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2007年顺义区农科所针对西瓜、生菜、西红柿等顺义区优势作物开展测土配方施肥反馈试验研究,结果表明,推荐施肥显著降低了氮、磷肥料的施用,其中纯氮降低了7.688kg/667m2、五氧化二磷降低了5.1655kg/667m2,适当提高了钾肥的施用,氧化钾增加了3.0085kg/667m2,累计节肥9.845kg/667m2;推荐施肥使氮、磷、钾配比更趋合理,推荐施肥N∶P2O5∶K2O=17.8∶7.1∶9.4,而传统比例为N∶P2O5∶K2O=25.5∶12.3∶6.4,促进了作物的增产,累计平均增产7.8%,平均增收247.34元/667m2。在6种作物的20个试验中,推荐施肥比传统施肥显著降低了氮、磷肥料的施用,其中纯氮降低了7.69kg/667m2,五氧化二磷降低了5.17kg/667m2,适当提高钾肥的施用,氧化钾增加了3.01kg/667m2,累计节肥9.85kg/667m2,促进了作物的增产,平均增产7.82%,平均增收247.34元/667m2。
The results showed that recommended fertilization significantly reduced the application of nitrogen and phosphorus fertilizers, in which pure nitrogen decreased by 7.688 kg / 667m2, phosphorus pentoxide decreased by 5.1655kg / 667m2, the appropriate increase in the application of potash, potassium oxide increased by 3.0085kg / 667m2, total fertilizer 9.845kg / 667m2; recommended fertilization to make the ratio of nitrogen, phosphorus and potassium more reasonable , Recommended fertilization N: P2O5: K2O = 17.8: 7.1: 9.4, while the traditional ratio of N: P2O5: K2O = 25.5: 12.3: 6.4, which promoted the increase of crop yield with an average increase of 7.8% and an average increase of 247.34 yuan / 667m2. In 20 experiments of 6 crops, the recommended fertilization significantly reduced the application of nitrogen and phosphorus fertilizers than the traditional fertilization, in which pure nitrogen decreased 7.69kg / 667m2, phosphorus pentoxide decreased 5.17kg / 667m2, the appropriate increase of potassium Application, potassium oxide increased by 3.01kg / 667m2, cumulative fertilizer 9.85kg / 667m2, and promote crop yield, with an average yield of 7.82%, an average increase of 247.34 yuan / 667m2.