黑山县为l『改变过去植埘造林工作中只栽不管,树木成活率很低的不良现象,成立了27个营林大队,对全县720万株树实行了承包责任制,并大力发展林业专业户,植树木成活率提高了20％、保存率提高30％以上,全县基本形成了林网化,确保了生态平衡,促进了粮食增产。△黑山县半拉门乡郝家? In order to change the past adverse effects of plantation and plantation in the past and low tree survival rates, Montenegro set up 27 silvicultural units and contracted responsibility system for the 7.2 million trees in the county and vigorously developed forestry Professional households, tree survival rate increased by 20%, the preservation rate increased by 30% or more, the county basically formed a forest network, to ensure ecological balance and promote grain yield. △ Montenegro half-door town Hao home?