Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2016
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Authors
Mohammad Tahir Waheed Muhammad Sameeullah Faheem Ahmed Khan Tahira Syed Manzoor Ilahi Johanna Gottschamel Andreas Günter LösslAbstract
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Nicholas ClarkeAbstract
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Kirsten TørresenAbstract
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Jihong Liu ClarkeAbstract
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Abstract
Aim: The objective was to assess the nitrogen provided to following crops by peas and fava beans, with varying legume residue incorporation and use of cover crops. Meth: Organic field trial, ‘spilt-split plot design’ with 4 blocks. Whole plots (spring 2014) had legumes (pea or faba beans), and sub plots (autumn 2014) had 4 autumn soil treatments with combinations of legume residue incorporation and cover crop. The sub-sub plots (spring 2015) were with and without additional manure fertilization. Res: The root biomass of both legume pre cops had equal nitrogen (N) concentration, but total root biomass was twice as high for fava beans as for peas (5.08 vs. 2.41 kg m-2). Fava bean pre crop with biomass incorporation without cover crop gave the highest broccoli yield (4.10 t ha-1) compared with pea pre crop with biomass incorporation and no cover crop (2.44 t ha -1). Also the last crop in the rotation, lettuce, had 94% higher yield after fava beans (6.6 t ha-1) compared to peas (3.4 t ha-1). Rye as cover crop efficiently assimilated and conserved N during winter, shown by a 4 to 5 fold reduction in soil NO3-N, and nearly 2 fold reduction in soil N-min levels, compared to open soil. Additional manure application affected crop yield, with 3 and 2 fold increase in broccoli and lettuce respectively. Conc: Fava beans as pre crop resulted in higher yields of broccoli and lettuce the following seasons, compared to peas. This was explained twice as much root biomass for that crop.
Authors
Randi Berland FrøsethAbstract
No abstract has been registered