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经过换床的苗木,可提高苗木质量,保证造林的成活率。但是,如果掌握不好换床技术,就会造成窝根,使苗木根系呈“丁”形、“L”形、“鸡瓜”形等等。我省现行的换床板,存在很多弊病,如果垂直床面开沟,苗木根系软,垂直沟底根系会自然形成弯曲,造成窝根,同时苗木不易立住,回土时容易挤歪、挤倒;如果开沟壁与床面大于或小于九十度
After changing bed seedlings, seedlings can improve the quality and ensure the survival rate of afforestation. However, if you have a bad grasp of bed changing technology, it will cause littoral, seedling root system was “Ding” shape, “L” shape, “chicken melon” shape and so on. In our province, there are many shortcomings in changing beds. If the bed is ditched perpendicularly and the root of the seedling is soft, the root of the vertical ditch will naturally bend and cause the roots of the nest to grow. At the same time, the seedlings will not easily stand, ; If the ditched walls and the bed are larger or smaller than ninety degrees