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杨树在世界上栽培极广泛,在我国北方也是如此。我区杨树人工林占人工林总面积的64.17％,但是由于气候干旱,严重地影响着树木的成活率。林学家们在六十年代就提出杨树深栽造林,依靠地下水保活的设想。实践证明,深栽造林有以下好处:一是使苗木直接吸收地下水,保证树木成活所需要的水分,二是苗木可以通过切口大量吸水(试验表明:切口吸水量占整体吸水量的95％),加速了树木成活。三是生长快,据赤峰市城郊林场1982、
Poplar cultivation is extremely widespread in the world, as is the northern part of our country. Poplar plantations in my area accounted for 64.17% of the total area of plantations, but due to the arid climate, seriously affecting the survival rate of trees. In the 1960s, forest scientists proposed the idea of poplar planting deep forests and relying on groundwater conservation. Practice has proved that the planted afforestation has the following benefits: First, the direct absorption of seedlings of groundwater to ensure the survival of trees need moisture, and second, seedlings can absorb a large number of water through the incision (test showed that the amount of incision water absorption accounted for 95% of the overall water absorption) Accelerate the survival of trees. Third, fast growth, according to Chifeng suburbs farm 1982,