Nitrogen fertilization of strawberries: Nmin,leaf dry matter,and leaf sap analyses as control methods |
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| Authors: | Holger Daugaard Torkild T. Todsen |
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| Affiliation: | 1. Department of Fruit, Vegetable and Food Science , Danish Institute of Agricultural Sciences , Aarslev, DK‐5792, Denmark;2. Danish Association for Fruit Growers , Lavsenvaenget 20, Odense V, DK‐5200, Denmark |
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| Abstract: | In a three‐year survey several control methods of nitrogen (N) supply in strawberry were investigated. It was found that Nmin analysis could be used as a measurement of control from the beginning of the season, indicating the need of additional N supply. Leaf dry matter analysis, taken during flowering, could be used as an indicator thus making it possible to make corrections within the season, if needed. When leaf dry matter analysis was compared to leaf sap analysis, correlations were evident for the majority of nutrients, N being an important exception. It was concluded that the use of Nmin‐ and leaf dry matter analyses combined might make corrections in N fertilization within the same year possible. |
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