Jose Maria Ramos Prado - Academia.edu (original) (raw)

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Papers by Jose Maria Ramos Prado

Botanical Sciences

Background: Cocoa is a species commonly cultivated under agroforestry systems (AFs), when microcl... more Background: Cocoa is a species commonly cultivated under agroforestry systems (AFs), when microclimate conditions are adequate, it achieves high growth rates and seed yield. Questions and Hypotheses: How do four cocoa varieties respond to open (OC) and closed (CC) shade tree canopy conditions within AFs? We hypothesized that cocoa functional traits values correlate with microclimate conditions in the CC. Studied species: Theobroma cacao L. (Malvaceae). Study site and dates: Papantla, Nautla, Veracruz; San Pedro, Oaxaca. Rainy season, 2018. Methods: Three AFs were selected; either one with OC and CC zones, photosynthetically active radiation (PAR), vapor pressure deficit (VPD), air temperature (Ta) and relative humidity (RH) were registered. Cocoa tree and leaves functional traits were evaluated in four regional cocoa varieties, in ten individuals per variety, canopy condition and AFs. Results: Higher values of PAR, VPD and Ta, and lower RH were recorded under OC than in CC. Cocoa tr...

Recuperación de la diversidad de semillas locales y su entorno cultural en comunidades rurales, en la búsqueda de sostenibilidad para Iberoamérica, 2018

This study deals with the regeneration processes and the management of tropical moist forests. It... more This study deals with the regeneration processes and the management of tropical moist forests. It is focused on the response to environmental variables of four tree species grown under different light regimes. Growth, photosynthesis and transpiration were analysed. Models of stomatal conductance and photosynthesis were fitted to obtain physiological parameters. These parameters together with environmental data were used as inputs for the simulation model, which predicted the growth of two species under field conditions. Ecophysiological studies and simulation models are discussed in terms of the mechanisms of forest regeneration and management practises. The aims were to present a selected set of data obtained under natural and controlled environment conditions and to integrate such information into a theoretical framework, with which to obtain research priorities and to assess feasibility of management practices, e.g. enrichment planting. The field work is an enrichment planting ex...

Iberoforum Revista De Ciencias Sociales De La Universidad Iberoamericana, 2011

In this study we analyze the productive activities and the current state of knowledge possessed b... more In this study we analyze the productive activities and the current state of knowledge possessed by farmers on the management of the milpa in three communities of the Municipality of Jesus Carranza, Veracruz. The information was obtained through a questionnaire and a semistructured interview of agricultural aspects, in a sample of 30 key informants. The results show that all the people of these communities practice two kinds of milpa: Tapachol milpa is a policulture, sown from November to December in the lowlands near the streams Agosto 2014 Núm. 38: 173-191 and rivers; and Temporal milpa is grown between May and June in the highlands were pastures are also cultivated. The main crop, maize, is represented by fi ve native varieties, 'criollas' and three hybrids; in the Tapachol milpa, they are cultivated with a variety of crops like beans, squash, coriander, manioc, banana, among other; the Temporal milpa is mainly a maiz monocrop where herbicides are commonly used for weeds control. The crops are used mainly for self consumption, sometimes maize and beans are sold in the local market. Also, these crop systems serve as agrodiversity conservation units.

Botanical Sciences, 2015

Although vanilla originated from Mexico and an important pathogen for this plant is Fusarium oxys... more Although vanilla originated from Mexico and an important pathogen for this plant is Fusarium oxysporum f. sp. vanilla, studies concerning their association are limited. Previous reports on agents that cause root and stem rot in vanilla clearly indicate that Fusarium species are associated with this disease. During 2009 and 2010 in Papantla, which is the greatest vanilla-producing region of Mexico, the fungus was isolated from vanilla roots and stems that showed symptoms of the disease. From 189 isolates of Fusarium, 11 morphologically different colonies were selected to verify the species of each colony by microscopic observation of their morphological characteristics when cultivated on SNA and PDA media and by amplifying and sequencing their ITS regions. The detected species corresponded to F. proliferatum, Fusarium sp., F. oxysporum f. sp. vanillae (which was the most numerous and most pathogenic to vanilla stems and leaves), an undetermined species of Fusarium, and F. proliferatum, which showed no evidence of producing disease symptoms.

Society & Natural Resources, 2010

and-conditions-of-access.pdf This article may be used for research, teaching and private study pu... more and-conditions-of-access.pdf This article may be used for research, teaching and private study purposes. Any substantial or systematic reproduction, redistribution , reselling , loan or sub-licensing, systematic supply or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.