低温常常造成苗木冻害、霜害或寒害,受害轻则局部冻枯,重则整株死亡。用冻害苗木造林(如杉木等),由于失去顶端优势,高生长明显受阻,林木生长高低不齐,林分分化加速,森林生产率低,严重影响造林效果。苗木在入冬之前和冬寒期间,怎样做好防冻保护?主要是从两个方面着手:一方面要严格控制苗木生长,搞好肥水管理,提早并充分促使苗木木质化,从而提高抗寒能力。另一方面要采取有效的保暖防冻措施。根据我 Low temperatures often result in frost damage, frost damage or cold damage, local cold and light damage, while the whole plant died. Frost damage to seedlings afforestation (such as fir, etc.), due to the loss of the top edge, significantly inhibited high growth, uneven growth of trees, rapid differentiation of forest stand, forest productivity is low, seriously affecting the afforestation effect. Before winter and winter cold seedlings, how to do a good job of frost protection? Mainly from two aspects: on the one hand to strictly control the growth of seedlings, fertilizer and water management to do well, early and fully promote seedling lignification, thereby enhancing the ability of cold . On the other hand to take effective warm and antifreeze measures. According to me