绝大多数深根性播种的实生苗都是主根深扎而侧根须根很少,加之起苗时不能完全保留主根长度,因而减弱了深根性苗木扎根成活的能力,降低了造林成活率。我们经反复试验证明,摘除发芽种子的胚根根尖能大大提高这些实生苗萌发侧、须根的能力,从而提高造林成活率。此法简单、可行,具体操作如下:一、大粒种子类,如核桃,文冠果等,可在播种时,掐掉其发芽种子的胚根根尖,约15 Most of the deep-rooted seedlings are rootstocks with deep roots and few root-side roots. When combined with the seedlings, the length of the main roots can not be completely preserved, which weakens the ability of deep-rooted seedlings to survive and reduce the survival rate of afforestation. We have repeatedly tested that root tips of germinating seeds can greatly improve the germination of these seedlings germination side, fibrous roots, thereby increasing the survival rate of afforestation. This method is simple and feasible, the specific operation is as follows: First, the large seeds, such as walnuts, the crown of fruit, etc., can be sown at the time, pinch off the root tips of germinating seeds of radicle, about 15