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1 越冬菠菜死亡的原因1.1 选种不利选用的品种本身抗寒力差,造成幼苗越冬期的自然死亡,这是内在原因。1.2 植株营养不良由于越冬前幼苗生长期间秋雨连绵,低温寡照,植株体内营养积累不足,自由水含量过高,保护组织发育不健全,使植株抗寒力显著下降而造成死亡。1.3 播种过早植株发育阶段已通过,抗寒力下
1 The reasons for the death of overwintering spinach 1.1 Breeding adverse selection of the species itself cold hardiness, resulting in natural deaths over the winter seedlings, which is the inherent reason. 1.2 plant malnutrition before the winter seedling growth during the continuous autumn, low temperature, the accumulation of nutrients in plants lack of body, free water content is too high, protection of tissue development is not perfect, the plant cold resistance decreased significantly and cause death. 1.3 sowing premature stage of plant development has passed, cold resistance