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Évaluation des effets des balles de riz et d'un engrais NPK (4: 1:1)
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ISBN10: 6630474635
ISBN13: 9786630474633
Publisher: Editions Notre Savoir
Published: Sep 14 2026
Pages: 96
Weight: 0.31
Height: 0.23 Width: 6.00 Depth: 9.00
Language: French
ISBN13: 9786630474633
Publisher: Editions Notre Savoir
Published: Sep 14 2026
Pages: 96
Weight: 0.31
Height: 0.23 Width: 6.00 Depth: 9.00
Language: French
Les balles de riz sont des déchets dont le recyclage pourrait améliorer les propriétés physiques, chimiques et biologiques des sols, renforçant ainsi leur productivité. La production de riz à Abuja, au Nigeria, nécessite souvent l'utilisation d'engrais minéraux sous forme de NPK. Cette étude visait à déterminer les meilleurs dosages de balles de riz et d'engrais NPK (4:1:1) pour améliorer le rendement. Des essais en plein champ ont été menés sur trois sites: Kilankwa, Kuje et Kubwa, sur des sols acides de type cambisols ferraques situés entre les latitudes 8,25 et 9,20 au nord de l'équateur et les longitudes 6,45 et 7,39 à l'est du méridien de Greenwich. Des essais d'incubation, en serre et en plein champ ont été réalisés. Les paramètres de croissance et de rendement ont été mesurés. Les effets résiduels ont été suivis au cours de la deuxième année. Les données recueillies ont été analysées. Le rendement en riz paddy des essais en plein champ variait entre 0,40 et 6,40 tonnes/ha, tandis que celui de l'essai sur les effets résiduels en conditions de plein champ se situait entre 0,20 et 5,93 tonnes/ha. Il a été observé que la recommandation actuelle en NPK pour le riz, soit 90 kg par tonne de terre, pouvait être réduite de 33,33 %, soit 60 kg par tonne de terre de NPK, si l'on ajoutait 7,5 tonnes par hectare de balles de riz. La culture suivante, sans apport d'engrais minéral, a donné un rendement économiquement satisfaisant.
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