仙草氮磷钾施肥效应及其适宜用量研究

Studies on Fertilization Effect and Suitable Amounts of Nitrogen,Phosphorus and Potassium on Hsian-tsao

为探索不同氮磷钾肥施肥量对仙草产量的影响,应用"3414"设计方案进行氮磷钾肥效田间试验。结果表明:对仙草产量影响效应大小的肥料种类依次为钾肥>氮肥>磷肥;根据肥料效应函数,结合当地仙草生产实际,仙草最高施肥量为N 200.7 kg/hm2、P2O594.7 kg/hm2和K2O 262.5 kg/hm2,最高产量为11089 kg/hm2,三要素最佳比例为1:0.47:1.3;最佳经济施肥量为N 193.7 kg/hm2、P2O588.4 kg/hm2和K2O 241.4 kg/hm2,最佳经济产量为11072.4 kg/hm2,三要素最佳比例为1:0.46:1.25。仙草生产中应重视氮磷钾肥的配合施用,应采用磷含量较低、氮钾含量较高的复合肥。

In order to study the effect of different fertilizing amount of nitrogen, phosphorus and potassium onthe yield of Hsian-tsao, we made field fertilization experiment of nitrogen, phosphorus and potassium by the＂3414＂design. The results showed that the effect of fertilizer types on the yield of Hsian-tsao was in an orderas： potassium〉nitrogen〉phosphorus. According to the established function of fertilizer efficiency and thelocal production practice of Hsian-tsao, the highest fertilizing amount of Hsian-tsao was N 200.7 kg/hm2, P2O594.7 kg/hm2 and K2O 262.5 kg/hm2. The highest yield was 11089 kg/hm2, and the best rate of fertilization, N：P2O5：K2O was 1：0.47：1.3. The optimum economic fertilizing amount was N 193.7 kg/hm2, P2O588.4 kg/hm2andK2 O 241.4 kg/hm2, and the optimum economic yield was 11072.4 kg/hm2, and the best rate of fertilization, N：P2O5：K2O was 1：0.46：1.25. In the Hsian-tsa production, attention should be paid to the combined application ofnitrogen, phosphorus and potassium. The compound fertilizer of low- content phosphorus, high- contentnitrogen and potassium should be recommended.