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Evaluation of the current Belgian N fertilisation advice system for butterhead lettuce grown under glass

(1999) Acta Horticulturae. 506. p.93-98
Author
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Abstract
N fertilization advice systems for lettuce are designed to meet EU regulations to control nitrate concentrations in edible plant parts. This study evaluates current fertiliser practice on the uptake and loss of N for butterhead lettuce. Field trials were carried out in 8 greenhouses in the province of West-Flanders, Belgium. Results show that under normal lettuce growth, N uptake varied between 90 and 120 kg N ha(-1) and the NO3--limit was never exceeded. Although product-quality was assured, discrepancies between decrease of N-min expected residual soil N-min at harvest and measured residual soil N-min were observed. As N uptake mainly occurs from the 0-30 cm layer (rooting depth), a residual N-min of 60-80 kg N ha(-1) (0-30 cm) and low N-min values in the 30-120 cm layer were expected. However, during winter there was no decrease in the soil mineral N and N-min values (0-30 cm) up to 300 kg N ha(-1) were measured. During spring and early summer, the decrease in the upper soil layer greatly exceeded maximum N uptakes, sometimes leaving less than 60 kg N ha(-1) in the upper layer, possibly because of gaseous N2O and N-2 losses. In addition, high N-min values (30-120 cm), of up to 900 kg N ha(-1), were measured. To avoid on the one hand high residual soil N-min at harvest and possible high leaching losses and on the other N deficiency and possible gaseous losses, measures were evaluated to minimise the difference between the available nitrogen in the soil profile and the N need of the crop. An alternative mineral N balance method is proposed, where in addition to uptake and residual N-min, N mineralisation and N losses will be considered. This method should result in an improved use of N fertilisers with minimal impact on the environment.
Keywords
mineral N balance method, Lactuca sativa L-var. capitata L., greenhouses, environmental friendly production, AMMONIUM, NITROGEN, NITRATE, NITRITE, SOILS

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Chicago
Salomez, Joost, Georges Hofman, Marc Van Meirvenne, Oswald Van Cleemput, P Bleyaert, and A Calus. 1999. “Evaluation of the Current Belgian N Fertilisation Advice System for Butterhead Lettuce Grown Under Glass.” In Acta Horticulturae, ed. GD Bending, IG Burns, and B Mulhollaand, 506:93–98. Leuven, Belgium: International Society for Horticultural Science (ISHS).
APA
Salomez, J., Hofman, G., Van Meirvenne, M., Van Cleemput, O., Bleyaert, P., & Calus, A. (1999). Evaluation of the current Belgian N fertilisation advice system for butterhead lettuce grown under glass. In G. Bending, I. Burns, & B. Mulhollaand (Eds.), Acta Horticulturae (Vol. 506, pp. 93–98). Presented at the International workshop on Ecological Aspects of Vegetable Fertilisation in Integrated Crop Production in the Field, Leuven, Belgium: International Society for Horticultural Science (ISHS).
Vancouver
1.
Salomez J, Hofman G, Van Meirvenne M, Van Cleemput O, Bleyaert P, Calus A. Evaluation of the current Belgian N fertilisation advice system for butterhead lettuce grown under glass. In: Bending G, Burns I, Mulhollaand B, editors. Acta Horticulturae. Leuven, Belgium: International Society for Horticultural Science (ISHS); 1999. p. 93–8.
MLA
Salomez, Joost, Georges Hofman, Marc Van Meirvenne, et al. “Evaluation of the Current Belgian N Fertilisation Advice System for Butterhead Lettuce Grown Under Glass.” Acta Horticulturae. Ed. GD Bending, IG Burns, & B Mulhollaand. Vol. 506. Leuven, Belgium: International Society for Horticultural Science (ISHS), 1999. 93–98. Print.
@inproceedings{400575,
  abstract     = {N fertilization advice systems for lettuce are designed to meet EU regulations to control nitrate concentrations in edible plant parts. This study evaluates current fertiliser practice on the uptake and loss of N for butterhead lettuce. Field trials were carried out in 8 greenhouses in the province of West-Flanders, Belgium. Results show that under normal lettuce growth, N uptake varied between 90 and 120 kg N ha(-1) and the NO3--limit was never exceeded. Although product-quality was assured, discrepancies between decrease of N-min expected residual soil N-min at harvest and measured residual soil N-min were observed. As N uptake mainly occurs from the 0-30 cm layer (rooting depth), a residual N-min of 60-80 kg N ha(-1) (0-30 cm) and low N-min values in the 30-120 cm layer were expected. However, during winter there was no decrease in the soil mineral N and N-min values (0-30 cm) up to 300 kg N ha(-1) were measured. During spring and early summer, the decrease in the upper soil layer greatly exceeded maximum N uptakes, sometimes leaving less than 60 kg N ha(-1) in the upper layer, possibly because of gaseous N2O and N-2 losses. In addition, high N-min values (30-120 cm), of up to 900 kg N ha(-1), were measured. 
To avoid on the one hand high residual soil N-min at harvest and possible high leaching losses and on the other N deficiency and possible gaseous losses, measures were evaluated to minimise the difference between the available nitrogen in the soil profile and the N need of the crop. An alternative mineral N balance method is proposed, where in addition to uptake and residual N-min, N mineralisation and N losses will be considered. This method should result in an improved use of N fertilisers with minimal impact on the environment.},
  author       = {Salomez, Joost and Hofman, Georges and Van Meirvenne, Marc and Van Cleemput, Oswald and Bleyaert, P and Calus, A},
  booktitle    = {Acta Horticulturae},
  editor       = {Bending, GD and Burns, IG and Mulhollaand, B},
  isbn         = {9789066058026},
  issn         = {0567-7572},
  keywords     = {mineral N balance method,Lactuca sativa L-var. capitata L.,greenhouses,environmental friendly production,AMMONIUM,NITROGEN,NITRATE,NITRITE,SOILS},
  language     = {eng},
  location     = {Wellesbourne, UK},
  pages        = {93--98},
  publisher    = {International Society for Horticultural Science (ISHS)},
  title        = {Evaluation of the current Belgian N fertilisation advice system for butterhead lettuce grown under glass},
  url          = {http://www.actahort.org/books/506/506_11.htm},
  volume       = {506},
  year         = {1999},
}

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