The nutritive value of Rhodes grass (Chloris gayana) when treated with CaO, NaOH or a microbial inoculant and offered to dairy heifers as big-bale silage

Chaudhry, A. S., Cowan, R. T., Granzin, B. C., Klieve, A. V. and Lawrence, T. L. J. (2001) The nutritive value of Rhodes grass (Chloris gayana) when treated with CaO, NaOH or a microbial inoculant and offered to dairy heifers as big-bale silage. Animal Science, 73 2: 329-340.


Author Chaudhry, A. S.
Cowan, R. T.
Granzin, B. C.
Klieve, A. V.
Lawrence, T. L. J.
Title The nutritive value of Rhodes grass (Chloris gayana) when treated with CaO, NaOH or a microbial inoculant and offered to dairy heifers as big-bale silage
Journal name Animal Science   Check publisher's open access policy
ISSN 1357-7298
Publication date 2001-10
Sub-type Article (original research)
Volume 73
Issue 2
Start page 329
End page 340
Total pages 12
Place of publication London, U. K.
Publisher CABI Publishing
Collection year 2001
Language eng
Subject C1
300403 Animal Nutrition
630104 Dairy cattle
Abstract A series of laboratory and animal studies examined the use of chemical and biological agents to enhance the digestibility of Rhodes grass (grass) cut at 60 (young) and 100 (mature) days of regrowth and ensiled as big round bales. The treatments included an untreated control (C), a microbial inoculant (I), NaOH, CaO and NaOH plus inoculant (NaOH + I). Inoculant was grown anaerobically, using a starter culture of rumen fluid from cattle given Rhodes grass. Treatments C, 1, NaOH, NaOH + I, were offered separately to twelve dairy heifers, in a 3 X 4 randomized complete block design, repeated twice for each grass silage. C and I had substantial mould growth, compared with no visible mould in NaOH or NaOH + 1. CaO treatment was effective in preventing mould growth, but had little effect on the chemical composition and in sacco digestibility of mature grass silage. NaOH reduced NDF content and increased in sacco digestibility (P < 0.05) but not the in vivo digestibility (P > 0.05) of both mature- and young-grass silage. The effects of other treatments on nutritive value were non-significant at both stages of maturity. NaOH increased the intake of mature-grass silage by 24-26% (P < 0.05), but had little effect on the intake of young-grass silage (P > 0.05). Treatment I consistently reduced grass silage intake (P < 005) for young-grass silage. The findings of these studies show that treating mature Rhodes grass with NaOH will improve its nutritive value and reduce mould growth in conserved herbage. However none of the treatments in this study had any consistently positive effects on the in vivo nutritive value or storage quality of young-grass silage.
Keyword Agriculture, Dairy & Animal Science
Alkalis
Chloris Gayana
Heifers
Inoculation
Silage
Alkaline Hydrogen-peroxide
Sodium-hydroxide
Feedbase 2001
Wheat-straw
Feeding Systems
Stem Fractions
Calcium-oxide
Cell-walls
In-vitro
Cattle
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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