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Details van artikel 3 van 9 gevonden artikelen
| Titel: |
Dry matter accumulation, N uptake, and chemical composition of tobacco grown with different N sources at two levels of K |
| Auteur: |
Scherer, H. W. MacKown, C. T. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 10 (1987) nr. 1 pagina's 1-14 |
| Jaar: |
1987-01 |
| Inhoud: |
Tobacco (Nicotiana tabacum L. cv. KY 14) was grown for 5 and 9 days in nutrient solutions containing 3.0 mM N and either 0.1 or 1.0 mM K+. N was supplied either as NO-3 or a mixture of NO-3 and NH+4 at 3:1 and 1:1 ratios. Solutions were changed daily to minimize pH changes and nutrient depletion. After 9 days tissue dry weights of plants supplied 0.1 mM K were generally less than plants grown with 1.0 mM K+; ; the presence of NH+4 at the low K level did not decrease dry matter accumulation further. Maximum dry matter accumulation occurred at the high K level with 2.25 mM NO-3 and 0.75 mM NH+4. Cumulative NO-3 uptake at high K was greater than for low K for the respective N treatments. Cumulative NH+4 uptake was not affected by K level or NO-3 to NH+4. ratio. Tissue totals cation to anion ratios were not greatly affected and tissue N concentrations in plants receiving both NO-3 and NH+3 were generally greater than NO-3 only. These results indicate that short term growth of tobacco seedlings was greatest when equivalent N was supplied as 2.25 mM NO-3 and 0.75 mM MH+4. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 9 gevonden artikelen
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