丰润县位于冀东石灰岩丘陵山区,油松为主要造林树种。而该区一般春季干旱少雨,春季造林难成活,而雨季植苗造林,为确保成活率,除培育苗木外,还需大工程整地、浸根或浇水等措施,因而造林成本较高。为解决上述问题,我们经过多年试验,研究总结出油松早春顶凌直播造林技术,使造... Fengrun County is located in Jidong limestone hills, pine as the main afforestation species. In general, the area is arid and dry in spring, and afforestation is difficult to survive in spring. However, in order to ensure the survival rate in the rainy season, afforestation is still costly due to such measures as land preparation, dipped roots or watering in addition to cultivating seedlings. In order to solve the above problems, after years of experiments, we concluded that the Pinus tabulaeformis early spring top forest afforestation technology, so that ...