Mulching effects of fresh Sargassum Seaweed on soil properties and plant growth Auteur(s) : Lopez, Francis Année de publication : Loading the player... Éditeur(s) : Université des Antilles. Service commun de la documentation University of West Indies, Barbados Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS Description : Mulch application of Sargassum seaweed (Sargassum spp.) to soil can help to reduce beach contamination in the Caribbean Region while providing beneficial horticultural effects. This study investigated the effects of fresh Sargassum mulch on soil properties and plant growth in a test crop of tomato (Solanum lycopersicum L. â? ? HA 3019â? TM). Fresh Sargassum material (washed and unwashed) was applied as mulches (0, 5 and 8cm thick) to small field plots one week after transplanting of 3-week-old seedlings. The mulch material was raked away from the plots after three weeks exposure. Observations on soil moisture, electrical conductivity, pH and biological activity, and plant growth were made at 1 to 2-week intervals over a 6-week period with additional soil measurements after 10 weeks. Soil biological activity (respiration) was increased by the Sargassum mulch with values being similar for the 5cm and 8cm mulch layers. Soil moisture content, pH and electrical conductivity (EC) were increased as the mulch layer increased and EC values were only marginally reduced by Sargassum washing. An increase in plant growth compared to the control treatment was noted only in the washed Sargassum treatments. Potential benefits of Sargassum seaweed mulches on soil properties and plant growth can be nullified due to soil salinization effects. Siècle(s) traité(s) : 21 Permalien : http://www.manioc.org/fichiers/V16269 | Partager |
Greenhouse evaluation of sagassum seaweed as a potting medium for vegetables Auteur(s) : Bridgemohan, Puran Auteurs secondaires : University of West Indies, Trinidad & Tobago Année de publication : Loading the player... Éditeur(s) : Université des Antilles. Service commun de la documentation Université de Guyane Extrait de : 52e congrès annuel de la Société caribéenne des plantes alimentaires / 52nd annual meeting of the Caribbean food crops society (CFCS), du 10 au 16 juillet 2016. INRA, CFCS Description : The Sargassum seaweed [Sargassum natans and S. fluitans] can be classed as a perennial invasive weed problem in all the Caribbean islands. It has been shown to affect fisher-folks, sea bathers, and tourists. It is proving to be costly to remove; in addition to its offensive odour which hampers the clean-up operations. The University of Trinidad and Tobago at the BAFT campus is engaged in series of activities to find suitable uses of the seaweed as animal feed, and as soil medium and ameliorant. This study aimed at evaluating the suitability of the seaweed as a growing media for the production of sweet peppers [Capsicum annuum var. annuum] using different percentage of the weed (0, 25, 50 and 100%) with soil under greenhouse conditions. The crop growth and development and yield were monitored. The results indicated that the plant height [Y pl ht = 16.6 + 0.3 DAT - 0.11 TRT] and leaf number [Y no.lvs = 0.90 + 1.04 DAT - 0.206 TRT] increased as age of the crop increased, but decreased with the increase in percentage of seaweed/ soil mixture. A similar response was observed for the flower buds and fruits numbers and percentage soil mixture. The medium had no effect on the crop transpiration and net photosynthesis rate [PN] , photosynthesis active radiation[PAR] , and stomatal conductance. A nutrient analysis of the medium was also conducted. Siècle(s) traité(s) : 21 Permalien : http://www.manioc.org/fichiers/V16268 | Partager |
Le changement climatique et biodiversité : constat alarmant aux Petites Antilles et perspectives" Auteur(s) : Lurel, Félix Année de publication : Loading the player... Éditeur(s) : CAGI : Centre d'Analyse Géopolitique et Internationale Extrait de : "Klima en boulvès. Changement climatique : conséquences, causes et alternatives" : conférences, le 18 avril 2015. Université des Antilles et de la Guyane Description : M. Lurel nous présente une étude sur les impacts du changement climatique à travers la faune, la flore, les paysages, les ressources naturelles et alimentaires dans la Caraïbe. Comment s'adapter, anticiper et gérer face ces changements climatiques dans nos territoires insulaires ? Siècle(s) traité(s) : 21 Permalien : http://www.manioc.org/fichiers/V15233 | Partager |
Le changement climatique et son impact en Guadeloupe Auteur(s) : Favand, Guy Année de publication : Loading the player... Éditeur(s) : CAGI : Centre d'Analyse Géopolitique et Internationale Extrait de : "Klima en boulvès. Changement climatique : conséquences, causes et alternatives" : conférences, le 18 avril 2015. Université des Antilles et de la Guyane Description : A l'occasion du "Terra Festival", Guy Favand, expert en énergies renouvelables et maîtrise de l'énergie, nous présente une étude intéressante sur Le changement climatique et son impact en Guadeloupe et dans le monde. Siècle(s) traité(s) : 20 Permalien : http://www.manioc.org/fichiers/V15232 | Partager |