Efeito da nitrapirina (N-Serve 24E) na nitrificacao do solo e no desenvolvimento de plantas de cacau
The effect of nitrapyrin (2-chloro-6 (trichloromethyl) pyridine) on soils and cacao plants was studied in a greenhouse experiment. Untreated and treated samples of two types of soils were incubated for 13 weeks, maintained at 60 percent of field humidity. The soils treated received ammonium sulfate with increasing amounts of nitrapyrin (0, 1, 5, 10, 20 and 50 ppm). Every 2 weeks samples were taken for nitrogen and ammonia analysis. The effect of the inhibitor on plant growth was evaluated by growing Catongo cacao plants to 5 months of age. These were grown in pots of soils containing calcium nitrate without nitrapyrin for control, and ammonium sulfate without or with nitrapyrin at 1, 5, 10, 20 and 50 ppm. At 10 ppm, nitrification was inhibited and growth stimulated, while at 50 ppm a phytotoxic effect was observed.
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| Format: | biblioteca |
| Published: |
1983
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| Subjects: | THEOBROMA CACAO, METABOLISMO DEL NITROGENO, ETAPAS DE DESARROLLO DE LA PLANTA, INHIBIDORES DE LA NITRIFICACION, CLONES CATONGO, FITOTOXICIDAD, |
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