Impact des légumineuses fourragères et/ou de couverture sur la biodiversité floristique au Nord-Cameroun.

Une étude synchronique a été menée dans un dispositif expérimental mis en place en juin 1994 en zone soudano-sahélienne du Cameroun et comprenant quatre types de jachères améliorées avec des légumineuses à usages multiples. Initialement conçu pour mesurer l'impact de la coupe et de la pâture sur le rendement grainier de Calopogonium mucunoides, Stylosanthes hamata, et Cajanus cajan, ce dispositif a été laissé en jachère de 1995 à mai 2000. L'évolution de la flore et de la production de biomasse herbacée 6 ans après abandon ont été étudiées en utilisant la méthode phytosociologique sigmatiste et l'analyse structurale par la méthode des points quadrats. L'analyse de la production de biomasse a été faite par la méthode des coupes totales. Les résultats obtenus montrent que les légumineuses utilisées permettent une augmentation significative de la biomasse herbacée des jachères. Par leur aptitude à coloniser rapidement l'espace, elles concourent à l'appauvrissement de la biodiversité floristique. Ce caractère nettoyant peut être utilisé pour lutter contre la persistance des adventices dans les parcelles agricoles. La litière accumulée est plus importante dans les jachères à Calopogonium mucunoides, et dans celles ayant comme antécédent l'association Cajanus cajan / Zea mays. Des analyses ultérieures permettront de mettre en évidence l'impact de ces légumineuses sur la fertilité des sols de la région.International Journal of Biological & Chemical Sciences Vol. 1 (2) 2007: pp. 165-17

Leaf mineral composition of grafted eggplant grown in soil infested with Verticillium and root-knot nematodes

WOS: 000282876200014The objective of this work was to determine differences in leaf mineral composition between ungrafted and grafted onto (Solanum torvum) eggplant (Solanum melongena), cultivars 'Faselis' and 'Pala', grown in a soil infested with Verticillium dahliae and Meloidogyne incognita, or in a noninfested soil. Grafting increased leaf P and Mn concentrations, and decreased N concentrations, in both soils. Grafting also enhanced leaf Ca concentration of 'Pala', but it did not affect that of 'Faselis' depending on the cropping year. Leaf Mg concentration of grafted plants in infested soil was lower than that of ungrafted ones in noninfested soil. Results showed that, under the same fertilization program, the grafted 'Faselis' plants used the nutrients more efficiently than the 'Pala' ones. Use of S. torvum as a rootstock for 'Faselis' resulted in an effective protection against multiple pathogen infestation. Fertilization may be necessary when grafted 'Faselis' plants are grown in a soil infested with the pathogens, since grafting and infestation generally decrease leaf N, Mg, Ca and Fe concentrations, either by reducing the nutrient concentrations directly or by increasing leaf Mn concentration.Mustafa Kemal UniversityMustafa Kemal UniversityTo Mustafa Kemal University, for funding the project; and to Dr. Mehmet Arslan, for reviewing the earlier version of the manuscript

Wild Meat Is Still on the Menu: Progress in Wild Meat Research, Policy, and Practice from 2002 to 2020

Several hundred species are hunted for wild meat in the tropics, supporting the diets, customs, and livelihoods of millions of people. However, unsustainable hunting is one of the most urgent threats to wildlife and ecosystems worldwide and has serious ramifications for people whose subsistence and income are tied to wild meat. Over the past 18 years, although research efforts have increased, scientific knowledge has largely not translated into action. One major barrier to progress has been insufficient monitoring and evaluation, meaning that the effectiveness of interventions cannot be ascertained. Emerging issues include the difficulty of designing regulatory frameworks that disentangle the different purposes of hunting, the large scale of urban consumption, and the implications of wild meat consumption for human health. To address these intractable challenges, we propose eight new recommendations for research and action for sustainable wild meat use, which would support the achievement of the United Nations Sustainable Development Goals

Wild Meat Is Still on the Menu: Progress in Wild Meat Research, Policy, and Practice from 2002 to 2020

Several hundred species are hunted for wild meat in the tropics, supporting the diets, customs, and livelihoods of millions of people. However, unsustainable hunting is one of the most urgent threats to wildlife and ecosystems worldwide and has serious ramifications for people whose subsistence and income are tied to wild meat. Over the past 18 years, although research efforts have increased, scientific knowledge has largely not translated into action. One major barrier to progress has been insufficient monitoring and evaluation, meaning that the effectiveness of interventions cannot be ascertained. Emerging issues include the difficulty of designing regulatory frameworks that disentangle the different purposes of hunting, the large scale of urban consumption, and the implications of wild meat consumption for human health. To address these intractable challenges, we propose eight new recommendations for research and action for sustainable wild meat use, which would support the achievement of the United Nations Sustainable Development Goals