Studies on the Improvement of Feeding Value of Structural Carbohydrate in Wood by Explosion Treatment

爆炸处理提高木材中结构碳水化合物饲用价值的研究

基本信息

批准号：
61560303
负责人：
MIYAZAKI Akira
金额：
$ 0.9万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1986
资助国家：
日本
起止时间：
1986 至 1988
项目状态：
已结题

项目摘要

Wood contains a large amount of structural carbohydrate which can potentially be digested by ruminants. However, strong bond between cellulose and lignin usually prohibits its utilization as feed. That is, lignification in wood is a main factor in lowering digestibility of it. Explosion is known to be one of the effective way for delignification, since the lignin and carbohydrate bond can easily cleaved by this treatment. In addition, phenolic monomers are sometimes produced from lignin during explosion process. This material is not found in usual feed. Therefore, the effect of this material on digestibility and rumen fermentation has to be investigated prior to the practical use of exploded wood for animals. In this experimant, effect of explosion treatmtnt on nutritive value and possible usage of exploded wood as feed are investigated. The cell wall component was subject to umpact by the explosion, with decrease of hemicellulose content and increase of soluble lignin. The other compositions varied very little. Acetic acid, furfural and monosaccharides were detected in water extract of exploded samples. The explosion treatment had remarkable impact on poplar and white birch. Exploded poplar and white birch gave 42 and 36 percent in vivo digestibilities after the treatment. Addition of meoh extract resulted decrease of starch and cellulose digestion in the in vitro experiment. MeOH addition to casein did not have a clear effect on ammonia production. Major component of MeOH extract was degraded lignin, 1700-1900 of molecular weight. Degraded lignin by the treatment might inhibit specific activity of rumen microorganisms. However, since in vivo experiment showed that VFA production was not influenced by feeding exploded wood in sheep, exploded wood can practically be utilized as one of the feed ingredients for ruminants.

木材含有大量的结构性碳水化合物，可能会被反刍动物消化。但是，纤维素和木质素之间的牢固键通常禁止其用作饲料。也就是说，木材中的木质化是降低其消化率的主要因素。已知爆炸是拆卸的有效方法之一，因为木质素和碳水化合物键很容易被这种处理而裂解。另外，在爆炸过程中，有时是由木质素产生的酚类单体。在通常的饲料中找不到这种材料。因此，必须研究该材料对消化率和瘤胃发酵的影响，然后实际使用爆炸的木材作为动物。在此实验中，研究了爆炸治疗对营养价值的影响，并研究了爆炸木材作为饲料的可能使用。细胞壁成分因爆炸而受到UMPACT的影响，而半纤维素含量的降低和可溶性木质素的增加。其他构图的变化很小。在爆炸样品的水提取物中检测到乙酸，呋喃和单糖。爆炸治疗对杨树和白桦树产生了显着影响。治疗后，爆炸的杨树和白桦树给出了42％和36％的体内消化。在体外实验中，添加MeOH提取物导致淀粉和纤维素消化减少。酪蛋白添加的MeOH对氨产生没有明显影响。 MeOH提取物的主要成分被降解的木质素，分子量为1700-1900。通过治疗降解的木质素可能会抑制瘤胃微生物的特定活性。但是，由于体内实验表明，VFA的产生不受饲养木材中爆炸的木材的影响，因此爆炸的木材实际上可以用作反刍动物的饲料成分之一。