Characterization of guar meal for use in poultry rations /
Three specific guar meals obtained during the production of guar gum were evaluated for use in poultry feeds. Initial experiments determined the proximate composition and poultry metabolizable energy levels of the guar meals in chickens. Protein content was determined to be 45, 36, and 38% for the...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2002.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=764789601&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | Three specific guar meals obtained during the production of guar gum were evaluated for use in poultry feeds. Initial experiments determined the proximate composition and poultry metabolizable energy levels of the guar meals in chickens. Protein content was determined to be 45, 36, and 38% for the 14 mesh (germ), the 18 mesh (hull), and the combined fractions respectively. Results of the proximate analysis and metabolizable energy assays suggest the guar meals were nutritionally suitable for inclusion in poultry diets. Experiments were then conducted to qualitatively and quantitatively define trypsin inhibitor activity in each of the three guar meals. The trypsin inhibitor activity of all three guar meals was approximately half (3423 TUI/g) the activity in commercial dehulled soybean meal (6840 TUI/g). Feed trials were conducted utilizing industry type corn-soy broiler diets containing 2.5%, 5%, 7.5%, and 10% of each guar meal. Results indicated that the 2.5% level of inclusion of all three guar meals yielded growth responses similar to those produced by the soybean meal control diet. The 14 mesh guar meal produced significantly higher weight gains with better feed conversion than the other guar meals. In a second feed trial the corn-soy diets were formulated to include 5% of each of the three guar meals. Beta-mannanase (Hemicell®) was included at the recommended level (109,000 units/kg mixed feed) in half of the replications of each guar meal treatment and the soybean meal control. Broilers receiving 14 mesh guar meal did not differ from control birds with respect to six-week body weight and cumulative feed consumption. However, cumulative feed conversion ratios were slightly higher. Beta-mannanase significantly improved feed conversion across all treatments without affecting weight gain. In conclusion it appears all three guar meals can be safely fed to broiler chickens at 2.5% of the diet and the 14 mesh guar meal may be utilized at slightly higher concentrations in the diet. |
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| Item Description: | Vita. "Major Subject: Poultry Science". |
| Physical Description: | x, 151 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 83-87). |