Nitrate leaching from cut grassland as affected by the substitution of slurry with nitrogen mineral fertilizer on two soil types

J.J. Schröder, F.B.T. Assinck, D. Uenk, G.L. Velthof

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26 Citations (Scopus)

Abstract

A field experiment was conducted to find out whether there is any difference in risk of N leaching to groundwater when cattle slurry and/or mineral fertilizer-N was applied to cut grassland. The experiment was carried out over two consecutive years on two sites (one with a relatively wet sandy soil and one with a relatively dry sandy soil). Treatments were mineral fertilizer-N at annual rates of 0–510 kg N ha-1 year-1 and combinations of sod-injected cattle slurry (85, 170, 250 and 335 kg N ha-1 year-1) and mineral fertilizer-N (289, 238, 190 and 139 kg N ha-1 year-1). Yield responses indicated that in the short run, 0·44–0·88 (average 0·60) of the slurry-N was as available as mineral fertilizer-N. The total N input from mineral fertilizer and slurry was a worse predictor of nitrate leaching ( 0·11) than the N surplus (i.e. the difference between total N input and harvested N) ( 0·60). The effective N surplus, based on the difference between the summed inputs of the plant-available N and harvested N, proved to be the best indicator of leaching ( 0·86). Annual N application rates of up to 340 kg plant-available N ha-1 complied with the target nitrate concentration in groundwater of 11·3 mg N L-1 set by the European Union in both years on the wet sandy soil, whereas on the dry sandy soil none of the treatments did.
Original languageEnglish
Pages (from-to)49-57
JournalGrass and Forage Science
Volume65
Issue number1
DOIs
Publication statusPublished - 2010

Keywords

  • cattle slurry
  • sandy soils
  • netherlands
  • management
  • losses
  • manure
  • yield

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