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三北工程有效遏制风沙蔓延

2018-11-30 16:31:13    新华网

新华社北京11月30日电(记者于文静)三北工程建设40年来,在我国北疆筑起一道抵御风沙、保持水土、护农促牧的“绿色长城”。工程区森林覆盖率由1977年的5.05%提高到13.57%,有效遏制了风沙蔓延态势。

这是记者从30日在北京召开的三北工程建设40周年总结表彰大会了解到的。

20世纪70年代以前,三北地区森林植被稀少、生态状态脆弱、风沙危害严重,水土流失严重,土地生产力极低。1978年,党中央、国务院做出了在西北、华北、东北风沙危害和水土流失重点地区建设大型防护林的战略决策,三北防护林体系建设工程正式启动实施。工程建设期从1978年到2050年,分三个阶段八期工程实施。工程建设范围包括13个省(区、市)的551个县(旗、市、区)和新疆生产建设兵团。

中国科学院发布的《三北防护林体系建设40年综合评价报告》显示,三北工程40年累计营造防风固沙林788.2万公顷,治理沙化土地33.62万平方公里,保护和恢复沙化草原1000多万公顷。

同时,重点治理的黄土高原林草植被覆盖度达到59.06%,年入黄河泥沙减少4亿吨左右,有效控制了水土流失灾害,构筑起农业生态屏障,保护了粮食生产安全,培育了生态富民产业。

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