的习惯:南北盘江红水河蔗区一般为春种春收,赤水河蔗区一般为春种冬收或早春收,都柳江乌江蔗区一般为春种冬收或晚春收。
Sugarcane is a tropical high-yield crop, the whole growth period requires the temperature in the 13-30 ℃ conditions, the need for activity accumulated temperature above 6500 ℃. Sugar cane frost resistance is poor, the temperature is below 0 ℃ will suffer frost damage; seedling temperature higher, the minimum required above 13 ℃, in the field state, the temperature reaches 20 ℃ when the normal seedlings, 25 ℃ or so live The optimum temperature for seedling emergence is that the rooting temperature is low and the root can grow well at 10 ℃. The rapid accumulation period of sugar cane (ie the mature stage of sugarcane) requires temperature 13-17 ℃ and the temperature difference between day and night is 10 ℃. As the sugarcane growth during the more stringent temperature requirements, which determines the sugarcane planting sugarcane area around the harvest and harvest period. In our province under the conditions of natural conditions, sugarcane farmers habit: North and South Panjiang Hongshui River sugarcane area is generally spring and spring harvest, Chishui River sugarcane area is generally closed in spring or early spring harvest, all Liujiang Wujiang sugarcane area is generally spring and winter harvest Or late spring income.