A5012175316- Soil Carbon and Nitrogen Dynamics
- Legume Nitrogen Fixing Symbiosis
- Cassava research and cyanide
- Plant nutrient uptake and metabolism
- Agronomic Practices and Intercropping Systems
- Banana Cultivation and Research
- Spectroscopy and Chemometric Analyses
- Soil Management and Crop Yield
- Soil and Water Nutrient Dynamics
- Food composition and properties
- Agriculture and Rural Development Research
- Agroforestry and silvopastoral systems
- Agriculture, Land Use, Rural Development
- Oil Palm Production and Sustainability
- Plant and animal studies
- Agriculture, Soil, Plant Science
- Microbial Metabolites in Food Biotechnology
- Geological and Geophysical Studies Worldwide
- Potato Plant Research
- Meat and Animal Product Quality
- Composting and Vermicomposting Techniques
- Medicinal Plants and Neuroprotection
- Pineapple and bromelain studies
- Agriculture Sustainability and Environmental Impact
- Smart Agriculture and AI
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
1996-2023
Unité de Recherche Agrosystèmes tropicaux
2010-2023
Institut National de la Recherche Agronomique
1995-2015
Institut Pasteur de la Guadeloupe
2001
Université des Antilles
2000
Centre National de la Recherche Scientifique
1996
Biologie Tissulaire et Ingénierie Thérapeutique
1990
Laboratoire de Biochimie
1990
Composting and vermicomposting are interesting options for utilisation in restoration improvement of weathered infertile tropical soils. The aim this study was to assess quality composts vermicomposts produced from cattle manure (CM) green wastes (GW) blended at different ratios under conditions. Chemical, biochemical, biological indicators were used identify the role earthworms factors affecting organic matter (OM) stability nutrient balance thermophilic (days 0–65) stabilisation 66–183)...
Yam (Dioscorea alata L.) is the staple food of many populations in intertropical zone, where it grown. The lack phenotyping methods for tuber quality has hindered adoption new genotypes from breeding programs. Recently, near-infrared spectroscopy (NIRS) been used as a reliable tool to characterize chemical composition yam tuber. However, failed predict amylose content, although this trait strongly involved product.
Laboratory incubations and a field experiment were carried out to determine the factors controlling N mineralization nitrification, estimate losses (leaching volatilization) in sewage-sludge-amended Oxisol. Aerobically digested sludge was applied at rate equivalent 625 kg N/ha. The conducted as factorial of temperature (20˚C, 30˚C, 40˚C) soil water (–30 kPa –1500 kPa) type [fresh (FS) content 6230 g/kg; dry (DS) 50 g/kg]. amount nitrifiers determined beginning end experiment. incubation...
Developing climate-smart agriculture is an urgent necessity to ensure the food security of a growing global population, improve adaptation agricultural systems climatic hazards, and reach negative carbon balance. Different approaches are being explored achieve those objectives, including development new technologies for efficiency improvements current substitution chemical inputs by bio-inputs, but urgency climatic, social, environmental context calls more disruptive actions be taken. We...
Despite the importance of yam ( Dioscorea spp.) tuber quality traits, and more precisely texture attributes, high-throughput screening methods for varietal selection are still lacking. This study sets out to define profile good pounded provide tools based on predictive models using near infrared reflectance spectroscopy. Seventy-four 216 studied samples proved be moldable, i.e. suitable yam. While with low dry matter (<25%), high sugar (>4%) protein (>6%) contents, hardness (<5...
Journal Article Acromyrmex octospinosus (Hymenoptera: Formicidae) Management: Effects of TRAMILs Fungicidal Plant Extracts Get access Isabelle Boulogne, Boulogne 1Université des Antilles et de la Guyane, UFR Sciences Exactes Naturelles, Campus Fouillole, 97157 Pointe-à-Pitre Cedex, Guadeloupe. 4Corresponding author, e-mail: isabelle.boulogne@univ-ag.fr. Search for other works by this author on: Oxford Academic PubMed Google Scholar Harry Ozier-Lafontaine, Ozier-Lafontaine 2INRA, UR1321,...
Tropical tree fodder is harvested by frequent prunings, and resprouting depends on nonstructural carbohydrate reserves in the remaining parts. We studied effects of three pruning intensities (removal all leaves branches leaving 1 m stem once a year (T-12), or every 6 months (T-6), about 50% 2 (P-2)) regrowth dynamics soluble sugars starch legume Gliricidia sepium (Jacq.) Walp. growing under humid tropical conditions Guadeloupe, Lesser Antilles. Carbohydrates were sampled roots, stems...
Jackbean is an annual legume frequently used as green manure in tropical intercropping systems with bananas. Although the beneficial effect of nitrogen (N) release from above-ground residues on banana nutrition well known, little information available N transfer jackbean roots before and after harvest. The aim this study was to assess relative contribution exudates root turnover a greenhouse experiment. Nitrogen studied 6-month trial using 15N leaf feeding method, estimated box model...
Effects of four N sources and two defoliation treatments on growth nitrogenase activity Gliricidia sepium (Jacq.) Walp seedlings were studied in a greenhouse. All nutrients supplied irrigation water to the sterile growing medium. The were: (1) 100 mg l−1 as NO3− (high-NO3−), (2) 50 inoculation with Rhizobium spp. medium-NO3−), (3)100 NH4NO3, (4) spp without mineral (N2). At 35 weeks after sowing, mean total biomass was 130.5, 50.5, 22.9 17.4 g seedling−1 N2, medium-NO3− high-NO3− treatments,...
Roots, tubers and bananas (RTB) play an essential role as staple foods, particularly in Africa. Consumer acceptance for RTB products relies strongly on the functional properties of, which may be affected by size shape of its granules. Classically, these are characterized either using manual measurements microscopic photographs starch colored with iodine, or a laser light-scattering granulometer (LLSG). While former is tedious only allows analysis small number granules, latter provides...
Nitrogen-15 (15N) fractionation during N mineralisation is frequently invoked to interpret data of cycling in N-isotope-based ecosystem studies. Because direct measurement actual (Dact) difficult perform, it currently estimated from laboratory or field incubation experiments (apparent fractionation, Dapp). However, the procedure calculation may induce bias estimations due several factors controlled by litter inputs. The objective this study was assess effects inputs and size 15N content...
Soil organic matter (SOM) quality and carbon (C) availability may be major features influencing the effect of earthworms on aerobic processes in clayey tropical soils. In this study, we assessed an anecic (Polypheretima elongata), endogeic (Pontoscolex corethrurus) epigeic (Eudrilus eugeniae) earthworm microbial activity two soils, a calcic Vertisol acid Ferralsol, with clay content >70% very different C SOM stability. The soil–earthworm interaction was studied 6-month mesocosm experiment...
There is a growing demand for molecules of natural origin biocontrol and biostimulation, given the current trend away from synthetic chemical products. Leachates extracted plantain stems were obtained after biodegradation plant material. To characterize leachate, quantitative determinations nitrogen, carbon, phosphorus, cations (K
After isolation, purification, and radiolabeling of elastin from baboon aorta lung, the rates hydrolysis both 3H-labeled elastins by porcine pancreatic elastase (PPE or human leukocyte (HLE) were compared. PPE (30 nM) degraded lung at 40 75 micrograms/h, respectively, leading to their complete solubilization. In contrast, low rate (10 micrograms/h) HLE was paradoxically accompanied with a fivefold decrease in Michaelis constant value became negligible after 1 h incubation. Moreover,...
The distribution of 14 C products in yam bean ( Pachyrhizus erosus ) plants was measured as a function time after CO 2 pulse‐chase experiment under short‐day conditions. declined by more than 70% leaves during the first two hours, indicating that they actively exported carbon. Tubers were strong storage sinks for carbon and accumulated 80% total incorporated 72‐h chase. data show that, although sucrose represented about 21% tuber non‐structural carbohydate, i.e. 15% dry weight, did not...
Elastin was purified from baboon aorta using Achromobacter collagenase and its susceptibility to proteolysis by various enzymes studied. Human leukocyte elastase (HLE) hydrolysed aortic elastin 8 times faster than human cathepsin G. Bovine chymotrypsin had virtually no activity against this substrate. The kinetic constants V [S50] of hydrolysis HLE (0.15 microM) were 0.00286 mg x ml-1 min-1 0.158 ml-1, respectively. One could be saturated with 5.6 micrograms HLE. As elastins isolated other...