Availability of Energy to Sheep from Artificially Dried Grass at Progressive Growth Stages

Joshi, D. C.

doi:10.1080/00015127309433490

Cited by 4 publications

(1 citation statement)

References 7 publications

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“…1972;Graham 1964aGraham , b, 1967Joshi 1973) and agrees with the factor of 82% adopted by the N.R.C. (1969).…”

Section: Discussionsupporting

confidence: 69%

Nutritive value of white clover and perennial ryegrass

Rattray¹,

Joyce²

1974

New Zealand Journal of Agricultural Research

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Thirty Romney wether hoggets were individually fed for 94 days at maintenance or ad lib. levels of nutrition on pure or 50 : 50 mixed diets of white clover and perennial ryegrass. Comparative slaughter and balance techniques were used to study the utilisation of dietary energy.The white clover contained higher levels of crude protein than the ryegrass, but lower levels of soluble and structural carbohydrates.Animals fed white clover grew faster than those fed ryegrass, but the growth rates of those on the mixed diet were not significantly different from the average of those on the two pure diets.The average a!)parent digestibility of the gross energy of all rations was 75%. Of the digestible energy (DE) 82% and 84% was metabolised by the maintenance and ad lib. animals, respectively. There were no significant differences between diets either in percentage digestibility or percentage metabolisability, but the metabolisable energy (ME) content of the dry matter (DM) consun;ed at the maintenance level (11.1 kJ/g) was significantly lower than for ad lib. feeding (11.4 kJ /g).Estimated fasting heat production and maintenance requirements averaged 319 and 511 kJ /kg W o . 7fi , respectively, where W is the ingesta-free body weight.For the white clover, mixed, and ryegrass diets efficiencies of utilisation of ME for maintenance were 67, 63, and 62%, and for gain 51, 40, and 33% respectively; net energy contents of the diets for maintem:nce (NEm) were 7.6, 6.7, and 6.7 kJ/g DM and for gain (NE") were 5.9,4.8, and 4.0 kJ /g DM. respectively. 401

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“…1972;Graham 1964aGraham , b, 1967Joshi 1973) and agrees with the factor of 82% adopted by the N.R.C. (1969).…”

Section: Discussionsupporting

confidence: 69%