苜蓿方捆袋贮饲料品质评价

doi:10.3864/j.issn.0578-1752.2018.13.014

Abstract

Abstract: 【Objective】 Rectangular bale silage is one pattern of alfalfa silage, which has a greater flexibility with transport and feeding. The technique of big-bale silage is, however, prone to locally spoilage in the face or in the core, because the plastic bag is easily broken. Evaluation to the bale silage quality would provide a theory basis for choosing the alfalfa silage pattern and its application in feeding. 【Method】 Non-spoilage alfalfa silage samples were taken from rectangular bales which the plastic bag were broken or not broken, from upper layer, middle layer and lower layer. Microbial colony numbers, nutrient composition and fermentation quality were compared. Two evaluation systems of V-Score and Kariser were used to evaluate alfalfa bale silage fermentation quality. 【Result】 The dry matter (DM) content of alfalfa bale silage was 43.86%-45.47%, crude protein (CP) was above 21%, natural detergent fiber (NDF) was 35.87%-37.42%, acid detergent fiber (ADF) was 30.68%-31.79%, Ash was 8.37%-8.50%, and water soluble carbohydrate (WSC) was 0.46%-0.53%. The DM of the sample from alfalfa bale silage which plastic bag were broken (BS) were significantly lower than that of sample from alfalfa bale silage which plastic bag were not broken (NBS). The chemical composition were not different from each other. The pH ranged from 4.36 to 4.72, and LA, AA, PA, BA content was 6.12%-7.04%, 2.41%-3.21%, 0.18%-0.20% and 0.67%-0.89%, respectively. AN/TN was 5.33%-5.79%. pH and AA from BS silage were higher than those from NBS silage. Mold and yeast counts of all sample were lower than 104cfu/FM. The mark of V-Score evaluation was average and the mark of Kaiser evaluation was three. 【Conclusion】 Rectangular bale silage is an good alfalfa silage pattern, and has a good fermentation quality. After removing the visible mold silage, the silage from bale which plastic bags were broken could be used as the silage with same quality of silage from bale which plastic bag were not broken.

Key words: rectangular bale silage, alfalfa, fermentation quality, V-Score evaluation, Kaiser evaluation

SUN JuanJuan, WANG GuoLiang, A LaMuSi, ZHAO JinMei, BAI ChunSheng. Evaluation of the Quality of Rectangular Bale Alfalfa Silage[J].Scientia Agricultura Sinica, 2018, 51(13): 2592-2599.

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