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| Titel: |
Influence of nitrogen fertilization on morphological development of indeterminate and determinate soybeans |
| Auteur: |
Wallace, S. U. Blanchet, R. Bouniols, A. Gelfi, N. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 13 (1990) nr. 12 pagina's 1523-1537 |
| Jaar: |
1990-12 |
| Inhoud: |
Although large quantities of nitrogen are required for high soybean [Glycine max (L.) Merr.] yields, yield increases with N fertilization are not easily achieved. Along with adverse effects on N-fixation, N fertilization has been reported to stimulate excessive vegetative growth, especially in soybeans with the indeterminate growth habit. The objective of this study was to compare the influence of N application (150 kg N/ha, applied in irrigation water between growth stages Rl and R5) on morphological development of the indeterminate cultivar Weber and the semi-dwarf determinate line 172-16. The two genotypes were morphologically similar at growth stage Rl (beginning bloom), but morphological differences were apparent from R3 (beginning pod stage) until maturity, with greater development of main-stem and: branch lengths for Weber than for 172-16.' For Weber, N fertilization greatly stimulated branch length; this was apparent at growth stage R3 and was associated with lodging and disease infestation. For the lodging-resistant 172-16, which had essentially achieved final node numbers by R3, N had little effect on branching or main-stem development. For Weber, substantial yield decreases have been associated with high inputs of N, whereas yields of 172-16 may be more stable or even enhanced as N availability increases. These results may be related to the differential influence of N on vegetative growth responses of these genotypes. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 5 van 10 gevonden artikelen
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