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八十年代以来,随传统有机肥施用减少及作物产量提高,氮化肥投入增加,磷钾肥相对较少,造成土壤氮磷钾养分比例失调,已成为作物增产的主要限制因子,氮肥的经济效益也有下降。为此,我们在小麦上进行了氮磷钾不同施用配比对产量及其经济效益影响的研究,为大面积生产提供科学依据。1 材料与方法 试验于1996年秋播在我市花桥镇顺扬村进行,土质黄泥土,土壤含有机质3.04％,全氮0.167％,碱解氮146.8mg/kg,速效磷8.5mg/kg,速效钾78.
Since the 1980s, with the decrease of traditional organic fertilizer application and the increase of crop yield, the increase of input of nitrogen fertilizer and the relatively small amount of phosphorus and potassium fertilizer resulted in the imbalance of N, P and K in soil, which became the main limiting factor of crop yield increase. The economic benefits of N fertilizer also included decline. For this reason, we conducted a research on the effects of different NPK fertilizers on yield and economic benefits on wheat and provided a scientific basis for large-scale production. Materials and methods The experiment was conducted in the autumn of 1996 in Shunyang Village, Huaqiao Town. The soil was composed of yellow soil with soil organic matter 3.04%, total nitrogen 0.167%, alkaline hydrolysis nitrogen 146.8mg / kg, available phosphorus 8.5mg / kg, Potassium 78.