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秋季是我区植树造林的一个重要季节。从季节条件讲,由于秋季气温逐渐下降,土壤含水量比较稳定,对苗木的成活较为有利。从苗木生理方面讲,这时苗木落叶并进入休眠期,地上部分的水分蒸腾已达到很低的程度,而根系在土壤中的活动仍在继续进行。因此秋季栽植的苗木到翌春生根发芽早,待晚春干旱时节到来时,苗木已恢复正常生长,增强了抗性,有利于苗木渡过春旱关而成活。特别是在我区中西部春旱严重、
Autumn is an important season for afforestation in our area. From the season conditions, due to the gradual decline in autumn temperatures, soil moisture content is relatively stable, the seedling survival is more favorable. From the nursery physiology point of view, when seedlings deciduous and into dormancy, the above part of the water transpiration has reached a very low level, while the root activity in the soil is still going on. Therefore, seedlings planted in autumn to spring next spring root germination, spring season to be late spring season, the seedlings have returned to normal growth, increased resistance, is conducive to the survival of seedlings crossing the Spring and drought. Especially in mid-western spring drought serious,