The Study on the Effects of Chinese Herbal Mixtures on Growth, Activity of Post-Ruminal Digestive Enzymes and Serum Antioxidant Status of Beef Cattle

Sixteen Limousin×Luxi crossbred beef cattle [099.4±8.67) kg] were used to evaluate the effects of Chinese herbal mixtures (CHM) on growth, activities of post-ruminal digestive enzymes and serum antioxidant status of beef cattle. Treatments were control (no CHM supplementation) and three formulations of CHM (CHM-A, CHM-B and CHM-C) that were arranged as completely randomized design. The calves were fed in indoor individual feeding barn with total mixed ration for 90 d.The CHM-A, CHM-B, and CHM-C was incorporated into the diet at the level of 20 g kg-1 DM (dry matter) of concentrate.The cattle were weighted at the beginning, at the end and every 15 d between to determine growth rate. Blood sample was taken every 30 d to analyze activities of total superoxide dismutase (T-SOD) and glutathione peroxidase (GSH-PX) and concentration of malondialdehyde (MDA). The cattle were slaughtered at the end of experiment and chymus samples from various section of the post-ruminal digestive tract were collected to analyze enzymes activities. All cattle had similar average daily gain, but cattle supplemented with CHM-A tended faster growth (P=0.08) compared to the control and other CHM treatments. Supplementation of CHM did not affect Ph of chymus in any section of the post-ruminal digestive tract.Activities of pepsin, trypsin, chymotrypsin, and lipase in chymus samples were enhanced (P<0.05) to various extents by supplementation of CHM-A, CHM-B, and CHM-C depending on the enzymes and the site of the digestive tract. Amylase activity was increased only by CHM-A and CHM-C from chymus sample collected at the ileum. Supplementation of CHM-A and CHM-B reduced (P<0.05) concentration of MDA, but did not affect GSH-PX activity in the serum of cattle throughout the entire experimental period. Cattle supplemented with CHM-B also had higher (P<0.05) T-SOD activity in the serum at day 30 and 60 as compared with the control and the other two CHM treatments. Chinese herbal mixtures supplemented at the levels of 20 g kg-1 DM of concentrate increased post-ruminal digestive enzymes activity and enhanced serum antioxidant status. Inclusion of CHM-A and CHM-B in the diet may be favourable for ruminant production.     

粪便堆沤处理生产有机肥

一、主要技术参数（1）碳氮比：堆肥混合物的碳氮平衡是使微生物达到最佳生物活性的关键因素．堆肥混合物的碳氮比应保持在25-35：1。（2）湿度：好氧堆肥一般应保持在40％～70％。（3）酸碱度：酸碱度随堆肥混合物种类以及堆肥工艺阶段的不同而变化．一般情况下不需调节，     

健康长寿话王浆

蜂王浆是青年工蜂舌腺（咽下腺）和上颚腺共同分泌的混合物．其颜色呈乳白色或浅黄色，具有酸、涩、辛辣、微甜味道．简称王浆．又称蜂乳、蜂皇浆。蜂王浆的营养价值很高，蜂王和工蜂同为雌性蜂．但蜂王一生食用蜂王浆寿命可长达3—4年．甚至达到10年；而工蜂仅小幼虫期服用蜂王浆．以后改食用蜂蜜和蜂粮．寿命仅为1—2个月。经国内外多年科研和医学临床实践证明，蜂王浆作为珍稀名贵的天然营养品、滋补品．对人类具有神奇的医疗、保健作用。     

生物纳米电子平台

美国科学家开发出一种简单、可行的碳纳米管混合物的净化方式。其可借助紫外线和空气中的氧生成净化的半导性纳米管，这对发展下一代计算机芯片具有非凡价值。     

日本京都大学研制出新的昆虫吸引剂

日本京都大学的研究者已鉴别出一些对甘蓝夜蛾天敌有吸引力的物质。当它们受到甘蓝夜蛾幼虫攻击时，被研究的4种挥发性化合物就会从蔬菜叶子上释放出来。它们中的每一种都能吸引拟寄生黄蜂，温室试验表明，这4种化合物的混合物更有效。将它们的混合物应用于蔬菜上就能成功地降低蛾子虫口。这些化合物均已申请专利，它们的混合物拟作为生物农药寻求登记。[第一段]     

如何准确控制制粒用混合物水份

物料中的水份含量在饲料加工中是很重要的,而且已被证实是可以控制的。一种新的方法,是在混合机中安装一个水份感受     

碘化酪蛋白混合物对雏火鸡的作用效果评价

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最人道的控制气体击晕法

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“废旧塑料再生利用”重在销路

《城乡致富》编辑部:我是贵刊的一名忠实读者。我看准了“废旧塑料再生利用”这个项目,虽然关注了相当一段时间,但是没有真正到厂家和市场去考察过。所以想向贵刊咨询这个项目的市场前景究竟如何,产出颗粒的价格和销路怎么样?是否适合像我这样只有几万元钱的小本投资者投资?投资过程中,应注意哪些方面的事项?谢谢!山东省新泰市染料股份有限公司卫建文     

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