A “3414” field experiment of Canna edulis was carried out to build a fertilization model and provide scientific basis for formulated fertilization. The results showed that fertilizing is beneficial to promote plant growth, increase the number of fillering, yield and starch content, but has little effect on root weight. High fertilizing amount of nitrogen is beneficial for plant growth but not for starch content increase, P and K fertilizer are beneficial for yield and starch content increase. The fertilization model is y=37 301.6-19.6x1 + 125. lx2 + 78.9x3-0.07x(21)-0.80x(22)-0.17x(33) +0.24x1 x2 +0.20x1 x3 +0.05x2x3. It is needed to increase N fertilizing amount and add P and K fertilizing amount in the major producing area of Canna edulis. The optimum fertilizing amount of N,P and K fertilizer were 360 kg/hm2 , 120.7 kg/hm2and 315 kg/hm2 ,respectively.%为构建芭蕉芋施肥模型和配方施肥提供依据,进行了芭蕉芋"3414"田间肥效试验.结果表明:施肥有利于植株生长,可增加分蘖,提高产量和淀粉含量,对根重影响较小;高氮有利于植株生长,不利于淀粉含量的增加,磷钾有利于产量和淀粉含量的提高.施肥模型为y＝37301.6-19.6x1+125.1x2+78.9x3-0.07x21-0.80x22-0.17x23+0.24x1x2+0.20x1x3+0.05x2x3.贵州芭蕉芋主产区施肥要适量增施氮肥,补磷补钾,建议芭蕉芋最佳施肥量为N 360 kg/hm2、P 120.7 kg/hm2、K 315 kg/hm2.
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