不同生育期芦竹的营养价值及体外产气特征

发布时间：2018-01-25 16:40

本文关键词： 芦竹不同生育期营养价值体外产气法　出处：《动物营养学报》2017年09期 　论文类型：期刊论文

【摘要】：本试验旨在探究不同生育期芦竹的营养价值及体外产气特征。采用常规分析法测定生育期分别为75、90、105、120、135d的整株芦竹、芦竹茎、芦竹叶的营养成分含量;用体外产气法测定芦竹体外发酵72h的发酵液pH、干物质消失率(DMD)、中性洗涤纤维消失率(NDFD)和酸性洗涤纤维消失率(ADFD)以及产气量(GP)和产气动态参数。结果表明:1)随着生育期的推移,整株芦竹的粗蛋白质含量逐渐降低,中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)及酸性洗涤木质素(ADL)含量呈升-降-升的波浪状变动,但总体呈上升趋势;茎、叶中的营养成分含量波动较大。2)随生育期的推移,DMD、NDFD和ADFD逐渐降低,75d与90d差异不显著(P0.05),这2者显著或极显著高于105、120d(P0.05或P0.01)。3)随着生育期的推移,最大GP呈现递减趋势,其中75d与90d无显著差异(P0.05),二者均显著或极显著低于其他生育期(P0.05或P0.01),其中105、120和135d的最大GP分别比90d低了40.22%、50.98%和51.53%;产气速度呈现相似的变化趋势。综合得出,芦竹做为牧草的最佳生育期为90d。
[Abstract]:The aim of this experiment was to investigate the nutritive value and in vitro gas production characteristics of asparagus in different growth stages. The results of routine analysis were used to determine the whole asparagus and stem of asparagus with a growth period of 75 ~ 90 ~ 105 ~ 120 ~ 135d respectively. The content of nutrient components in the leaves of bamboo; In vitro gas production method was used to determine the pH of fermentation broth and the dry matter disappearance rate (DMDs) of the fermentation broth for 72 hours in vitro. The disappearance rate of neutral detergent fibers (NDFDs) and acid detergent fibers (ADFDs), gas production (GPPs) and gas production dynamic parameters were determined. The results showed that the disappearance rate of neutral detergent fibers (NDFDs) and acid detergent fibers (ADFDs) were increased with the growth period. The crude protein content of the whole bamboo decreased gradually, and the contents of neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) showed a wavy change. But the overall trend is upward; The content of nutrient components in stem and leaf fluctuated greatly. 2) with the development of growth period, NDFD and ADFD decreased gradually, and there was no significant difference between 75 days and 90 days (P 0.05). These two cases were significantly or extremely higher than 105g / 120 d P 0.05 or P 0.01g 路3) with the development of the growth period, the maximum GP showed a decreasing trend. There was no significant difference between 75 days and 90 days, both of them were significantly lower than those of other growth stages (P0.05 or P0.01). The maximum GP of 120 days and 135 days was 40.220.98% and 51.53% lower than that of 90 days, respectively. The gas production rate showed a similar trend, and it was concluded that the optimum growth period of asparagus as forage was 90 days.
【作者单位】：湖南农业大学动物科技学院;湖南农业大学农学院;
【分类号】：S816
【正文快照】： 近年来,伴随着经济的不断发展,畜牧业在国民经济中的地位也变得越来越重要,加上我国畜牧养殖基数巨大,据统计我国每年需干草总量约1 000万t,但生产能力只有200万t,因此我国每年需要从国际市场进口的干草至少达500万t,其中仅从日本、韩国每年进口量就达20万t以上[1]。由此可见,

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