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在湖北主要魔芋产区恩施市开展“3414”肥效试验,初步研究了不同氮磷钾配方施肥对珠芽魔芋(Amorphophallus bulbifer)产量的影响,并成功拟合建立了产量三元二次和一元二次肥料效应方程。结果表明,合理的氮磷钾肥施用量可显著提高魔芋产量,施肥量不足或过量施肥会导致魔芋产量降低;在试验地力土壤条件下,珠芽魔芋最高产量为40 863.4 kg/hm2,此时N、P2O5、K2O的施用量分别为295.1、76.5、193.5 kg/hm2;珠芽魔芋最佳经济产量为40 863.0 kg/hm2,N、P2O5、K2O的施用量分别为290.1、75.5、189.0 kg/hm2。
The “3414” fertilizer experiment was conducted in Enshi City, Hubei Province, to study the effects of different NPK fertilizers on the yield of Amorphophallus bulbifer, and to establish the yield quadratic and monadic Secondary fertilizer effect equation. The results showed that reasonable amount of N, P and K fertilizers could significantly increase the yield of konjac, and the yield of konjac could be decreased due to insufficient fertilization or excessive fertilization. Under the soil conditions tested, the highest yield of konjac was 40 863.4 kg / hm2, P2O5 and K2O were 295.1, 76.5 and 193.5 kg / hm2, respectively. The optimum economic yield of Amorphophallus kamohanensis was 40 863.0 kg / hm2, and the application rates of N, P2O5 and K2O were 290.1, 75.5 and 189.0 kg / hm2, respectively.