砂姜黑土严重缺磷是当前影响农业生产水平迅速提高的限制因素。根据砂姜黑土和当地农业气候的主要生态特点,增施磷肥,适量配施氮肥是合理施肥的基本前提。两年来,我们对砂姜黑土以磷肥为中心的小麦施肥技术进行了初步探讨。试验土壤为重壤质中位砂姜黑土,有机质含量1.02%,全氮0.089%,速效P_2O_52—3PPm,有效钾(K_2O)155ppm,pH7.6。前作为薯茬麦豌混播,平均亩产250斤 The serious deficiency of phosphorus in lime concretion black soil is currently the limiting factor that affects the rapid increase of agricultural production. According to the main ecological characteristics of Shajiang black soil and local agro-climatic conditions, it is the basic prerequisite for rational fertilization to add phosphate fertilizer and proper amount of nitrogen fertilizer. In the past two years, we conducted a preliminary study on wheat fertilization using limestone as the center. The soil tested was sandy loam with mid-loamy limestone. The contents of organic matter were 1.02%, total nitrogen 0.089%, available P_2O_52-3PPm, available potassium (K_2O) 155ppm and pH7.6. Before as potato crop broadcast wheat peas, an average yield of 250 pounds