Askegaard, M. and Eriksen, E. (2007) Growth of legume and nonlegume catch crops and residual-N effects in spring barley on coarse sand. J. Plant Nutrition and Soil Science, 170, pp. 733-780.
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The aim of this experiment was to investigate the growth and residual-nitrogen (-N) effects of different catch-crop species on a low–N fertility coarse sandy soil. Six legumes (white clover [Trifolium repens L.], red clover [Trifolium pratense L.], Persian clover [Trifolium resupinatum L.], black medic [Medi-cago lupulina L.], kidney vetch [Anthyllis vulneraria L.], and lupin [Lupinus angustifolius L.]), four non legumes (rye grass [Lolium perenne L.], chicory [Cichorium intybus L.], fodder radish [Raphanus sativus L.],and sorrel [Rumex Acetósa L.]), and one mixture (rye/hairy vetch [Secale cereale L./Vicia villosa L.])were tested in a field experiment with three repli-cates in a randomized block design. Four reference treat-ments without catch crops and with N application (0, 40, 80, and 120 kg Nha–1) to a succeeding spring barley were included in the design. Due to their ability to fix N2, the legume catch crops had a significantly larger abovegrounddry-matter production and N content in the autumn than the non legumes. The autumn N uptake of the nonlegumes was 10–13 kg Nha–1 in shoots and approx. 9 kg ha–1 in the roots. The shoot N content of white clover, black medic, red clover, Persian clover, and kidney vetch was 55–67 kg ha–1, and the root N content in white clover and kidney vetch was approx. 25 kg ha–1. The legume catch crops, especially white and red clover, seemed to be valuable N sources for grain production on this soil type and their N fertilizer-replacement values in a following unfertilized spring barley corresponded to 120 and 103 kg Nha–1, respectively. The N fertilizer–replacement values exceeded the N content of shoots and roots.
|EPrint Type:||Journal paper|
|Keywords:||catch-crop species, N fertilizer-replacement value, shoot N content, root N content|
|Subjects:|| Soil > Nutrient turnover|
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Crop husbandry > Crop combinations and interactions
|Research affiliation:||Denmark > DARCOF II (2000-2005) > I.10 (VegCatch) Organic vegetable cultivation methods and use of catch crops|
|Deposited By:||Askegaard, Margrethe|
|Deposited On:||04 Apr 2006|
|Last Modified:||05 Nov 2012 12:54|
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