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| Titel: |
N form and concentration: Effects on reproductive development, growth and N content of southern peas |
| Auteur: |
Sasseville, David N. Mills, Harry A. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 1 (1979) nr. 3 pagina's 241-254 |
| Jaar: |
1979 |
| Inhoud: |
Southern peas [Vigna unguiculata, (L.) Walp.] cultured with 100% NH+4 produced no viable flowers, while treatments in which NO-3 composed 50% or more of the N form were not significantly different in the number of flowers formed. Flower abortion was least with 100% NO-3 at the lower N concentration and with 75% and 100% NO-3 at the higher N concentration. Further increments of NH+4 resulted in greater flower abortion. The trends in flower survival were reflected in the number of pods and number of seed/plant. At the lower N concentration, the addition of NH+4 slowed pod maturity, while at the higher N concentration pod maturity was hastened with the addition of up to 50% NH+4. The dry weight and N content of tissues were generally greater with the higher N concentration and with N combinations containing predominantly NO-3, but trends varied with the plant part being analyzed. Ammonium appears to adversely influence reproductive development and/or NO-3 is essential to complete the reproductive development of southern peas. The observed differences in the response of southern peas to N form may account for previously reported discrepancies concerning the effectiveness of N fertilization on growth and yield parameters. Also, vegetative growth and vegetative N content appear to be poor indicators of final seed yields of southern peas if NH+4 supplies a significant portion of the N form utilized by the plant. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 7 gevonden artikelen
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