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敖汉旗从一九八○年以来试验推广机引开沟犁整地造林。近三年,机械开沟造林已成为全旗国营、集体、专业户个人造林的主要形式,每年开沟造林面积占全旗造林面积的百分之五十左右。到一九八五年夏,全旗共开沟造林五十多万亩。五年多的实践证明,机械开沟造林同一般穴植造林相比,有成活率高、保存率高、省劳力、省投资、速度快、幼树长势好等优点。是充分发挥机械效能,加快发展林业生产的好办法。特别对于风沙干旱、土质瘠薄地区发展林业生产有重要意义。地处科尔沁沙地东南端的敖汉
Aohanqi pilot test machine since 1980 to open ditch plows afforestation. In recent three years, mechanical ditching and afforestation has become the main form of individual afforestation of state, collective and specialized households in the entire banner. Each year, the area of ditching and afforestation accounts for about 50% of the afforestation area of the whole county. By the summer of 1985, the entire county had dredged more than 500,000 mu of open forests. More than five years of practice have proved that mechanical ditching and afforestation have the advantages of high survival rate, high conservation rate, labor-saving, provincial investment, fast growth and good young saplings compared with the general planting and planting. It is a good way to give full play to the mechanical efficiency and accelerate the development of forestry production. Especially for the wind and sand droughts, infertile soil development of forestry is important. Aohan is located in the southeastern end of Horqin sandy land