有机肥与化肥配施对低产田苜蓿产量、品质和经济效益的影响

Effect of combination of organic and chemical fertilizers on yield,quality and economic efficiency of low-yielding alfalfa fields

采用田间试验,研究不同有机肥水平及配施化肥对低产田苜蓿的产量、营养品质及经济效益的影响。结果表明,施肥对低产田苜蓿草产量具有显著影响(P<0.05),不论单施有机肥还是配施磷钾肥,苜蓿产量均得到提高,有机肥配施磷钾肥的3个处理显著提高苜蓿产量,第1、2茬苜蓿产量均以处理OF3PK增产最高,与对照相比分别增加了278.16%、276.54%,与其余各处理间差异显著(P<0.05)。有机肥与磷钾肥配施能明显改善苜蓿营养品质,其中,粗蛋白含量得到显著提高,中性洗涤纤维和酸性洗涤纤维含量显著降低,综合分析,处理OF3PK苜蓿营养品质最佳。产投比以处理OF2PK最高,OF3PK次之,均有较好的经济效益。通过对苜蓿产量、营养品质及经济效益的综合全面的分析,处理OF3PK在实际大田生产中更适合进行推广。

The effect of combined application of organic fertilizer with different application levels and P,K fertilizers on the yield,nutrient quality and economic efficiency of lower yield alfalfa（Medicago sativa L.）was studied in field.The result indicated that the fertilization showed a significant impact on the low-yielding fields of alfalfa（P〈0.05）,both single application of organic fertilizer and mixed with P and K fertilizers increased alfalfa yields to varying degrees.3treatments of organic fertilizer combined with P,K fertilizers significantly increased the yield of alfalfa,the hay production of OF3 PK treatment was the highest,which was increased by278.16% and 276.54% compared to CK,it was also significantly higher than the rest treatments（P〈0.05）.The application of organic fertilizer combined with P,K fertilizers could significantly improve alfalfa quality as well,and it could significantly increase the crude protein content and decrease the neutral detergent fiber and acid detergent fiber contents.The output ratio of OF2 PK treatment was the best,and followed by OF3 PK.Both OF2 PK and OF3 PK treatments showed a better economic efficiency.