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近几年来我国北方春季气候异常干旱,而且还常常会出现沙尘暴天气,说明目前生态条件在日趋恶化。这种恶劣的生态条件对植树造林工作也必然带来很大的困难,有些地方栽植大苗浇2次水都难保成活。因此必须开发新的抗旱造林技术,以适应今后林业生产的需要。我们在2005～2007年开发研究了穴内覆膜、树干缠膜等抗旱造林技术,取得了较好的成效。
In recent years, the spring climate in northern China has an unusually arid climate, and sandstorms often occur, indicating that the current ecological conditions are deteriorating. This harsh ecological conditions will inevitably bring great difficulties to the afforestation work. In some places, it is hard to guarantee the survival of two times of planting large seedling water. Therefore, we must develop new drought-resistant afforestation technology to meet the needs of future forestry production. In 2005 and 2007, we researched and developed drought-resistant afforestation techniques such as cave-in-the-hole film and tree-trunk film, and achieved good results.