Effect of Potassium Concentration on Some Agrophysiological Parameters of Pineapple Plants (Ananas comosus L. cv. Smooth Cayenne and MD2) Grown in Côte d'Ivoire

Since the early 2000s, pineapple from Côte d’Ivoire has suffered a discount in its marketing due to the heterogeneity of the quality of its fruit and the arrival of MD2 on the international market. In order to help pineapple from Côte d'Ivoire once again win back the international market, Ananas comosus hybrids with an early natural coloring have been developed at the CNRA. The agronomic performances of these hybrids were tested at the research station of Anguédédou. Vegetative characteristics such as plant fresh mass, stem fresh and dry mass, number of leaves generated and leaf D fresh mass of these hybrids H1, H2, H3 and H4 were compared to those of cultivars Smooth Cayenne and MD2 at 2, 4 and 6 months. The results obtained showed no statistically significant difference in plant mass between hybrid H4 (2675 g) and cultivars MD2 (2645 g) and Smooth Cayenne (2763 g) after 6 months of planting. The fresh and dry mass of the stems of these three varieties were also statistically identical. Hybrid H4 leaf D fresh mass was very low (55 g) at six months of planting compared to the two cultivars (73 g each). Hybrids H2 and H3 at this same period gave leaf masses of over 80 g. Regarding the characteristics assessed, hybrids H4 and H3 had much more conformity with cultivars Smooth Cayenne and MD2.

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Effects of planting bed and mineral fertilization on the production and growth of Extra Sweet pineapple (Ananas comosus L.) aerial suckers in the locality of Bonoua, a town in south eastern Côte d’Ivoire

International Journal of Current Research in Biosciences and Plant Biology ◽

10.20546/ijcrbp.2020.701.003 ◽

2020 ◽

Vol 7 (1) ◽

pp. 23-32

Author(s):

N’guessan Martial Kanga ◽

Mamadou Cherif ◽

Souleymane Sanogo ◽

Seydou Tuo ◽

Edouard Yao Kouadio Jacques ◽

...

Keyword(s):

Cote D'ivoire ◽

Côte D’Ivoire ◽

Ananas Comosus ◽

Mineral Fertilization ◽

Cote D’Ivoire ◽

South Eastern ◽

Côte D'ivoire

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Effets du lit, de la densité de plantation et de la fertilisation sur la croissance végétative de l’ananas (Ananas comosus L., var. MD2) à différentes saisons de planting dans la zone de Bonoua en Côte d’Ivoire

International Journal of Biological and Chemical Sciences ◽

10.4314/ijbcs.v14i7.3 ◽

2020 ◽

Vol 14 (7) ◽

pp. 2398-2414

Author(s):

Marcelline Yao ◽

Brahima Camara ◽

Mamadou Cherif ◽

Généfol Ouattara ◽

Lezin Edson Bomisso ◽

...

Keyword(s):

Trace Elements ◽

Cote D'ivoire ◽

Vegetative Growth ◽

Côte D’Ivoire ◽

Dry Season ◽

Polyethylene Film ◽

Ananas Comosus ◽

Cote D’Ivoire ◽

Côte D'ivoire ◽

Complete Fertilizer

L’objectif de ce travail était de définir un itinéraire de culture favorable à la croissance des plants d’ananas MD2 en fonction des saisons de mise en culture dans la localité de Bonoua, au Sud - Est de la Côte d’Ivoire. Les effets de trois lits de plantation (terrain plat, billon sans un film polyéthylénique et billon recouvert avec un film polyéthylénique) ; de deux densités de plantation (50000 et 70000 plants/ha) ; de quatre types de fumure [F1 (Urée + Potasse) ; F2 (Urée + Potasse + Oligoéléments) ; F3 (Urée + Potasse + Engrais complet) et F4 (Urée + Potasse + Engrais complet + Oligoéléments)] et de deux fréquences d’application de fertilisants (3AP et 7AP) ont été testés. Au terme de la phase végétative du cycle, les comparaisons intersaisons des paramètres mesurés ont montré que quels que soient les traitements appliqués, le nombre de feuilles vivantes et la longueur de la feuille D les plus importants, ont été obtenus lorsque les plantings ont été réalisés à la grande saison pluvieuse. Les masses des feuilles D ont été supérieures au seuil de 70 g pour les plantings effectués pendant la petite et la grande saison pluvieuse, ainsi qu’à la grande saison sèche. La confection de billons a permis aux plants d’ananas MD2 d’avoir une bonne croissance végétative en saison sèche dans la localité de Bonoua.Mots clés : Ananas MD2, croissance, feuille D, saison, Fertilisant, Côte d’Ivoire. English Title: Effects of bedding, planting density and fertilization on the vegetative growth of pineapple (Ananas comosus L., var. MD2) at different planting seasons in the Bonoua zone in Côte d'Ivoire The objective of this work was to define a cultivation itinerary favorable to the growth of MD2 pineapple plants according to the growing seasons in the locality of Bonoua, in the South - East of Côte d'Ivoire. The effects of three planting beds (flat ground, ridge without a polyethylene film and ridge covered with a polyethylene film); two planting densities (50,000 and 70,000 seedlings/ha); four types of manuring [F1 (Urea + Potash)]; F2 (Urea + Potash + Trace elements); F3 (Urea + Potash + Complete fertilizer) and F4 (Urea + Potash + Complete fertilizer + Trace elements)] and two fertilizer application frequencies (3AP and 7AP) were tested. At the end ofthe vegetative phase of the cycle, inter-season comparisons of the measured parameters showed that, regardless of the treatments applied, the most important number of live leaves and leaf length D were obtained when the plantings were carried out during the long rainy season. The D-leaf masses were above the threshold of 70 g for plantings carried out during the short and long rainy seasons, as well as during the long dry season. The making of ridges allowed the MD2 pineapple plants to have a good vegetative growth during the dry season in the locality of Bonoua.Keywords: Pineapple MD2, growth, leaf D, season, Fertiliser, Côte d’Ivoire.

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