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固原县地处西北黄土高原丘陵沟壑区,除极少部分地区土层较薄、有盐渍化现象外,绝大部分土层深厚,为发展粮食生产提供了极为有利的条件。但近十多年来,土壤肥力递减,粮食产量逐年下降,亩产只有百斤左右,成为缺粮地区。我们认为,土壤瘠薄是使该地区粮食产量下降的主要原因。瘠薄土壤的现状
Guyuan County is located in the hilly and gully regions of the Northwest Loess Plateau. Except for the extremely thin soil layers and the salinization phenomenon in very few areas, the vast majority of soil layers are deep and provide extremely favorable conditions for the development of grain production. However, over the past decade or so, soil fertility has been declining, grain output has been declining year by year, and only about 100 mu per mu has become a deficient area. In our opinion, the infertile soil is the main reason for the decline in grain output in the area. The status of barren soil