种植山苗为什么容易死亡？ Why is planting mountain seedlings so easy to die? 一般的施工人员都知道山苗种植成活率很低，但是随着大乔木的日渐减少，尤其是个别大乔木苗圃已难觅，所以不得不用山苗。 General construction personnel all know mountain seedling planting survival rate is very low, but as the big trees are declining, especially large individual trees nursery has been difficult to find, so had to pick up the mountain. 分析原因： Analysis of reasons: 1.由于环境的因素决定了山苗大多是直根系，长期依靠一个主根或多个主根向下生长。如果移植，主根切断，树体自身的水养分流失，根压减小，不能吸收土壤中的水养分而导致死亡。 Because of environmental factors, the mountain seedlings are mostly straight roots, and have long relied on one main root or several main roots to grow. If the implant is transplanted, the main root is cut off, the tree body loses its own water nutrient, and the root is small enough to absorb water nutrients in the soil and cause death. 2.山上土层较薄，树木间的生存竞争使得树木的根系扎根很远，如果移植，能带的有效须根很少。 The soil is thinner on the hills, and the competition for living in the trees has made the roots of the trees very far. 3.一般山上的生长环境较好，水份充足，湿度较高，排水又好，土壤多偏酸性，较适合苗木生长。如果移植，苗木不能及时适应种植地的环境。 The growth environment of the general mountain is better, the water is abundant, the humidity is higher, the drainage is good, the soil is more acidic, more suitable for seedwood growth. If transplanted, the plant cannot adapt to the environment in time. 4.山上的土壤多混有石块，所以苗木起挖，打泥球技术难度很大。 The soil on the mountain is mixed with rocks, so it is difficult to dig and make mud.