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Effect of application timing and grass height on the nitrogen fertilizer replacement value of cattle slurry applied with a trailing‐shoe application system
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Titel: |
Effect of application timing and grass height on the nitrogen fertilizer replacement value of cattle slurry applied with a trailing‐shoe application system |
In: | Grass and Forage Science, 69, 2014, 3, S. 488-501 |
veröffentlicht: |
Wiley
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Umfang: | 488-501 |
ISSN: |
0142-5242 1365-2494 |
DOI: | 10.1111/gfs.12051 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>This study investigated the effect of using a trailing‐shoe system to apply cattle slurry, under different conditions of grass height (low [<jats:styled-content style="fixed-case">LG</jats:styled-content>]: freshly cut sward [4–5 cm height] vs. high [<jats:styled-content style="fixed-case">HG</jats:styled-content>]: application delayed by 7–19 d and applied to taller grass sward [4–11 cm] height) and month of application (June vs. April), on the nitrogen fertilizer replacement value (<jats:styled-content style="fixed-case">NFRV</jats:styled-content>) and apparent N recovery (<jats:styled-content style="fixed-case">ANR<jats:sub>S</jats:sub></jats:styled-content>) of cattle slurry applied to grassland. <jats:styled-content style="fixed-case">NFRV</jats:styled-content> was calculated using two methods: (i) <jats:styled-content style="fixed-case">NFRV<jats:sub>N</jats:sub></jats:styled-content> based on the apparent recovery of slurry‐N relative to that of mineral‐N fertilizer; and (ii) <jats:styled-content style="fixed-case">NFRV<jats:sub>DM</jats:sub></jats:styled-content> based on <jats:styled-content style="fixed-case">DM</jats:styled-content> yield. The effect of applying slurry into <jats:styled-content style="fixed-case">HG</jats:styled-content> swards, relative to <jats:styled-content style="fixed-case">LG</jats:styled-content> swards, decreased the <jats:styled-content style="fixed-case">DM</jats:styled-content> yield by 0·47 t ha<jats:sup>−1</jats:sup> (<jats:italic>P </jats:italic>≤<jats:italic> </jats:italic>0·001), N uptake by 5 kg ha<jats:sup>−1</jats:sup> (<jats:italic>P</jats:italic> = 0·05), <jats:styled-content style="fixed-case">ANR<jats:sub>S</jats:sub></jats:styled-content> by 0·05 kg kg<jats:sup>−1</jats:sup> (<jats:italic>P</jats:italic> = 0·036), <jats:styled-content style="fixed-case">NFRV<jats:sub>N</jats:sub></jats:styled-content> by 0·05 kg kg<jats:sup>−1</jats:sup> (<jats:italic>P</jats:italic> = 0·090) and <jats:styled-content style="fixed-case">NFRV<jats:sub>DM</jats:sub></jats:styled-content> by 0·11 kg kg<jats:sup>−1</jats:sup> (<jats:italic>P </jats:italic><<jats:italic> </jats:italic>0·001). It was concluded that the main factor causing these decreases with <jats:styled-content style="fixed-case">HG</jats:styled-content>, compared with <jats:styled-content style="fixed-case">LG</jats:styled-content> applications, was wheel damage affecting subsequent N uptake and growth of the taller grass sward.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |