氮、磷、钾施肥配比对桂闽引象草产量和品质的影响

以桂闽引象草为材料,采用三因素三水平正交优化设计试验,研究不同施肥水平下桂闽引象草农艺性状、产量及营养品质的变化,以探讨施肥对桂闽引象草的影响。结果表明,桂闽引象草通过合理的氮、磷、钾施肥配比,能够达到较好的生产效果,综合分析,组合N20P10K20的施肥效果最佳,即在N20kg/667m^2、P10kg/667m^2、K20kg/667m^2的施肥配比下,桂闽引象草年鲜草产量达11267.5kg/667m^2,折合干草产量为2520.7kg/667m^2,比对照(无肥处理)分别增产39.74%和46.30%,粗蛋白含量12.68%,比对照增加25.60%。

Effects of Nitrogen,Phosphorus and Potassium Ratio of Fertilizer on Yield and Quality of Pennisetum purpureum Schum cv.Guiminyin

In order to assess the effect of fertilization on yield and quality of Pennisetum purpureum Schum cv.Guiminyin,the variations of agronomic traits,yield and nutritional quality of Pennisetum purpureum Schum cv.Guiminyin under different fertilization levels were characterized using orthogonal design experiment with three factors and three levels.The results showed that good comprehensive production performance was obtained via optimization of the nitrogen,phosphorus and potassium ratio of fertilizer.The fertilizer combination of N20P10K20 had the best fertilization effect.With the fertilization ratio of N 20 kg/667 m^2,P 10 kg/667 m^2 and K 20 kg/667 m^2,the annual fresh grass yield of Pennisetum purpureum Schum cv.Guiminyin reached up to 11 267.5 kg/667 m^2,and the converted hay yield was 2 520.7 kg/667 m2,which were increased by 39.74% and 46.30% compared to the CK (without fertilization treatment),respectively.The crude protein content was 12.68% and was increased by 25.60% compared with the CK.