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一九六五年至一九六六年间,我们在林科所附近土壤比较瘦瘠干旱的山地上,用撩壕造林的方法,成功地营造了四十多亩杉树速生丰产试验林。实践证明,采用这种方法造林,不但杉树生长快,六年便可成材,还便于实行林粮间种,增产粮食。所谓撩壕造林,就是在山地上,根据地形和造林株行距的要求,沿水平方向,每隔一定距离,横山挖掘一道道壕沟,将壕沟中瘦瘠坚实的底土全部挖出,再填回比较疏松肥沃的表土,然后进行造林。我们搞撩壕种杉有两种规格:大撩壕深一尺半,宽二尺;小撩壕深一尺,宽一
From 1965 to 1966, we fortified more than 40 acres of fast-growing and high-yield trials of pine forests with trenches and afforested forests in the leaden and arid mountainous areas near Linco. Practice has proved that using this method of afforestation, not only fast growth of cedar, six years can be made of timber, but also to facilitate the implementation of inter-species forest, grain production. The so-called moat afforestation is in the mountains, according to the topography and planting line spacing requirements, along the horizontal direction, at regular intervals, Hengshan excavation of a trench, the trenches in the thin barren solid subsoil all digging, and then fill back Loose fertile topsoil, then afforestation. We engage in teeming, there are two kinds of specifications: big tee deep foot one and a half, wide two feet; small terse deep one foot, width one