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2006年,北京市土肥站针对春玉米、大白菜等11种优势作物开展了测土配方施肥反馈试验研究,试验结果表明:推荐施肥显著降低了氮、磷肥料的施用,其中纯氮降低了6.5kg/667m2、P2O5降低了4.2kg/667m2;推荐施肥使氮、磷、钾配比更趋合理,推荐施肥N∶P2O5∶K2O=16.9∶6.7∶11.2,而传统比例为N∶P2O5∶K2O=23.3∶11.1∶2.0,促进了作物的增产,累计平均增产9.5%,平均增收180.2元/667m2;推荐施肥显著提高了作物的品质,平均提高了蔬菜维生素C含量11.6%,降低硝酸盐含量5.5%;推荐施肥显著提高了氮磷肥料的利用率,氮的利用率平均提高了8.8%,磷的利用率平均提高了9.7%,减轻了氮磷的过量施用对环境的威胁;推荐施肥在经济价值较高的蔬菜作物上增收节支效果要显著高于粮食作物,蔬菜平均增收节支274.4元/667m2,而玉米等粮食作物只有42.8元/667m2。
Soil and Fertilizer Station of Beijing Municipal Bureau of Soil Science and Technology implemented soil testing and fertilization feedback test on 11 dominant crops such as spring corn and Chinese cabbage in 2006. The results showed that the recommended fertilization significantly reduced the application of nitrogen and phosphorus fertilizers, kg / 667m2, and P2O5 decreased by 4.2kg / 667m2. The recommended fertilization made the ratio of N, P and K more reasonable. The recommended N: P2O5:K2O = 16.9:6.7:11.2, while the traditional ratio is N: P2O5:K2O = 23.3:11.1:2.0, which increased crop yield by 9.5%, with an average increase of 180.2 yuan / 667m2. The recommended fertilization significantly improved the quality of crops with an average increase of 11.6% in vegetable vitamin C content and a 5.5% reduction in nitrate content. ; Recommended fertilization significantly increased the utilization of nitrogen and phosphorus fertilizers, nitrogen utilization increased by an average of 8.8%, phosphorus utilization increased by 9.7% on average, reducing the nitrogen and phosphorus over-application of the threat to the environment; recommended fertilization in economic value Higher vegetable crops income and expenditure control effect was significantly higher than food crops, vegetables, the average income and save 274.4 yuan / 667m2, while the corn and other food crops only 42.8 yuan / 667m2.