论文部分内容阅读
为了适应大面积造林,需要提高造林成活率,减少苗木远距离运输,贯彻“那里造林,那里育苗”的方针,我场在一九七○年在汤王山、铜圪塔山,在块状造林整地内,进行了五十二亩的小块地育苗试验,(每亩下种油松8斤,当年检查每亩产苗2万株)除给造林地内留了足够的苗木,供780亩造林用苗外,并节约育苗整地费用240元。一、育苗地的选择:由于苗木的远距离运输时间比较长,受外界环境的影响和机械损伤,给造林带来不良的影响。我们为了避免这种情况,采取了就地小块地育苗办法,选择的地点在大片造林地的中心区背风、土壤比较肥沃。为了不影响春季造林,在坡向选择方面,选择了阳
In order to adapt to the large-scale afforestation, we need to improve the survival rate of afforestation, reduce the long-distance transportation of seedlings and carry out the policy of “afforestation there, nursery there”. In 1970, in Tangwangshan, Tongli Tashan, In the site preparation, a nursery trial of small plots of 52 mu was conducted (8 kg of Pinus tabulaeformis seedlings per acre and 20000 plants per mu per acre were inspected in that year). In addition to enough seedlings left for the afforestation site for 780 mu of afforestation With seedlings, and save nursery preparation costs 240 yuan. First, the choice of nursery: seedlings of long-distance transport time is longer, affected by the external environment and mechanical damage, afforestation adverse effects. In order to avoid such a situation, we adopted a small-scale nursery on site where the leeward winds in the central area of large-scale afforestation land are more fertile. In order not to affect the afforestation in spring, in aspect choice, choose Yang