Abstract
Experiments were conducted near Sirinka and Mekele in the highlands of northern Ethiopia during 1996 and 1997 to determine effects of integrated nutrient management practices on Striga density and yields of maize (Zea mays) and sorghum (Sorghum bicolor) in farmers fields and on-station. Field trials consisted of a factorial combination of four levels of inorganic fertiliser N (0, 40, 80 and 120 kg N ha-1 from Urea) and four rates of farmyard manure (0, 10, 20 and 30 t ha-1). Striga emergence was minimised with the application of 120 kg N ha-1. The combined application of 40 kg N ha-1 and 30 t ha-1 manure also significantly reduced Striga emergence. The combined application of manure and N (40 kg N ha-1 and 30 t ha-1 for sorghum and 80 kg N ha-1 and 30 t ha-1 manure for maize) increased crop yields at Sirinka during the second season. Thus, improving the N status of the soil help suppress Striga. However, long-term studies are required to quantify these beneficial effects of N on Striga density. Key Words: Ethiopia, N fertilisation, Striga managementRésuméDes essais ont été conduits près de Sirinki et Makele dans les hautes terres du nord d'Ethiopie durant la campagne 1996/97 pour déterminer les effets de la gestion des pratiques integreés d'élements nutritifs sur la densité du Striga et les rendements de maïs ( Zea mays) et le sorgho (Sorghum bicolour (L.)) en champs d'agriculteurs et en station de recherche. Les essais consistaient en une combinaison factorielle de quatre niveaux d'engrais inorganiques d'Azote (0, 40, 80, et 120 kg d'N ha-1 d'urée) et quatre niveaux de fumier de ferme (0, 10, 20 et 30 t ha-1). L'emergence du Striga a été minimisée avec le traitement de 120 kg d'N. L' application combinée de de la fumure et d'N (40 kg d' N et 30 t ha-1 pour le sorgho ; 80 kg d'N ha -1 et 30t ha-1 de fumier pour le maïs) a favorisé l'augmentation des rendements à Sirinka durant la deuxième saison. Ainsi l'amélioration de l'état d'Azote du sol facilitera la suppression du Striga. Cependant, des études à long terme sont nécessaires pour déterminer les effets bénéfiques d'Azote sur la densité du Striga.Mots Clés: Ethiopie, fertilisation d'Azote, gestion du Striga (African Crop Science Journal 8(4) 2000: 403-410)
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Claims 4
Claim · model-written summary
Applying 120 kg N ha-1 minimized Striga emergence.
Zea mays
StrigaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Striga emergence was minimised with the application of 120 kg N ha-1”
t0“yields of maize (Zea mays)”
Claim · model-written summary
Combined 40 kg N ha-1 and 30 t ha-1 manure significantly reduced Striga emergence.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined application of 40 kg N ha-1 and 30 t ha-1 manure also significantly reduced Striga emergence”
t0“yields of maize (Zea mays)”
Claim · model-written summary
Combined nitrogen and manure increased sorghum yield in the second Sirinka season.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined application of manure and N (40 kg N ha-1 and 30 t ha-1 for sorghum and 80 kg N ha-1 and 30 t ha-1 manure for maize) increased crop yields at Sirinka during the second season”
Claim · model-written summary
Combined nitrogen and manure increased maize yield in the second Sirinka season.
- Treatment
- 80 kg N ha-1 and 30 t ha-1 manuree0
- Outcome
- crop yieldse0
- Direction
- increasede0
- Setting
- Sirinkae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The combined application of manure and N (40 kg N ha-1 and 30 t ha-1 for sorghum and 80 kg N ha-1 and 30 t ha-1 manure for maize) increased crop yields at Sirinka during the second season”
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