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山东省文登市从上世纪80年代开始对天然赤松林进行封山育林,此后对人工林也进行封育。主要采取全封与半封相结合,留苗与养树相结合,疏残林补植与改建相结合,乔、灌、草结合生防与化防结合等多种措施。主要效果:全市2.1万hm2瘠薄丘陵林木郁闭度达到0.6以上,节约造林费9000万元;封山育林形成混交林,节省防治费每年达4095万元;全市林地每年可多蓄水4300多万t,减少水土流失1120多万m3,使5万多hm2良田和1.8万hm2果园得到范灌溉。
Wendeng City, Shandong Province, started to seal off natural forests of Pinus densiflora in the 1980s and then closed the plantations. The main combination of full closure and semi-seal, combined with retaining seedlings and raising trees, sparse forest replanting and rebuilding combined with Joe, irrigation, grass combined with biological and chemical prevention and prevention and other measures. The main effect: The city’s 21000 hm2 barren hills and forests canopy density of 0.6 or more, saving 90 million yuan afforestation; closing hillsides afforestation to form a mixed forest, save up to 40.95 million yuan annual prevention and control costs; the city’s forests can be more than 4300 million t of water per year, Reduce soil erosion by more than 11.2 million m3, and provide more than 50,000 hm2 fertile fields and 18,000 hm2 orchards for irrigation.