Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562240
Title Grassland management and nitrate leaching, a model approach
Author(s) Vellinga, Th.V.; Putten, A.H.J. van der; Mooij, M.
Source NJAS Wageningen Journal of Life Sciences 49 (2001)2/3. - ISSN 1573-5214 - p. 229 - 253.
Department(s) WIAS
Livestock & Environment
Publication type Refereed Article in a scientific journal
Publication year 2001
Keyword(s) grasslands - farm management - manures - soil chemistry - nitrates - leaching - models
Categories Farm Management
Abstract To calculate the effect of strategic, tactical and operational grassland management on nitrate leaching, the model Nitrogen, URinc and Pastures (NURP) was developed. Data were collected and relationships developed between (i) herbage production, herbage N content and fertilizer input, (ii) N utilization by cattle and N intake, (iii) soil mineral N accumulation and non-harvested N from fertilizers and urine, and (iv) soil mineral N and nitrate concentration in the upper groundwater. Validation of the model shows good agreement with measured data from farms and monitoring programmes. Calculations show that even on dry sandy soils nitrate concentrations of 50 mg 1-1 in the upper groundwater can be realized by a combination of restricted grazing during the growing season, housing earlier in the season and reduced fertilizer input. The effects of stocking rate, ratio dairy cows:young stock, milk production level, supplementary feeding, drought and urine scorch are discussed.
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