OPTIMUM DISTRIBUTION BETWEEN AUTUMN-APPLIED AND SPRING-APPLIED NITROGEN IN SEED PRODUCTION OF TALL FESCUE |
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| Authors: | René Gislum Lise C. Deleuran Kristian Kristensen Birte Boelt |
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| Affiliation: | 1. Department of Agroecology , Aarhus University , Slagelse , Denmark;2. Department of Agroecology , Aarhus University , Foulum , Denmark |
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| Abstract: | The effect of different autumn and spring nitrogen (N) application rates on plant establishment, plant development, and seed yield were tested in a field experiment using tall fescue (Festuca arundinacea Schreb.). Results clearly showed that the optimum distribution of N between autumn and spring to achieve the highest seed yield and economical benefit was dependent on the choice of cover crops and location. The economically optimum N application rate was in the range from 44 to 73 kg ha?1 in autumn and 94 to 157 kg ha?1 in spring. The results are discussed in relation to Danish N regulations and plant establishment and development. |
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| Keywords: | Festuca arundinacea Schreb nitrogen seed yield optimum nitrogen application rate economical optimum nitrogen application rate |
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