Effect of potassium on growth, yield and quality of pineapple in tropical peat

Abstract

Effect of potassium on growth, yield and quality of pineapple in tropical peat.Abstract -Introduction. Two field experiments were conducted to investigate the effects of potassium (K) on plant growth, fruit yield and quality of pineapple cultivated on tropical peat soil. Materials and methods. Six levels of K: 0, 266, 532, 798, 1064 and 1330 kg . ha -1 K 2 O were applied at each of two pineapple plantations located at two different sites. The experiments were conducted with the Gandul cv. in a randomized complete block design with three replications. Results and discussion. The application of K had not any significant effect on plant height and leaf number of pineapple at both sites. Potassium significantly influenced the fruit diameter at site 1, and fruit length and fruit weight at site 2. The application of 266 kg . ha -1 K 2 O resulted in the highest fruit weight and, at site 2, further increase of K declined it. Potassium had no significant effect on fruit sugar and acidity. However, at site 2, acid content tended to increase with increased K applications. Conclusion. Potassium applications at high rates tended to depress most of the growth and yield attributes of cv. Gandul pineapple cultivated on peat soil in Malaysia.Malaysia / Ananas comosus / potassium / growth / yields / quality / peat Effet du potassium sur la croissance, le rendement et la qualité de l'ananas cultivé sur de la tourbe en zone tropicale.Résumé -Introduction. Une expérimentation a été conduite en champ pour étudier les effets du potassium (k) sur la croissance de plantes, ainsi que sur le rendement et la qualité du fruit de l'ananas cultivé sur de la tourbe en zone tropicale. Matériel et méthodes. Six doses de K (0, 266, 532, 798, 1064 et 1330 kg . ha -1 K 2 O) ont été appliquées à chacune de deux plantations de cv. Gandul localisées sur deux sites différents. Les dispositifs expérimen-taux ont été ceux de blocs en randomisation complète avec trois répétitions. Résultats et discussion. Quel que soit le site, l'application de K n'a eu aucun effet significatif sur la hauteur de la plante et son nombre de feuilles. Le potassium a influencé de manière significative le diamètre de fruit au site 1 et la longueur du fruit et son poids au site 2. L'application de 266 kg . ha -1 K 2 O a permis d'obtenir le poids de fruit le plus élevé et, au site 2, des doses supé-rieures de K l'ont diminué. Le potassium n'a eu aucun effet significatif sur le sucre et l'acidité du fruit. Cependant, au site 2, la teneur en acide a eu tendance à augmenter avec des applications accrues de K. Conclusion. Les applications de potassium à fortes doses ont tendu à diminuer la plupart des caractéristiques de croissance et de rendement des ananas Gandul cultivés sur sol tourbeux en Malaisie.Malaisie / Ananas comosus / potassium / croissance / rendement / qualité / tourbe Effect of potassium on pineapple 45

Effects of Application of N, P And K Alone Or In Combination on Growth, Yield And Curcumin Content of Turmeric(Curcuma LongaL.)

“…Similarly, Behura (2001) and Govind et al (1990) reported that P or K applied alone could not increase vegetative growth of turmeric. Other studies also reported that vegetative growth responses to P or K are not significant (Maier et al, 1996;Razzaque and Hanafi, 2001). The combined application of P and K showed antagonistic effects on vegetative growth.…”

“…It was assumed that PK without N created a nutrient imbalance in the plants or formed toxic ions. Other studies reported that imbalance of nutrients could not increase growth and yield of crops (Maier et al, 1994;Razzaque and Hanafi, 2001;Hossain and Ishimine, 2005). It is assumed that the amount of nutrient is not the only factor for better growth and yield; imbalance of nutrients interfere with normal function, which ultimately results in a lower growth and yield of turmeric.…”

Adubação N-P-K e o desenvolvimento, produtividade e qualidade dos frutos do abacaxi 'gold' (MD-2)

“…O N e o K são os nutrientes responsáveis pelo maior crescimento do fruto de abacaxi (Quadro 4), como atestam os trabalhos de Bhugaloo (1998), Veloso et al (2001), Razzaque & Hanafi (2001) e Spironello et al (2004). Entretanto, o efeito da adubação nitrogenada no crescimento do fruto foi mais pronunciado do que o efeito da adubação potássica, o que é evidenciado pelos coeficientes das equações de regressão selecionadas para as variáveis de desenvolvimento do fruto estudadas (Quadro 4), sendo esse resultado corroborado pelo trabalho de Spironello et al (2004).…”

Growth and production of irrigated vitória pineapple grown in semi-arid conditions

“…The positive and significant correlations observed for all characteristics analyzed, suggest that D-leaf fresh mass, D-leaf length, stem diameter, and plant height may be used as estimators of total biomass production and fruit yield. In fact, plants with higher biomass production produce proportionally heavier fruits (HANAFI and HALIMAH, 2004;HANAFI et al, 2009;RODRIGUES et al, 2010;GUARÇONI and VENTURA, 2011;RAZZAQUE and HANAFI, 2011). TABLE 3-Fresh and dry matter production of different plant parts (leaves, stem, root, seedlings, fruit with crown) and vegetative (total leaves + stem + root) and total biomass production at the end of the cultivation cycle of Vitória pineapple plants.…”