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通过天柱县2009～2010年4个白菜“3414”田间肥效试验,综合分析了白菜中、低产量水平施用氮、磷、钾肥的配比及用量。结果表明:当白菜产量在4 000～5 000 kg/666.7 m2时,N、P2O5、K2O的平均施用量分别为21.92、13.34、16.21 kg/666.7 m2,氮、磷、钾施用比例为N∶P2O5∶K2O=1∶0.61∶0.74。当白菜产量小于4 000 kg/666.7 m2时,N、P2O5、K2O的平均施用量分别为19.11、8.75、10.20 kg/666.7 m2,氮、磷、钾施用比例为N∶P2O5∶K2O=1∶0.45∶0.53。
The fertilization experiment of 4 cabbage “3414” in Tianzhu County from 2009 to 2010 was conducted to comprehensively analyze the ratio and amount of nitrogen, phosphorus and potassium fertilizer applied in middle and low yield cabbage. The results showed that the average application rates of N, P2O5 and K2O were 21.92, 13.34 and 16.21 kg / 666.7 m2 respectively when the output of cabbage was between 4 000 and 5 000 kg / 666.7 m2. The ratio of nitrogen, phosphorus and potassium was N: P2O5 : K2O = 1: 0.61: 0.74. When the cabbage yield was less than 4 000 kg / 666.7 m2, the average application rates of N, P2O5 and K2O were 19.11, 8.75 and 10.20 kg / 666.7 m2, respectively, and the N, P2O5: K2O ratios were 1: 0.45 : 0.53.