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The influence of hexazinone on carbon dioxide evolution and mineralization of nitrogen, phosphorus and sulfur in a forest soil
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| Zeitschriftentitel: | Canadian Journal of Soil Science |
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| Personen und Körperschaften: | |
| In: | Canadian Journal of Soil Science, 73, 1993, 4, S. 433-445 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Canadian Science Publishing
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| Schlagwörter: |
| Zusammenfassung: | <jats:p> The effect of hexazinone (applied as Velpar L.) on carbon dioxide (CO<jats:sub>2</jats:sub>) evolution, nitrogen (N), phosphorus (P), and sulfur (S) mineralization in a surface organic layer (L–H horizons) of a forest soil was followed during a 150-d laboratory incubation. Hexazinone was applied at recommended field rates equivalent to 2 and 4 kg a.i. ha<jats:sup>−1</jats:sup> and at a higher rate, 8 kg a.i. ha<jats:sup>−1</jats:sup>. A bioassay determined that hexazinone at 4 and 8 kg a.i. ha<jats:sup>−1</jats:sup> affected the root and shoot biomass of oats for up to 63 d after application. Hexazinone had no effect on CO<jats:sub>2</jats:sub> evolution, ammonification, nitrification or net S mineralization in the L–H horizons. An increase in extractable P was found in the hexazinone-treated soils at the end of the incubation. Hexazinone applied at recommended field rates of 2 and 4 kg a.i. ha<jats:sup>−1</jats:sup> would have little direct impact on nutrient-cycling processes in the L–H horizons of mixed-wood cutovers. Key words: Hexazinone, carbon dioxide evolution, nitrogen, phosphorus, sulfur, forest soils </jats:p> |
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| Umfang: | 433-445 |
| ISSN: |
0008-4271
1918-1841 |
| DOI: | 10.4141/cjss93-045 |