前言华北、西北、內蒙等地的干旱地区及沙区,往往育苗、造林成活率低和生长量不高,严重地影响林业生产事业的发展。因此,探讨提高林木的抗旱性,是一件迫切而重要的工作。在这方面內蒙、新疆等地农民,用浸水的方法提高林木成活率取得了丰富的经验,有关方面曾有报导和总结。作者经过几年试验研究和参考有关材料,提出用浸 Preface The arid areas and sandy areas in North China, Northwest China and Inner Mongolia often have low seedling survival rates and low growth rates, which seriously affect the development of forestry production. Therefore, to explore ways to improve the drought resistance of trees is an urgent and important task. In this regard, peasants in Inner Mongolia and Xinjiang have gained rich experience in using waterlogged methods to improve the survival rate of trees, and relevant authorities have reported and summarized them. The author after several years of experimental study and reference to the material, proposed dip