DISSERTATION LE CACAO EN COTE DIVOIRE

Given that certification often involves added costs, with varied price premiums, cost-benefit analyses are critical. This group is comprised of varieties that produce fruits pods with thick, white or pinkish seeds that yield more flavored seeds and fine chocolates Marita et al. As an example, Malaysia has replaced cacao plantations with oil palm, and Indonesia has become less and less interested in producing cacao. Seedlings grow slowly under full sunlight and some degree of shade is beneficial for their establishment Okali and Owusu, This is essential for the survival and the establishment of cacao seedlings in dry and seasonally humid environments Beer, since they are highly susceptible to dehydration Leite et al. The cacao yield is strongly related to rainfall in the dry season.

However, with expansion F-2 stage the stem: Productivity indices, organic material models and sustainability over ten years. Factors like soil water deficit and leaf respiration, due to high air temperature and high radiation, can be causes for the intensive leaf fall in the middle and upper canopy layers of the cacao crown Alvim and Alvim, Studies done under greenhouse conditions have shown that cacao seedlings, as for many tropical woody species, have alternative phases of root and shoot growth Taylor and Hadley, This position is maintained for the rest of the leaf’s life Abo-Hamed et al.

dissertation le cacao en cote divoire

Up to the coet that the leaf blade becomes completely green, it thickens and becomes rigid with a pronounced cuticle, and both the stem: Contrary to Soria and Garcia and NicolellaBatista and Alvim verified that the genetic background of orthotropic growth is influenced by environmental factors.

Services on Demand Journal. Flower abscission due to pollination begins well before the pollinic tube reaches the ovules Aneja et al. Orchard showed in cacao seedlings that high doses of K 5 mmol L -1 promoted increases in leaf area without affecting dry biomass production.

Cocoa and Development in Cote D’Ivoire

With shade management practices cacao production can increase during the first decade and thereafter stabilizes Rosenberg and Marcotte, Shading also helps to reduce effects of unfavorable ecological factors, such as low soil fertility, wind velocity and excessive evapotranspiration Miyaji et al. This formation of ABA after stage F-2 could be the result of water stress created by leaf transpiration exceeding the capacity of water uptake.

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Low temperatures affect mainly vegetative growth Alvim et al. Daymond AJ An investigation into physiological parameters underlying yield variation between different varieties of cocoa Theobroma cacao L. Therefore, the absence of flushing and flowering in south Bahia is intimately related to the decrease of fruiting, culminating with an almost total absence of pods in January to March of the following year Leite and Valle, However, it is conceivable that high auxin levels also override the abscission signal, affecting or controlling the auto-incompatibility response in Theobroma Hasenstein and Zavada, In this case, the role of ABA seems to be in maintaining rather than initiating apical bud quiescence Abo-Hamed et al.

Sale PJM Growth, flowering, and fruiting of cacao under controlled soil moisture conditions.

Incompatibility in cacao was first reported by Poundwho verified the occurrence of changes from self-incompatibility to self-compatibility during certain periods of the year. Unpublished results of an experiment conducted in a semi-arid region of Bahia, Brazil, in which irrigation was performed by placing one or two plastic pipes at 0.

Actually, the chocolate industry foresees difficulties about future supplies. To find out more, including how to control cookies, see here: Also, these authors reported a high level of autopollination in auto-incompatible trees of some genotypes.

The fact that GA 3 applied to NF leaves in the F-2 stage does not promote a reduction effect on the duration of the apex dormancy period reinforces the hypothesis that the apical dominance, at this stage, is due to competition by nutrients instead of the presence of hormonal inhibitors in the leaves Abo-Hamed et al.

The fluctuation of the water table can be considered a climatic variable derived from rainfall that can influence cacao production as a form of natural sub-irrigation Leite and Valle, According oe Alvimin most cacao producing areas leaf emission begins following the first rains after a dry period. Email required Address never made public.

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Cacao: La Côte d’Ivoire adopte le système de commercialisation du Ghana

This decline was attributed to an increase in N mobilization to expanding leaves. For the conditions of Bahia the PDD that better explained flushing was the one calculated three weeks before leaf emission. In Bahia, the main flushing period is from September to February, with alternation of short periods of vegetative rest; along those months, the energy curve averages day -1 is in ascension and cacaao with the period of more intense flushing Almeida et al.

This period is characterized by relatively low temperatures. Several factors influence leaf dynamics rates of production and abscissionamong them water and light availability, which largely vary between locations and cropping systems Zuidema et al.

Le cacao en Côte d’Ivoire : étude de géographie régionale – Persée

In contrast, shaded leaves show higher relative water content and fewer stomata per unit leaf area than unshaded leaves. During this period, leaf levels of fructose, glucose and sucrose increase, presumably due to imports from older leaves. All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License.

Heavy shade not only reduces seed yield Zuidema et al. Since flower production represents a considerable plant investment Valle et al. Under dissertatkon conditions cacao trees well supplied with K may be more tolerant to the adverse effects of water stress Bosshart and Divlire, She answers to the question of a potential rise again of the price.

dissertation le cacao en cote divoire