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首頁> 外文學(xué)位 >ENZYMATIC IMPROVEMENT OF BARLEY FOR CHICKS AND THE USE OF HIGH-FIBER FEEDS FOR LAYING HENS.
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ENZYMATIC IMPROVEMENT OF BARLEY FOR CHICKS AND THE USE OF HIGH-FIBER FEEDS FOR LAYING HENS.

機(jī)譯：小雞大麥的酶促改良以及蛋雞產(chǎn)蛋的高纖維飼料的使用。

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摘要

Barley and soybean meal were used as protein and energy sources in a study of the effects of barley beta-glucan on chicks. The accumulation of fecal material on wire cage floors indicated the presence of beta-glucan in the diet. The adhesive nature of the fecal material was probably a result of the high intrinsic viscosity of the beta-glucan of barley. Larker (variety) and Steptoe (variety) barleys were steeped in water in ground or whole grain form. Chick growth was most improved by grinding prior to steeping. Larker barley produced the best growth in chick experiments.; Water-soluble polysaccharides such as guar gum and hydroxyethyl cellulose reduced gain and feed efficiency of chicks. Adhesion of fecal material to cage screens was observed. Wood cellulose and cotton cellulose produced small changes in growth and feed efficiency.; Crude cellulase from Trichoderma reesei (formerly T. viride) improved growth and reduced intestinal fluid viscosity of chicks fed barley, rye, wheat and oats. T. reesei cellulase reduced intestinal fluid viscosity of chicks fed barley beta-glucan at 2% of the diet. Beta-glucan was isolated from the intestinal fluid of chicks fed a barley diet. The number average molecular weight of this material was 48,000 daltons and the majority of the isolated beta-glucan was excluded by a polyacrylamide gel which had an exclusion limit of 60,000 daltons. The cellulase added to barley feed increased the % tibia ash of chicks.; Brewers dried grains were used as a protein supplement for laying hens. Lysine improved egg size and egg production. Egg albumen quality from birds fed brewers grains was similar to the control diet. Corn distillers grains, wheat middlings and a combination of wheat middlings and bran were used in laying hen diets. Wheat middlings was the best protein supplement of the ingredients tested. Changes in egg production suggest methionine as the second-limiting amino acid in a diet containing wheat middlings.
機(jī)譯：大麥和豆粕被用作蛋白質(zhì)和能源，用于研究大麥β-葡聚糖對(duì)雛雞的影響。糞便物質(zhì)在鐵籠地板上的積累表明飲食中存在β-葡聚糖。糞便材料的粘附性可能是大麥β-葡聚糖的高固有粘度的結(jié)果。將Larker（品種）和Steptoe（品種）大麥浸入水中，制成地面或全谷物形式。通過在浸泡之前進(jìn)行研磨，可以最大程度地改善小雞的生長。 Larker大麥在雛雞實(shí)驗(yàn)中生長最好。瓜耳膠和羥乙基纖維素等水溶性多糖會(huì)降低雛雞的增重和飼料效率。觀察到糞便物質(zhì)粘附到籠式篩子上。木質(zhì)纖維素和棉纖維素的生長和飼料效率變化很小。來自里氏木霉的粗纖維素酶（以前稱為里氏木霉）改善了飼喂大麥，黑麥，小麥和燕麥的雛雞的生長并降低了其腸液粘度。里氏木霉纖維素酶降低了飼喂大麥β-葡聚糖2％日糧的雛雞的腸液粘度。從大麥飲食的雛雞的腸液中分離出β-葡聚糖。該物質(zhì)的數(shù)均分子量為48,000道爾頓，并且大多數(shù)分離出的β-葡聚糖被排除極限為60,000道爾頓的聚丙烯酰胺凝膠所排除。添加到大麥飼料中的纖維素酶增加了雛雞的脛骨灰分。釀酒商干燥的谷物被用作蛋雞的蛋白質(zhì)補(bǔ)充。賴氨酸改善了蛋的大小和產(chǎn)蛋量。飼喂啤酒谷物的鳥類的蛋清蛋白質(zhì)量與對(duì)照飲食相似。玉米酒糟，小麥中and以及小麥中and和麩皮的組合被用于蛋雞日糧。小麥中粉是測(cè)試成分中最好的蛋白質(zhì)補(bǔ)充劑。產(chǎn)蛋量的變化表明蛋氨酸是含小麥中糧的第二限制氨基酸。

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  • 作者

    WHITE, WAYNE BERNARD.;

  • 作者單位

    The University of Wisconsin - Madison.;

  • 授予單位 The University of Wisconsin - Madison.;
  • 學(xué)科 Agriculture Animal Culture and Nutrition.
  • 學(xué)位 Ph.D.
  • 年度 1982
  • 頁碼 149 p.
  • 總頁數(shù) 149
  • 原文格式 PDF
  • 正文語種 eng
  • 中圖分類 飼料;
  • 關(guān)鍵詞

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