苎麻入冬以后到翌年3月,由于气候寒冷,地上部分枯萎而死,地下部分为了适应低温条件,发生了一系列生理上的变化。即呼吸作用减弱,细胞内可塑性物质增加,原生质粘度增大,处于休眠状态,或者进行缓慢的孕芽、盘芽等生理活动。特别是麻蔸上向上生长的龙头根和因水土流失露出地面的根蔸,容易遭受突然的冰冻造成组织坏死,形成弱蔸缺蔸,影响翌年苎麻产量和 After the winter ramie to March next year, due to the cold climate, the ground part of the withered and died, the underground part in order to adapt to low temperature conditions, a series of physiological changes. That is, weakened respiration, increased intracellular plasticity, increased viscosity of protoplasm, dormancy, or slow gestational buds, disk buds and other physiological activities. In particular, the upward growth of mulberry on the leading root and soil erosion due to the ground exposed roots, are susceptible to sudden freezing of tissue necrosis, the formation of weakness, affecting the following year ramie output and