草业学报2018，Vol.27Issue(5)：190-200,11.DOI:10.11686/cyxb2017262
苜蓿干草捆安全贮藏条件的研究
Effect of moisture, bale density and CaO on storage life and quality of alfalfa hay
摘要
Abstract
The effect of bale density (50 kg · m-3,100 kg · m-3,150 kg · m-3,200 kg · m-3),moisture content (14％-16％,19％-21％,24％-26％,29％-31％) and addition of CaO (0％,1％,2％,3％) to alfalfa hay bales were assessed to help identify the optimum conditions for storage of alfalfa hay bales.Nutrient content,feed value and in vitro digestibility of alfalfa bales stored for 360 days were analyzed using an orthogonal experimental design with three factors to determine optimum storage conditions.Experiment 1:The nutritional composition and feeding value,through different experimental treatments of the effect on alfalfa hay nutrition was initially assessed;treatments A10 (density 100 kg · m-3,moisture content 24％-26％ and fungicide 3％),A12(density 200 kg · m-3,moisture content 24％-26％ and fungicide 1％),A14(density 100 kg · m-3,moisture content 29％-31％ and fungicide 2％) and A15 (density 150 kg · m-3,moisture content 29％-31％ and fungicide 1％) resulted in relatively small dry matter (DM) losses with high feed value after 360 days.Experiment 2:The four best treatments were screened with A1 (density 50 kg · m-3,moisture content 14％-16％ and fungicide 0) and A16(density 150 kg · m-3,moisture content 29％-31％ and fungicide 0) were used as controls.In vitro digestion was also assessed.The results showed that treatment A14 had the highest gas production rate of 53.13 mL,significantly higher than the control treatments (P＜0.05).The pH of A14 bales was lower than other treatments at all times,with a mean pH of 6.64.The highest TVFA content of 61.05 mol · L-1 occurred in A14,significantly higher than other treatments (P＜0.01).Degradation losses for crude protein and DM were 81.21％ and 66.84％ respectively,significantly higher than other treatments (P＜0.01).Consideration of nutritional composition,feeding value and in vitro digestibility revealed that alfalfa hay with relatively high moisture (29％-31％),medium density (100 kg · m-3) with 2％ CaO added was superior to other treatment combinations.关键词
苜蓿草捆/防霉剂/饲用价值/体外消化Key words
alfalfa bale/fungicide/feeding value/in vitro digestion引用本文复制引用
成启明,格根图,尹强,刘丽英,范文强,降晓伟,卢强,包健,贾玉山..苜蓿干草捆安全贮藏条件的研究[J].草业学报,2018,27(5):190-200,11.基金项目
国家自然基金面上项目(31572461)和地区科学基金项目(31360585)资助. （31572461）
