Allometric growth relationships of East Africa highland bananas (Musa AAA-EAHB) cv. Kisansa and Mbwazirume
Autor: | P.J.A. van Asten, Ken E. Giller, Kenneth Nyombi, C.K. Kaizzi, Peter A. Leffelaar, Marc Corbeels |
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Přispěvatelé: | Plant Production Systems, Wageningen University and Research [Wageningen] (WUR), International Institute of Tropical Agriculture [Nigeria] (IITA), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), Fonctionnement et conduite des Systèmes de culture Tropicaux et Méditerranéens, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Research Institute |
Jazyk: | angličtina |
Rok vydání: | 2009 |
Předmět: |
0106 biological sciences
Irrigation leaf area [SDV]Life Sciences [q-bio] radiation interception F62 - Physiologie végétale - Croissance et développement interception 01 natural sciences biomass accumulation Crop girth F01 - Culture des plantes Musa acuminata Botany morphology Dry matter crop diameter 2. Zero hunger biology biomass Phenology Crop yield Musa 04 agricultural and veterinary sciences 15. Life on land biology.organism_classification PE&RC fertilizer Musaceae radiation Horticulture Plant Production Systems Plantaardige Productiesystemen [SDE]Environmental Sciences leaf-area estimation 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Allometry light Agronomy and Crop Science 010606 plant biology & botany height |
Zdroj: | Annals of Applied Biology Annals of Applied Biology, Wiley, 2009, 155 (3), pp.403-418. ⟨10.1111/j.1744-7348.2009.00353.x⟩ Annals of Applied Biology, 155(3), 403-418 Annals of Applied Biology 155 (2009) 3 |
ISSN: | 0003-4746 1744-7348 |
Popis: | International audience; Highland bananas are an important staple food in East Africa, but there is little information on their physiology and growth patterns. This makes it difficult to identify opportunities for yield improvement. We studied allometric relationships by evaluating different phenological stages of highland banana growth for use in growth assessment, understanding banana crop physiology and yield prediction. Pared corms of uniform size (cv. Kisansa) were planted in a pest-free field in Kawanda (central Uganda), supplied with fertilizers and irrigated during dry periods. In addition, tissue-cultured plants (cv. Kisansa) were planted in an adjacent field and in Ntungamo (southwest Uganda), with various nutrient addition treatments (of N, P, K, Mg, S, Zn, B and Mo). Plant height, girth at base, number of functional leaves and phenological stages were monitoredmonthly. Destructive sampling allowed derivation of allometric relationships to describe leaf area and biomass distribution in plants throughout the growth cycle. Individual leaf area was estimated as LA (m2) = length (m) × maximum lamina width (m) × 0.68. Total plant leaf area (TLA) was estimated as the product of the measured middle leaf area (MLA) and the number of functional leaves. MLA was estimated as MLA (m2) = −0.404 + 0.381 height (m) + 0.411 girth (m). A light extinction coefficient (k = 0.7) was estimated from photosynthetically active radiationmeasurements in a 1.0 m grid over the entire day. The dominant dry matter (DM) sinks changed from leaves at 1118 ◦C days (47% of DM) and 1518 ◦C days (46% of DM), to the stem at 2125 ◦C days (43% of DM) and 3383 ◦C days (58% of DM), and finally to the bunch at harvest (4326 ◦C days) with 53% of DM. The allometric relationship between aboveground biomass (AGB in kg DM) and girth (cm) during the vegetative phase followed a power function, AGB = 0.0001 (girth)2.35 (R2 = 0.99), but followed exponential functions at flowering, AGB = 0.325 e0.036(girth) (R2 = 0.79) and at harvest, AGB = 0.069 e0.068(girth) (R2 = 0.96). Girth at flowering was a good parameter for predicting yields with R2 = 0.7 (cv. Mbwazirume) and R2 = 0.57 (cv. Kisansa) obtained between actual and predicted bunch weights. This article shows that allometric relationship can be derived and used to assess biomass production and for developing banana growth models, which can help breeders and agronomists to further exploit the crop’s potential. |
Databáze: | OpenAIRE |
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