我省北部石质山阳坡,立地条件差,日照时间长而强度大,植被盖度小,土壤水分蒸发量大,致使土壤干旱贫瘠,造林保成活己成为老大难问题。造林能否成活的关键之一是栽植后苗木内部的水份平衡有无保证。即苗木本身对水分的消耗和土壤中水份的供应的矛盾能否达到统一。为解决这一矛盾,一般可采取浇水等措施来提高土壤中的含水量,或者采取其它措施来减少各因素对土壤水份的消耗,也有的通过截干、整枝、剪叶等措施来减少苗木对水分的消耗,起到缓和矛盾的目的。但 In the northern part of our province, the stony hill and sunny slope are of poor site conditions, long time of sunshine and high intensity, small vegetation coverage and large amount of soil water evaporation, resulting in poor soil drought and afforestation preservation. One of the keys to afforestation’s survival is whether there is any guarantee of water balance inside the seedlings after planting. That seedling itself on the water consumption and soil moisture supply can contradict the unity. In order to solve this contradiction, measures such as watering can generally be taken to increase the water content in the soil, or other measures can be taken to reduce the consumption of soil moisture by various factors, and some measures such as cutting trunks, pruning and cutting leaves can be taken to reduce Seedlings on the consumption of water, play the role of easing the contradictions. but