| Titles |
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English :
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Utilization of agricultural by-products in
ruminants feeding
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Arabic :
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الاستفادة من المخلفات الزراعية في تغذية الحيوانات المجترة
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| Abstract |
The results obtained from the laboratory trials on the seven
chosen cultivars (Giza 2, Pioneer, HS 9, HS 103, HT 310, HT 320 and
D 215) proved pronounced variability in the contents of some components CP (3.5-5.4%), CF (30.2-33.1 %), EE (0.7-1.0%), Ash ( 8.3 - 13.2%) and NFE (51.9-54.3%).
- The findings of laboratory trial indicate that it may be possible to select for plants of higher (straw and stover) feeding value from studies of chemical composition and in vitro, although it is desirable for the final appraisal to feed selected materials to animals.
Concerning the chemical anlysis and in vitro digestibility trials of plant fraction it was found that the nature of the CF fractionation ((NDF) in
sheath and blade and its differences from the fractionation in stems has
not been defined and the reasons for the differences in apparent digestibility are not known,
Other aspects of digestion are important in our understanding of differences in plant fractions and plant tissues.
The variety of stover affected the OM, CP, NDF and cellulose contents, and IVDMD,
Generally, it could be concluded from the results obtined from the present study that the ration containing corn stover (HD 215 ) showed higher efficiency in intake of DM, TDN and DCP and in the form of body gain, when compared to the ration included variety Giza2.
In addition, the high digestibility might be due to, beside the above mentioned reasons the lower lignin content in cell walls which might lead to a better in vitro digestion of DMD and indicated that selection for cell wall characteristics may lead to improved feeding value through increased digestion rates.
On the other hand, a lower NDF content might be expected to result in an increase in forage consumption. Concerning the variability in chemical composition and in vitro digestibility of the stover, ruminant nutritionists use various chemical descriptions of forages as indices of their feeding value. For mature, senescent and dead plant material it is valuable, in the first instance, to measure the proportions of cell contents and cell wall constituents by the detergent analysis procedures of Goering and Van Soest (1970). This is because the cell contents represent the readily digestible nutrients, while the cell walls are more resistant to fermentation.
The nitrogen content of feeds is also important as it is indicative of whether or not this nutrient is limiting for microbial digestion. While more sophisticated and greater numbers of analyses can yield in formation on the amounts of particular compounds present, such is generally only useful in basic research or in other specifically defined situations.
Ammonia treatment resulted in notiecable Increase of CP and decrease the CF content in the treated material and enhancement of the digestibility and the nutritive value of the treated corn stover. Feeding ammoniated corn stover (TCS) as a single feed stuff resulted in higher nutritive value and prove positive N balance compared to feeding untreated corn stover (CS).
Generally, it could be concluded that formulating a ration containing TCS showed good results in the form of better weight gain and feed conversion rate (DM, TDN and DCP) per unit gain when compared to the untreated stover.
Finally, it appears from this study that the significantly higher nutritive
value of DH215 compared to those of Giza 2 based on IVOMD and the better feed efficiency, points to a fact that future screening and selection process should seriously consider straw quality as a valuable parameter. More digestible straws would be beneficial for feeding in corn stover samples collected for analysis, the crude protein content is below that required to maintain ruminants. Nitrogen supplementation would be needed to ensure reasonable levels intake and, digestion.
Greater apparent DM and OM digestibility in the rumen indicates that ammonia treatment increases energy availability to ruminants.
According to the previous results, it could be concluded that feeding TCS ad lib with 7% CP along with 5kg concentrate mixture (15% CP) per head daily during the fattening period of 250 kg buffalo calves up to 400 kg LBW will result in saving LE 0.5 of the feeding cost needed for 1 kg gain compare to feeding CS ad lib provided that the com stover used are from the same variety.
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| Publication year |
1996
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| Pages |
120p.
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| Availability location |
معهد بحوث الانتاج الحيوانى - شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
541
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| Organization Name |
Animal Production Research Institute (APRI)
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| Country |
Egypt
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| Department |
Agricultural By-products Utilization Research Department
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Ammonia.
Byproducts.
Calves.
Digesta.
In vitro.
In vivo experimentation.
Maize.
Ruminants.
Water buffaloes.
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| Publication Type |
PhD Thesis
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