１３年砂姜黑土定位监测结果表明：有机肥与无机肥配合施用，能提高土壤肥力和作物产量，改善和提高品质。长期单施Ｎ、Ｐ化肥，导致钾素养分含量下降，物理性状变劣和产量不稳。长期单施有机肥，能改善土壤理化性状，提高土壤肥力，但产量只能维持在一定水平，很难高产。小麦、玉米连作年亩产９６１．３ｋｇ籽粒，平均亩投入氮素３５ｋｇ、磷素（Ｐ２Ｏ５）１３．７９ｋｇ、钾素（Ｋ２Ｏ）１１．８５ｋｇ。 The monitoring results of 13 years of Shajiang black soil indicate that the combination of organic fertilizer and inorganic fertilizer can improve soil fertility and crop yield and improve and improve quality. Long-term single application of N, P fertilizers, resulting in decreased nutrient content of potassium, deterioration of physical properties and yield instability. Long-term organic fertilizer alone, can improve soil physical and chemical properties, improve soil fertility, but the output can only be maintained at a certain level, it is difficult to high yield. The average annual output of wheat and corn is 961.3 kg per mu, with the average input of 35 kg of nitrogen, 13.79 kg of phosphorus (P2O5) and 11.85 kg of potassium (K2O).