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Influence of fertilizer nitrogen on herbage dry matter and nitrogen yields and botanical composition of a grazed grass clover pasture

Ball, R.; Molloy, L.F.; Ross, D.J.

New Zealand Journal of Agricultural Research 21(1): 47-56

1978

ISSN/ISBN: 0028-8233
Accession: 005684755
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The response of a ryegrass[Lolium (multiflorum .times. perenne) .times. perenne]-white clover [Trifolium repens] pasture, grazed by sheep, to lime NH4NO3 was studied. A dry matter (DM) yield response to annual inputs of 112 and 448 kg N/ha was clearly established. The heavier rate gave diminishing returns, but resulted in a 20% increase in total yield over the 18 t [tons] DM/ha recorded in the absence of applied N. Ryegrass responded and clover was suppressed with N use. The reduction in clover yield was small (15%) and unrelated to N rate. Herbage N yields are reported. Annual turnover of N through herbage ranged 720 kg/ha for the control (no N) to 920 kg/ha with the heavier N input. Apparent recoveries of N for the year, 38 and 46%, respectively, and are considered in relation to N rate, seasonal influences and effects of N on clover performance.

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Related References

Ball, R.; Molloy, L.F.; Ross, D.J. 1978: Influence of fertiliser nitrogen on herbage dry matter and nitrogen yields, and botanical composition of a grazed grass-clover pasture New Zealand Journal of Agricultural Research 21(1): 47-55
Ross, D.J.; Molloy, L.F.; Collie, T.W.; Ball, R. 1978: Influence of fertilizer nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass clover herbage New Zealand Journal of Agricultural Research 21(2): 231-240
Ross, D.J. 1978: Influence of methods of determination and time of day on contents of nonstructural carbohydrates in grazed rye grass clover herbage from a nitrogen fertilized pasture New Zealand Journal of Agricultural Research 21(2): 223-230
Cop, J.; Korosec, J. 1993: Botanical composition and herbage yield of grass/white clover mixtures in relation to nitrogen fertilizer rates Zbornik Biotehniske Fakultete Univerze Edvarda Kardelja v Ljubljani, Kmetijstvo 61: 67-74
Molloy, L.F.; Ball, R.; Collie, T.W.; Ross, D.J. 1978: Influence of fertilizer nitrogen on higher fatty acids and on magnesium calcium potassium and phosphorus in grazed grass clover herbage New Zealand Journal of Agricultural Research 21(1): 57-64
Ross, D.J.; Molloy, L.F.; Collie, T.W.; Ball, R. 1978: Influence of fertiliser nitrogen on nitrogen fractions and nonstructural carbohydrates in grazed grass-clover herbage New Zealand Journal of Agricultural Research 21(2): 231-239
Reid, D. 1961: Factors influencing the role of clover in grass-clover leys fertilized with nitrogen at different rates. 1. The effects of the variety of companion grass on the yields of total herbage and of clover. 2. The effects of the variety of white clover on the yields of total herbage and of clover J. agric. Sci 56(2): 143-60
Walker, T.W.; Adams, A.F.R.Orchiston, H.D. 1953: The use Of fertilizers on herbage cut for conservation. IV. The effect of rates, methods of application and forms of fertilizer nitrogen on the yields of dry matter and nitrogen of grasses and clovers in a ryegrass and white clover sward, cut at different stages of growth J. brit. Grassl Soc 8: 281-299
Molloy, L.F.; Ball, R.; Collie, T.W.; Ross, D.J. 1978: Influence of fertiliser nitrogen on higher fatty acids and on Mg, Ca, K, and P in grazed grass-clover herbage New Zealand Journal of Agricultural Research 21(1): 57-64
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