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| Titel: |
Nitrogen efficiency in grain sorghum |
| Auteur: |
Maranville, J. W. Clark, R. B. Ross, W. M. |
| Verschenen in: |
Journal of plant nutrition |
| Paginering: | Jaargang 2 (1980) nr. 5 pagina's 577-589 |
| Jaar: |
1980 |
| Inhoud: |
Grain sorghum, Sorghum bicolor (1.) Moench has not been fully evaluated for its variability in nitrogen efficiency. A 2-year study using 12 hybrids was conducted and nitrogen efficiency was calculated as: 1. total dry matter (DM) per unit N uptake (NE1), 2. total grain yield per unit N uptake (NE2), and 3. the product of NE2 and the grain N:stover N ratio (NE3). NE1 values increased with plant age and were significantly different among hybrids at all stages of growth. A 20% difference in NE1 was found between the least and most efficient hybrids at maturity. A significant hybrid x year interaction showed that the environment strongly influenced hybrid ranking. Hybrids which ranked high in one year often did poorly the other year and visa versa for NE1, NE2, or NE3. Each N efficiency criterion ranked the hybrids differently, although NE1 and NE2 appeared to be the most closely related. Hybrids generally maintained satisfactory values for NE3 if one parent (either male or female) had a high NE3 value in hybrid combination. Differences were more dramatic for partitioning of N between grain and stover than for NE values among hybrids. Due to environmental influences, it appears that at least 3 or more years of data may be needed in order to establish consistent trends for N efficiency in grain sorghum. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 6 van 9 gevonden artikelen
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