Limits to nitrogen fertilizer on grassland.

Authors

  • W.H. Prins

DOI:

https://doi.org/10.18174/njas.v32i4.16888

Abstract

The effect of N fertilizer on seasonal response of predominantly Lolium perenne grassland, sward quality and productivity, herbage nitrate content and soil mineral N was studied in cutting trials lasting 1-6 years. At an assumed marginal profitability of 7.5 kg DM/kg N applied, the av. opt. annual N application on sand and clay soils was 420 kg/ha. At this rate, herbage nitrate content did not exceed 0.75% NO3 and accumulation of soil mineral N was minimal. At annual N rates exceeding 500 kg/ha sward quality deteriorated and productivity decreased the following year. (Abstract retrieved from CAB Abstracts by CABI’s permission)

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Published

1984-11-01

Issue

Vol. 32 No. 4 (1984)

Section

Papers

License

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