Plant and Soil

, Volume 195, Issue 2, pp 299–309

Field observations on nitrogen catch crops. I. Potential and actual growth and nitrogen accumulation in relation to sowing date and crop species

  • J. Vos
  • P.E.L. van der Putten

DOI: 10.1023/A:1004281218996

Cite this article as:
Vos, J. & van der Putten, P. Plant and Soil (1997) 195: 299. doi:10.1023/A:1004281218996


In temperate climates with a precipitation surplus during autumn and winter, nitrogen catch crops can help to reduce nitrogen losses from cropping systems by absorbing nitrogen from the soil and transfer it to a following main crop. The actual and potential accumulation of dry matter and nitrogen in catch crops were studied in the field during four seasons with winter rye (Secale cereale) and forage rape (Brassica napus ssp. oleifera (Metzg.) Sinsk) or oil radish (Raphanus sativus spp. oleiferus (DC.) Metzg.). Sowing dates were end of August and three and six weeks later. Potential nitrogen accumulation, Y (g m-2), could be summarized with Y = 96 −0.34 X, where X is the day number in the year of the sowing date (range: late August till end of September). Species were compared in their performance, looking at differences in specific leaf area, leaf weight ratio, leaf area ratio, light extinction and persistence during frost. The rate of dry matter accumulation in intervals of 14 days appeared to be determined primarily by the amount of radiation intercepted. A regression, forced through the origin, gave as a common slope 1.12 g dry matter accumulated per MJ intercepted global radiation, irrespective of season, species, sowing date or nitrogen treatment (period from ca. day 250 to day 310). From this result the inference is made that leaf expansion is a key process, determining the performance of catch crop species under varying environmental conditions.

Brassica napuscover cropradiation use efficiencyRaphanus sativusSecale cereale

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • J. Vos
  • P.E.L. van der Putten

There are no affiliations available