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Details van artikel 22 van 58 gevonden artikelen
| Titel: |
Evaluation of various nitrogen sources and rates on nitrogen movement, pensacola bahiagrass production, and water quality |
| Auteur: |
Sveda, R. Rechcigl, J. E. Nkedi-Kizza, P. |
| Verschenen in: |
Communications in soil science and plant analysis |
| Paginering: | Jaargang 23 (1992) nr. 17-20 pagina's 2451-2478 |
| Jaar: |
1992-11 |
| Inhoud: |
Movement of N through the soil profile under various N sources and rates was investigated in order to provide information that can be used to protect groundwater quality in Florida. The objective of this greenhouse experiment was to determine the distribution and leaching potential of various rates (0, 84 and 168 kg N ha-1) and sources ((NH4)2SO4 and NH4NO3) of N applied to Pensacola bahiagrass (Paspalum notatum Flugge). Bahiagrass sod was planted in PVC soil columns which were packed using each horizon (Ap, A22, Bh) of a virgin Myakka fine sand soil (sandy, siliceous, hyperthermic Aeric Haplaquods). Water was added to the soil columns once every 4 d and the effluent was collected from each soil column twice a week for a period of 3 months. Water and soil samples from each horizon (collected at the end of the experiment) were analyzed for NO3-N, NH4-N, pH, and electrical conductivity. Yield and tissue N were determined on grass samples harvested every 30 d. There was no significant differences in yield between N sources, however, there were trends showing yields to be higher with (NH4)2SO4 as compared to NH4NO3. Nitrogen recovery was highest at the 84 kg N ha-1 rate and was greatest with (NH4)2SO4. Water NO3-N concentrations were below the U.S. E.P.A. 10 mg L-1 water quality standard and averaged 0 - 0.2 mg NO3-NL-1. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 22 van 58 gevonden artikelen
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