大兴沟林区春秋两季干旱严重,加上地处三乡一镇的包围之中,人烟较稠密,管护困难,历年造林成活率较低,补植造林任务很大,平均要占造林面积的20%。为了提高补植造林的质量,减少苗木运搬的损失浪费,我们在更新造林的同时,每隔5～6行,设一行一穴植双株的贮存苗行,两株苗 Daxing Gou forest area in spring and autumn, serious drought, coupled with the township is surrounded by three rural township, more densely populated, management and maintenance difficulties, the survival rate of the past years, lower afforestation, replanting a large afforestation task, an average area of ​​afforestation Of the 20%. In order to improve the quality of replanting and afforestation and reduce the waste and waste of seedling transportation, we set up one row of one-hole planting double-row storage seedling row every 5 to 6 lines while updating afforestation,