一、前言在林业建设中影响造林事业发展的一个很关键性的问题是造林成活率较低。影响造林成活率的因素很多,其中一个很主要原因是苗木在运输和裁植过程中根系失水,裁植后枝干失水。为了提高造林成活率,国外一些先进国家采用了高吸水剂处理苗木根系,防止苗木根系失水,取得了良好的效果。高吸水剂是一种高分子聚合物。它能吸收自身重量数百倍乃至数千倍的水,吸水后成凝胶状态,稍加压力不逸出,干燥后又能恢复原状。国外一些国家对高吸水剂在多方面进行了研究,并已用于农业、林业、化工、医药、食品等生产。吉林省石油化工研究所已试制出几 I. Preface A key issue that affects the development of afforestation in the construction of forestry is the relatively low survival rate of afforestation. Many factors affect the survival rate of afforestation, one of the main reasons is that seedlings in the transport and planting process of root loss of water, water loss after stems. In order to improve the survival rate of afforestation, some advanced foreign countries have adopted the super absorbent polymer seedlings root system to prevent seedling roots dehydration, and achieved good results. Superabsorbent is a kind of polymer. It can absorb hundreds of times its own weight or even thousands of times the water, into a gel state after absorbing water, a little pressure does not escape, and then restore the status quo after drying. Some foreign countries on the superabsorbent in many aspects of research, and has been used in agriculture, forestry, chemical, pharmaceutical, food and other production. Jilin Petrochemical Institute has trial-produced a few