Nutritive evaluation of some browse tree legume foliages native to semi-arid areas in western Tanzania
Nutritive evaluation of some browse tree legume foliages native to semi-arid areas in western Tanzania
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坦桑尼亚西部半干旱地区一些豆科植物叶子的营养评价
DOI：
10.5713/ajas.2003.1429
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Fujihara
中科院分区：
文献类型：
--
作者：
C. Rubanza;M. Shem;R. Otsyina;T. Ichinohe;T. Fujihara
以金合欢属（Acacia sp . nilotica， A. tortilis， A. polyacantha）， Dichrostachys sp . Flagea villosa， pilio柱头thonningii， Harrisonia sp .)为研究材料，比较了金合欢属（gliriicidia sepium）和金合欢属（Acacia sp .）叶片的营养潜力（化学成分和降解特性）。采用聚乙二醇单宁生物测定法评价单宁抗营养活性对消化率的影响。粗蛋白质（CP）、灰分、中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）和酸性洗涤木质素（ADL）含量差异显著。thonningi > F。摘要> Dichrostachys sp >。tortilis >。polyacantha。添加PEG对体外OM消化率（IVD）有显著提高（p<0.05）。IVD的增加主要是由于PEG对单宁的结合作用；代表了潜在的营养价值，以前被单宁抗营养活性所抑制。浏览饲料具有作为瘤胃氮源的潜力，特别是对于食用低品质粗饲料的反刍动物，由于其蛋白质含量高，纤维成分低，消化率高。然而，反刍动物对浏览补充剂的利用受到高酚和单宁含量的阻碍。单宁抗营养活性的失活，可能是通过与其他容易获得的氮源一起饲喂单宁浏览来稀释单宁抗营养活性，从而提高浏览饲料的利用率。反刍动物浏览饲料的适口性、采食量及其对生长性能的影响有待进一步研究。(Asian-Aust。j .似的。科学》2003。卷16，第10号：1429-1437)
Browse tree legume leaves from Acacia spp (A. nilotica, A. tortilis, A. polyacantha), Dichrostachys sp, Flagea villosa, Piliostigma thonningii, Harrisonia sp were evaluated for nutritive potential (chemical compositions and degradability characteristics) compared to Gliricidia sepium. Effect of tannins anti-nutritive activity on digestibility was also assessed by polyethylene glycol (PEG) tannin bioassay. Crude protein (CP), ash, neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) differed (p A. nilotica>P. thonningi>F. villosa>Dichrostachys sp>A. tortilis>A. polyacantha. Addition of PEG resulted to (p<0.05) improvement in in vitro OM digestibility (IVD). Increase in IVD was mainly due to binding action of PEG on tannins; and represents potential nutritive values previously depressed by tannins anti-nutritive activity. Browse fodder has potential as sources of ruminal nitrogen especially for ruminants consuming low quality roughages due to high protein, lower fiber compositions and high potential digestibility. However, utilization of browse supplements in ruminants is hampered by high phenolic and tannin contents. Deactivation of tannin anti-nutritive activity, possibly by feeding tanniniferous browse with other readily available nitrogen sources to dilute tannin anti-nutritive activity could improve utilization of browse fodder supplements. Further studies are needed to assess browse fodder palatability and intake, and their effect on growth performance in ruminants. (Asian-Aust. J. Anim. Sci. 2003. Vol 16, No. 10 : 1429-1437)