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Abstract A total of 445 pasture samples were collected from six fields representing a wide range of dry grass content (0–100%), and grass, legume, herb, flower and weed species. Fields were located in the grass‐dominated and temperate regions of western UK and monitored monthly for 9 months during late summer, autumn and winter months. The pasture properties assessed included measurements of percentage of grass content, height (in centimeters), pasture cover (fresh weight (FW) and dry matter (DM) in kg /ha) and pasture density (FW and DM in kg ha −1 cm −1 ) and nutrient concentrations (DM, crude protein, acid detergent fiber (ADF), neutral detergent fiber (NDF), sugars, ash, digestible organic matter in the DM (DOMD), oil, nitrate nitrogen and metabolizable energy (ME)). This study showed that across the pastures studied, increasing both pasture height and DM cover brought a desirable increase in crude protein, sugars, DOMD, oil and ME for grazing systems. Seasonal changes in nutrient concentrations of diverse swards will occur; however, differences in nutrient concentrations among swards can be minimized by the grass species present and/or mix with broadleaf plants, and management of grass maturity.
Bell et al. (Mon,) studied this question.
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