Utilization ofLolium multiflorumby sheep 1. Influence of dry matter content and correlated factors on voluntary intake

Meissner, H.H.; Preez, Mariana M. du; Enslin, A.D.; Spreeth, E.B.

doi:10.1080/02566702.1992.9648293

Cited by 11 publications

(12 citation statements)

References 14 publications

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“…This results because the cell wall digestibility of ryegrass does not decrease appreciably with ageing. The values of 8l to 83% IVDOM are furthermore consistent with the 79 to 82oh reported by Meissner et al (1992).…”

Section: Resultssupporting

confidence: 80%

“…The latter difference in DM content between Exalta and Midmar is reflected in the digestion trial (Table 2) which was conducted after l5 September 1993. In both trials, however, DM content averaged above 18% as intended and as a result OM intake in both trials was close to maximum (83 to 90 g,rt<g W0 islday) as reported by Meissner et al (1992) and predicted by Meissner and Paulsmeier (1995).…”

Section: Resultsmentioning

confidence: 75%

“…For example, OM and CP digestibilities in the present trials were about 86 and 80%o, respectively (Table 4). In the trials of Meissner et al (1992), OM digestibility varied between 84 and 85.6oh and in the trial of Du OM digestibility ranged from 84.7 to 85.4Yo. In the latter investigation CP digestibility ranged between 78 and 805%.…”

Section: Resultsmentioning

confidence: 99%

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A comparison of Italian ryegrass (Lolium multiforum) cultivars Exalta and Midmar with respect to their nutritive value for sheep

Meissner¹

2009

SA J. An. Sci.

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The nutritive value of Exalta was compared with Midmar in a grazing trial with lambs and in a digestion trial with mature wethers. The study was conducted between 17 August and 8 October 1993. Fifteen lambs per cultivar grazed the pastures using a two paddock per cultivar rotation procedure. Intake was measured from IVDOM of oesophageal samples and OM excreted qs collected by faecal bag. Lambs were weighed regularly and wool production was measured from a 100 cm' patch on the right mid-rib area. In the digestion trial, fermentation endproducts and nutrient disappearance in the gut were measured through multiple cannulae using Yb-acetate and Cr-EDTA as markers. Five sheep were used per cultivar; they were fed freshly cut ryegrass at four equally spaced intervals in24h. In both trials, DM content of the herbage exceeded 18% so high moisture content should not have limited forage intake. Cell wall content was more often lower for Exalta than for Midmar, the difference being primarily due to cellulose. In contrast, TNSC contents were more often higher. Other constituents did noJliffer significantly. OM intakes did not differ significantly between cultivars, being 80.2 and 84.3 g OM/ kg\AP ''ld for Exalta in the grazing and digestion trial respectively, and 76.1 and 79.1 g OM/kg\ f '"/d for Midmar. ADG in the grazing trial did not differ significantly, 239 g/ d for Exalta and 224 g/d for Midmar, but clean wool yield was highly significantly lower for lambs grazing Exalta (21 .0 vs 34.4 g/100 cmz). None of the rumen fermentation parameters or nutrients which disappeared in the gut differed significantly, except CP where 86% of CP intake disappeared postruminally on Exalta versus only 620/o on Midmar. The higher TNSC contents of Exalta presumably enhanced microbial protein production in the rumen and thereby promoted higher protein flow to the small intestine. However, wool production results were opposite to that expected from protein supply only.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 75%

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A comparison of Italian ryegrass (Lolium multiforum) cultivars Exalta and Midmar with respect to their nutritive value for sheep

Meissner¹

2009

SA J. An. Sci.

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“…The fresh herbage had a DM content of 18%. Meissner et al (1992) concluded that at 18-20% DM, intake should no longer be influenced by the effects of high moisture. Animals were fed ad lib during the first part of the trial and ad lib -20% during the second part, because feeding level per se may affect N flow to the small intestine.…”

Section: Approachmentioning

confidence: 97%

Utilization ofLolium multiflorumby sheep 2. The effect of drying the herbage on soluble nitrogen content and partial digestion

Preez

Meissner

1992

Journal of the Grassland Society of Southern Africa

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“…The performance of lambs grazing ryegrass is often disappointing. Possible reasons for this are high moisture concentrations in plant material (Meissner et al, 1992) and extensive hydrolysis of highly soluble and degradable proteins that often result in insufficient protein reaching the small intestine (Aii & Stobbs, 1980). This is of particular concern in the case of temperate pastures of high N content and is further aggravated by N fertilization (Meissner et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Performance responses of lambs of various ages to Italian ryegrass (Lolium multiflorum) fertilized with various levels of nitrogen

Villiers¹,

Ryssen²

2001

SA J. An. Sci.

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Italian ryegrass (Lolium multiflorum cv. Midmar) is often fertilized with high levels of nitrogen (N) in order to ensure maximum dry matter (DM) yields. This practice also increases the N content of herbage. This study was conducted to determine whether differences in the nitrogen (N) content of Italian ryegrass would have an effect on the performance of South African Mutton Merino lambs. Fertilizer levels of 100, 200, 400, 600 or 800 kg N/ha were applied to the pastures in order to produce herbage containing varying concentrations of N. Nitrogen fertilization increased the total N and nitrate-N in the plant material and decreased non-structural carbohydrate concentrations. An increase in rumen ammonia-N concentration with increasing pasture N concentration was observed in twelve and four-month-old lambs. A quadratic relationship was found to exist between the N content of ryegrass and DM intake for twelve-month-old lambs, and a negative linear relationship was observed for four-month-old lambs. A quadratic relationship was observed between the N content of ryegrass and average daily gain for lambs of both age groups. The equations derived in this study illustrate the potentially negative effects of high concentrations of N and nitrate-N in Italian ryegrass on intake and growth rate of lambs.

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Utilization ofLolium multiflorumby sheep 1. Influence of dry matter content and correlated factors on voluntary intake

Cited by 11 publications

References 14 publications

A comparison of Italian ryegrass (<i>Lolium multiforum</i>) cultivars Exalta and Midmar with respect to their nutritive value for sheep

A comparison of Italian ryegrass (<i>Lolium multiforum</i>) cultivars Exalta and Midmar with respect to their nutritive value for sheep

Utilization ofLolium multiflorumby sheep 2. The effect of drying the herbage on soluble nitrogen content and partial digestion

Performance responses of lambs of various ages to Italian ryegrass (<i>Lolium multiflorum</i>) fertilized with various levels of nitrogen

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