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我场管辖面积81万亩,灌木林面积很大。为了改造这类林分,1974年我们在阳坡进行了油松造林试验,成活不错。但由于阳坡土壤瘠薄,干旱,条件较差,油松造林技术复杂,成本太高,不宜大面积生产造林。1975年我们又进行了杜梨阳坡造林试验,面积10亩,成活率达100%,生长情况也比油松好(表1)。
My field jurisdiction area of 810000 acres, shrubs area is very big. In order to rebuild this kind of stand, in 1974, we carried out the Pinus tabulaeformis afforestation experiment on the sunny slope, which has done a good job. However, due to barren, arid and poor conditions on sunny slopes, Pinus tabulaeformis afforestation technology is complicated and the cost is too high, so it is not suitable for large-scale afforestation. In 1975, we also conducted afforestation experiments on the sunny slope of Du Li, with an area of 10 mu and a 100% survival rate. Growth was also better than that of Pinus tabulaeformis (Table 1).