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    Milk production and urinary nitrogen excretion of dairy cows grazing plantain in early and late lactation

    Box, LA; Edwards, GR; Bryant, Racheal
    Abstract
    The effects of 50% or 100% of a herbage diet of plantain on milk production and urinary nitrogen (N) concentration were measured in two experiments for late (autumn 2015) and early (spring 2015) lactation dairy cows. Three groups of 12 mixed age Friesian × Jersey dairy cows were offered a perennial ryegrass-white clover pasture, or pure plantain or 50% perennial ryegrass-white clover and 50% pure plantain by ground area (50–50 pasture–plantain). Urine N concentration was lower in both experiments (P < .001) for plantain (2.4 and 2.2 g N/L) and 50–50 pasture–plantain (3.6 and 3.4 g N/L) than pasture (5.4 and 4.7 g N/L). Cows on plantain or 50–50 pasture-plantain produced at least as much milk as those on pasture in both experiments. Plantain may offer environmental benefits to dairy systems by reducing the N concentration of urine deposited on the soil from grazing cows.... [Show full abstract]
    Keywords
    herb; milk production; nitrogen; dairy cows; plantain; Plantago lanceolata; Trifolium repens; Lolium perenne; urinary nitrogen excretion
    Fields of Research
    07 Agricultural and Veterinary Sciences; 0702 Animal Production
    Date
    2017
    Type
    Journal Article
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    DOI
    https://doi.org/10.1080/00288233.2017.1366924
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