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地面有坡度是形成水土流失的自然因素,在大的地形上,人类不可能将坡地改造成平地,但在局部地形上,人们完全可能将长坡变短坡,使高差分段集中,坡地变平地,避免和减少水土流失,改变生产条件,提高土地的生产率。修水平梯田(包括水平条田、水平埝地),就是这种生产实践。黄土高原大部分耕地都是坡地,黄河中游有耕地1.85亿亩,其中山塬耕地1.30亿亩,占70%。解放后党和政府领导群众有计划的平田整地,截止1978年底已经修成水平梯田和水平条田近4000万亩。这些水平梯田和条田能够保持水土,增加生产,无论从理论上和实践上都已得到证实,为群众所了解。但修了水平梯田,高差集中的地
It is impossible for humans to transform the slope into a flat ground on a large terrain. However, on the partial topography, it is entirely possible to shorten the long slope, concentrate the elevation section, and change the slope Avoid and reduce soil and water loss, change production conditions and increase land productivity. Repair horizontal terraces (including the horizontal bar, horizontal bar), is the production practice. Most of the arable land in the Loess Plateau is sloping land. There are 185 million mu of cultivated land in the middle reaches of the Yellow River, of which 130 million mu are farmland in the mountainous plateau, accounting for 70%. After the liberation, the party and the government led the masses to plan the leveling of the fields in Hirado. By the end of 1978, they had already repaired nearly 40 million mu of terraces and horizontal fields. These horizontal terraces and fields can keep their soil and water and increase their production. They have been confirmed both in theory and in practice and are known to the masses. But the repair of the terraces, height difference concentrated