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Milk Production and Intake of Lactating Cows Fed Raw or Extruded Peas1

Milk Production and Intake of Lactating Cows Fed Raw or Extruded Peas1,10.3168/jds.S0022-0302(97)76313-6,Journal of Dairy Science,Hélène V. Petit,R. R

Milk Production and Intake of Lactating Cows Fed Raw or Extruded Peas1   (Citations: 21)
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Primiparous (n = 9 ) and multiparous (n = 18) Holstein cows averaging 584 ± 15 kg of body weight ( X ± SE) were allotted at 2 wk postpartum to nine groups ( 3 primiparous and 6 multiparous) of 3 cows each to determine the effects of pea extrusion on ruminal degradability and milk production. Cows were fed a total mixed diet based on timothy silage and concentrate for ad libitum intake. The experi- ment was carried out between wk 4 and 15 of lacta- tion. Cows within each group were assigned randomly to isonitrogenous and isoenergetic concentrates based on corn plus soybean meal, raw peas, or extruded peas. Extrusion of peas increased the ruminal degrad- ability of starch but had no effect on the ruminal degradability of crude protein. Cows fed extruded peas had higher dry matter intakes and plasma urea N concentrations than did those fed soybean meal; no differences were detected between cows fed extruded and raw peas. Production of 4% fat-corrected milk and milk composition generally were similar for cows fed the various diets. Digestibilities of dry matter and N were higher for cows fed extruded peas than for cows fed soybean meal or raw peas. These data suggest that peas can substitute for soybean meal as the protein source in diets of early lactation cows without adverse effects on production and that, in this study, the extrusion of peas had no beneficial effect on milk production.
Journal: Journal of Dairy Science - J DAIRY SCI , vol. 80, no. 12, pp. 3377-3385, 1997
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    • ...Changes in chemical composition of flaxseed as a result of extrusion were opposite to those noted for micronization (Table 2). The effects of extrusion on fiber fractions of flaxseed reported in our study agree with other researchers who reported reduction in NDF and ADF concentrations of oilseeds as a result of extrusion (Chapoutot and Sauvant, 1997; Petit et al., 1997; Van Dijk et al., 1983)...
    • ...Other studies also showed no effect of feeding heat-treated oilseeds on total tract fiber digestion (Scott et al., 1991, Petit et al., 1997; Shabi et al., 1999)...

    C. Gonthieret al. Effects of Feeding Micronized and Extruded Flaxseed on Ruminal Ferment...

    • ...Field pea has been shown to be an effective replacement for soybean meal (SBM; Corbett et al., 1995; Khorasani et al., 1992) and SBM and canola meal combinations (Petit et al., 1997) in diets fed to lactating dairy cows...
    • ...Field pea has been shown to be an effective substitute for SBM in early lactation diets (Petit et al., 1997) and canola meal and SBM in high-producing dairy cow diets (Corbett et al., 1995)...

    E. R. Loeet al. Field pea ( Pisum sativum) inclusion in corn-based lamb finishing diet...

    • ...During wk 16 of lactation, total feces, urine, and milk were collected from each cow during 6 d as described by Petit et al. (1997)...
    • ...Dry matter of other feed ingredients was obtained by drying at 100°C for 48 h. Concentrations of D- and Llactate in silages were determined according to the methodsofGawehnandBermeyer(1974)andGutmann and Wahlefeld (1974), respectively, with modifications described by Petit et al. (1997)...
    • ...Silage VFA were determined using gas chromatography (Petit et al. 1997)...

    D. R. Ouelletet al. Effects of Corn Silage Processing and Amino Acid Supplementation on th...

    • ...Earlier studies had suggested that pea could successfully replace other protein supplements such as soybean meal without having negative effects on milk production (Syrja ¨la ¨-Qvist et al., 1981; Khorasani et al., 1992; Corbett et al., 1995; Petit et al., 1997)...

    H. Khaliliet al. Effect of protein and energy supplements on milk production in organic...

    • ...Effect of extrusion on pea protein and starch characteristics has been well studied for early lactation cows (Petit et al., 1997), as well as in situ in heifers (Focant et al., 1990) and in bulls (Walhain et al., 1992) and in sheep (Aufrere et al., 2001)...
    • ...Extrusion of peas increases rumen degradability of starch but had no effect on rumen degradable protein according to Petit et al. (1997), but Walhain et al. (1992) observed a dramatically reduced CP effective degradability...
    • ...The DM intake is higher in cows fed extruded peas as compared to those fed soybean meal (SBM), and the milk protein content is higher for cows fed peas, otherwise there is no difference in production of 4 % FCM and milk composition (Petit et al., 1997)...
    • ...Therefore, peas can substitute SBM completely as a protein source in the diet of early lactation cows (Petit et al., 1997)...
    • ...Extrusion of peas at temperatures 140ºC and above has no beneficial effect on protein protection (Walhain et al., 1992) and milk production (Petit et al., 1997)...
    • ...Furthermore, even fewer (Petit et al., 1997) studies have been performed evaluating the effect of processing on feed intake and production parameters in dairy cows...

    Tomas Rondahl. The effect of different processing methods on rumen degradation of pro...

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