我区南接秦岭,北连黄龙、乔山,构成了山、原、川三个自然类型。全区山地、丘陵、沟壑面积大,水土流失严重。解放后,广大干部群众积极响应毛主席“绿化祖国”的号召,充分利用发展林业的优越条件,植树造林累计保存面积185.6万亩,四旁植树4亿多株,建设农田林网面积375.9万亩。许多地方,已郁闭成林,起到了用材、防护的作用。为了获得造林成活及速生丰产,我们采用了一些新的林业科学技术成果,如反 My area south of Qinling, north of Huanglong, Joe Hill, constitute the mountain, the original, Sichuan three natural types. The mountains, hills, gully area, soil erosion is serious. After the liberation, the vast number of cadres and the masses responded positively to Chairman Mao’s call for “greening the motherland,” making full use of the favorable conditions for developing forestry. The accumulated area for tree planting and afforestation was 1,856,000 mu, planting more than 400 million trees on four sides and building 3,759,000 mu of farmland and forest net. In many places, it has become a forested land and has played a timber and protective role. In order to obtain afforestation survival and fast-growing and high-yielding, we have adopted some new achievements in forestry science and technology,