Irrigation and Nitrogen Management for Sprinkler-irrigated Cabbage on Sand
| Autor: | Charles A. Sanchez, R.L. Roth, B.R. Gardner |
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| Rok vydání: | 1994 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 119:427-433 |
| ISSN: | 2327-9788 0003-1062 |
| DOI: | 10.21273/jashs.119.3.427 |
| Popis: | Six field studies were conducted from 1980-88 to evaluate the response of cabbage (Brassica oleracea L., Capitata group) to sprinkler irrigation and sprinkler-applied N fertilizer on a coarse-textured soil. The plots were irrigated using a modified self-moving lateral sprinkler irrigation system that applied five levels of water and five levels of N (liquid NH4NO3) in specified combinations of central composite rotatable design. Cabbage yields were significantly increased by water and N applications in all experiments. The N rates predicted for maximum yield exceeded typical cabbage N fertilizer recommendations. However, the above-average plant populations used in these studies resulted in above-average yields and plant N accumulation. Deficit and excess irrigation produced negative results. Generally, cabbage production was optimized and N losses to the environment were minimized when crops were irrigated for evapotranspiration (ET) replacement. However, even when irrigated for ET replacement, these data demonstrate the potential for N leaching at high N rates, presumably as a result of rainfall. |
| Databáze: | OpenAIRE |
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