柱花草菠萝皮混合青贮发酵品质研究

研究柱花草菠萝皮不同比例混合青贮发酵品质。试验设4个处理，分别为100 %柱花草单独青贮(CK)、70 %柱花草+30 %菠萝皮(SP1)、60 %柱花草+40 %菠萝皮(SP2)、50 %柱花草+50 %菠萝皮(SP3)，青贮30 d后开窖取样，测定青贮饲料发酵品质。结果表明：与对照组相比，柱花草与菠萝皮混合青贮显著提高了乳酸含量，显著降低了pH值、丁酸和氨态氮/总氮，提高了发酵品质；各混合组随菠萝皮混合比例增大，乳酸增多，pH值和丁酸降低；SP2、SP3处理组pH值、乙酸、丙酸、挥发性脂肪酸和氨态氮/总氮无显著差异。从发酵品质和菠萝皮利用角度出发，50 %菠萝皮和柱花草混合青贮是可行的。

Fermentation Quality of Mixed Silages of Stylosanthes guianensis and Pineapple Peel

Fermentation quality of mixed silages of Stylosanthes guianensis and pineapple peel was studied. Treatments were combinations of S. guianensis with pineapple peel at the following ratios: 100 : 0 (CK, 100% S. guianensis), 70 : 30 (SP1), 60 : 40 (SP2) and 50 : 50 (SP3) (fresh weight basics). The silos were open on 30 days after ensiling and the fermentation quality was measured. The results showed that, all mixed silages were well preserved. The mixed silages significantly increase lactic acid and decreased pH value, butyric acid contents and AN/TN as compared with control. The LA content increased and pH value, butyric acid contents decreased with the ratio of pineapple peel increasing. There were no significant differences pH value, acetic acid, propionic acid, volatile fatty acids contents and AN/TN between SP2 and SP3. In conclusion from the present study, that mixing 50% S. guianensis and 50% pineapple peel are recommended for fermentation quality utilization efficacy.