要使幼树生长快,除了疏松的土壤外,肥料也是最主要的因素之一。在大面积造林中,想依赖化肥和农家肥是不可能的,因此就地取肥才是切实可行的办法。一般荒山上的土壤,表土中含的有机质、腐殖质比心土中多。在整地工作中保留表土和充分利用表土是促进幼树生长的有效措施。为解决这个问题,我们 To make young trees grow fast, in addition to loose soil, fertilizer is one of the most important factor. In a large area of ​​afforestation, want to rely on fertilizers and farmyard manure is impossible, so take fertilizer on the spot is a viable solution. Generally barren hills of soil, topsoil contains organic matter, humus more than heart soil. Preserving the topsoil and making full use of the topsoil in the site preparation work is an effective measure to promote the growth of the sapling. To solve this problem, we