The Direct Evaluation of Pasture in Terms of the Milk Production of Individually Grazed Cows

Cox, Christopher; Foot, A. S.; Hosking, Zena D.; Rowland, S. J.

doi:10.1111/j.1365-2494.1956.tb00058.x

Cited by 24 publications

(14 citation statements)

References 4 publications

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“…The estimates of feed intake were not sufficiently precise to enable this to be determined and indeed the validity of applying the equation of Raymond <fc Minson (1955) might be questioned, but the figures obtained both by the clipping method in 1956 and by the marker method in 1957 were in close agreement with estimates made by Waite, Holmes, Fergusson & MacLusky (1952) and by Brundage, Sweetman & Bula (1956). The determined feed intakes also agree closely with estimates based on the production data and the equation derived by Cox, Foot, Hosking, Line & Rowland (1956) which depends on the milk yield, live weight and rate of live-weight gain of the cow.…”

Section: Feed Consumptionsupporting

confidence: 76%

Studies in grazing management. VII. The influence of strip grazing versus controlled free grazing on milk yield, milk composition, and pasture utilization

Arnold

Holmes

1958

J. Agric. Sci.

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1. Experiments were carried out in 1956 and 1957 in which milking cows were grazed at the same stocking rate, either on strip grazing or on free grazing. The cows followed balanced Latin Square designs.2. The pastures were liberally fertilized, either with NPK fertilizer (202 lb. N, 202 lb. P2O5, 252 lb. K2O per acre in 1956 and 80% of these quantities in 1957), or with PK fertilizers (269 lb. P2O5 and 269 lb. K2O in 1956 and 80% of these quantities in 1957), and a subsidiary comparison of the effect of nitrogenous fertilizers was made in 1956.3. At the end of the main experiment in 1956 a study of the effect of straw offered to the grazing cows was made. No supplement other than straw was offered.4. The results in both years showed no difference in milk yield per cow due to treatments, nor in 1956 was milk yield or milk composition affected by grazing treatment, fertilizer treatment or the provision of straw.5. In both years the live-weight gain per cow was less with free grazing. In 1956 the provision of straw increased the rate of live-weight gain. It is suggested that these differences are mainly due to gut fill.

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Section: Feed Consumptionsupporting

confidence: 76%

Studies in grazing management. VII. The influence of strip grazing versus controlled free grazing on milk yield, milk composition, and pasture utilization

Arnold

Holmes

1958

J. Agric. Sci.

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“…higher intake for milking cows, an assumption confirmed by several workers (Wallace, 1956;Cox et al, 1956)). The results in Table 4 show a much closer agreement with the cow equivalents of Clark and Bessel and stress the high feed consumption of young growing cattle.…”

Section: Discussionmentioning

confidence: 58%

The feed intake of grazing cattle. II. The influence of size of animal on feed intake

1961

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1. Two experiments each with 3 dry cows, 3 heifers and 3 calves were carried out in 1959 and 1960 under uniform continuous grazing conditions on a ryegrass-white clover sward to measure individual feed intake by the chromic oxide-faecal nitrogen method.2. Estimates of digestibility were high (70–82% in organic matter) and there was evidence that calves selected a diet of higher digestibility than cows.3. Mean daily estimates of organic matter intake were for cows (1300 lb. live-weight) 23·5 lb., for heifers (790 lb. live-weight) 20·8 lb. and for calves (450 lb. live-weight) 14·3 lb. Corresponding digestible organic matter intakes were 17·4, 15·3 and 11·0 lb.4. Relationships between digestible organic matter intake and liveweight were calculated and the merits of the exponents 0·62 and 0·73 of liveweight discussed.5. The results were compared with accepted cow equivalent standards and, regardless of the exponent chosen, agreed with the system which adopts higher values for young grazing cattle.

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“…The variance of intake calculated by the herbage cutting technique method is straight forward (Cox et al, 1956). The variance of intake calculated by the herbage cutting technique method is straight forward (Cox et al, 1956).…”

Section: Discussionmentioning

confidence: 99%

Estimation of herbage consumption by grazing cattle using measurements of eating behaviour

Chacon

Stobbs

Sandland

1976

Grass and Forage Science

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numbers of animals required to detect true differences in intake at various levels of precision are presented.It is concluded that herbage consumption by grazing ariimals can be obtained from measurements of eating behaviour. AbstractFeed consumption (/). of a group of eight nonlactating Jersey cows strip-grazing oats at three stages of growth was estimated from number of eating bites (AQ and bite size (5) measurements using the expression, I = NxS. N was measured with four non-fistulated animals while S was determined independently with four oesophageal fistulated animals. These estimates were compared with herhage consumption estimates using a cutting technique (fourteen samples of both herbage offered and refused).Eating behaviour estimates of intake based on N and S were 29% higher than cutting estimates due to fistulated animals having a high number of mastication bites with the head up during sampling and a large diurnal variation in bite size. After allowing for these sources of error eating behaviour estimates were only 2% higher than cutting estimates.Sampling variability was similar for both cutting and eating behaviour techniques; on an individual plot basis the percentage coeflBcients of variation were 11-2 and 101 for cutting and eating behaviour techniques, respectively. Methods of reducing ' sample variability are discussed and tables of

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The Direct Evaluation of Pasture in Terms of the Milk Production of Individually Grazed Cows

Cited by 24 publications

References 4 publications

Studies in grazing management. VII. The influence of strip grazing versus controlled free grazing on milk yield, milk composition, and pasture utilization

Studies in grazing management. VII. The influence of strip grazing versus controlled free grazing on milk yield, milk composition, and pasture utilization

The feed intake of grazing cattle. II. The influence of size of animal on feed intake

Estimation of herbage consumption by grazing cattle using measurements of eating behaviour

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