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一、黄土丘陵地区旱地育苗的意义。苗木供应是影响该地区开展造林事业的一个重要问题,目前很多地方造林任务大,苗木不足。据调查了解,该地区育苗技术上存在下面三个问题:1、苗圃常选择不当,水源不足,旱地育苗多遭径流冲污或苗木生长不良;2、一股的苗木产量低、规格差;3、育苗树
First, the hilly area of Loess Plateau seedling significance. The supply of nursery stock is an important issue that affects afforestation in this region. At present, there are many afforestation tasks and insufficient seedlings in many areas. According to the survey, there are three problems in seedling raising in this area: 1, nursery often improper selection, insufficient water resources, dry nursery and more runoff pollution or poor growth of nursery stock; 2, a stock of seedlings with low yield and poor specification; 3 Nursery trees