秋季是我区主要的造林季节之一。实践证明,秋季栽植大苗,只要技术措施得当,同春季一样,可以收到良好的效果。我区秋季栽植大苗,有着明显的不利因素,这就是苗木地上部分要经过一个冬季,容易失水干枯。但是,秋季造林也有许多有利因素。从气候上来看,这时气温逐渐下降,大气相对湿度较大,大风日数较少,苗木失水和土壤蒸发都较春季缓慢;从树木生理特点上看,由于根系活动要求的温度比地上部分低,所以在苗木落叶后,根系仍 Autumn is one of the main afforestation season in our district. Practice shows that seedlings planted in autumn, as long as the proper technical measures, the same with the spring, you can receive good results. My area planted big seedlings in autumn, with obvious negative factors, which is the part of seedlings to go through a winter, easy to dry dehydration. However, afforestation in autumn also has many advantages. From the climate point of view, when the temperature gradually decreased, the relative humidity of the atmosphere is larger, the number of gale days less, seedling water loss and soil evaporation are slower than the spring; from the tree physiological characteristics, the temperature required for root activity than the aerial part of the low , So after the seedlings deciduous roots still