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黔东北的江口县,是一个重要的粮油产区。全县黄红壤瘦田占稻田总面积的17％,这类稻田常年亩产稻谷200—300斤,最低只几十斤,比当地一般田稻谷产量相差一倍以上,是阻碍全县稻谷产量大幅度提高的重要原因。近几年来,通过重点试验,多点示范和大面积推广相结合普遍搞样板的办法,大力推广使用磷肥(过磷酸钙,下同)和种植绿肥改良黄红壤瘦田,取得了显著的效果。一般单产可提高100—200斤,深受群众欢迎。
Jiangkou County, northeast of Guizhou, is an important grain and oil producing areas. County red soil lean accounted for 17% of the total area of paddy fields, such rice paddy per capita annual output of 200-300 pounds of rice, the lowest only a few pounds, more than double the local production of paddy more than doubled, is hindered the county large paddy production An important reason for the increase in amplitude. In recent years, we have made remarkable efforts to promote the use of phosphate fertilizer (superphosphate, the same below) and planting green manure to improve the soils of yellow-red soils through key experiments, multi-point demonstration and large-scale promotion. General yield can increase 100-200 kg, welcomed by the masses.