Sihanoukville, Cambodia

University of Battambang

www.ubb.edu.kh
Sihanoukville, Cambodia

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Martin R.,ASR Cambodia Co. | Im S.,Maddox Jolie Pitt Foundation | Phan S.,Maddox Jolie Pitt Foundation | Ly K.,University of Battambang | And 2 more authors.
Archives of Agronomy and Soil Science | Year: 2015

A series of experiments was carried out in 2012–2014 in Pailin province, Cambodia, to determine the potential and agronomic requirements for a dry season sunflower crop. The research showed that the six high-oleic sunflower hybrids evaluated were similar for phenological development and yield but two varieties had <50% emergence and poor hybrid seed quality was seen as a constraint to planting under rainfed conditions. Sunflower receiving a basal application of 20:20:15 (N:P2O5:K2O) at 200 kg ha− 1 produced achene yield of 2423 kg− 1, while side-dressing with urea had no effect on yield. Application of s-metolachlor post-sowing pre-emergence was the most effective weed control treatment and significantly increased sunflower achene yield. Post-emergence weed control was not adequate to prevent yield loss from weed competition. The study showed that sunflower can be grown successfully as a dry season crop in North-West Cambodia when planted no-tillage on residual soil water remaining after maize harvest in October and November. The critical requirements for success are related to preservation and effective use of residual soil water and include minimal soil disturbance, adequate application of fertiliser at sowing, and pre-emergence control of weeds, especially grasses. © 2014, © 2014 Taylor & Francis.


Chea R.,CNRS Biological Evolution and Diversity Laboratory | Chea R.,University of Battambang | Guo C.,CNRS Biological Evolution and Diversity Laboratory | Guo C.,CAS Wuhan Institute of Hydrobiology | And 2 more authors.
Ecological Modelling | Year: 2016

Tonle Sap Great Lake (TSL) is the largest freshwater lake ecosystem in Southeast Asia and receptacle of impressive biodiversity. However, there is surprisingly little knowledge of its ecosystem structure and functioning. The main objective of the current work was to quantify the food web structure and assess the ecosystem health status of the TSL system by constructing the first holistic food web model using Ecopath with Ecosim (EwE). The results indicate that the ecotrophic efficiency (EE) values were very high for most of functional groups (EE. >. 0.5) except molluscs (0.146) and macrophytes (0.102). The high EE values together with the MTI (Mixed Trophic Impact) analysis indicated the overexploitation and degradation of fishery resources in the TSL system. The discrete trophic levels varied from 1 (phytoplankton, macrophytes and detritus) to 3.17 (snakehead). The energy transfer in the TSL food web was based mostly on the detrital food chain (77.9%) rather than the grazing food chain (22.1%), with an average transfer efficiency of 8.27%. The ratios of total primary production to respiration (TPP/TR) and to biomass (TPP/TB) were 1.23 and 2.04, respectively, while the Ascendency and Finn cycling index (FCI) of the system were estimated at 27.4% and 23.62%. Nevertheless, the connectance index (CI: 0.253) and system omnivory index (SOI: 0.075) were in-between compared to other lake ecosystems, which indicated that the food web structure was characterized by linear, rather than web-like features. Systematic analysis and indicators suggested that the ecosystem was a relatively healthy ecosystem achieving a certain stage of maturity, albeit with a vulnerable food web structure. Accordingly, some ecosystem-based strategies are presented for the improvement of fishery management and ecosystem conservation in TSL. © 2015 Elsevier B.V.


Chea R.,University Paul Sabatier | Grenouillet G.,University of Battambang | Lek S.,University Paul Sabatier
PLoS ONE | Year: 2016

To reach a better understanding of the spatial variability of water quality in the Lower Mekong Basin (LMB), the Self-Organizing Map (SOM) was used to classify 117 monitoring sites and hotspots of pollution within the basin identified according to water quality indicators and US-EPA guidelines. Four different clusters were identified based on their similar physicochemical characteristics. The majority of sites in upper (Laos and Thailand) and middle part (Cambodia) of the basin were grouped in two clusters, considered as good quality water with high DO and low nutrient levels. The other two clusters were mostly composed of sites in Mekong delta (Vietnam) and few sites in upstream tributaries (i.e., northwestern Thailand, Tonle Sap Lake, and swamps close to Vientiane), known for moderate to poor quality of water and characterized by high nutrient and dissolved solid levels. Overall, we found that the water in the mainstream was less polluted than its tributaries; eutrophication and salinity could be key factors affecting water quality in LMB. Moreover, the seasonal variation of water quality seemed to be less marked than spatial variation occurring along the longitudinal gradient of Mekong River. Significant degradations were mainly associated with human disturbance and particularly apparent in sites distributed along the man-made canals in Vietnam delta where population growth and agricultural development are intensive. © 2016 Chea et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


University of Battambang | Entity website

Founder The University Of Battambang (UBB) was founded by SAMDACH KROLA HOM SAR KHENG, Deputy Prime Minister, Minister Of Interior, in 2007 with the vision of providing opportunities to students living in rural areas, especially in north-western Cambodia. These opportunities include access to higher education and services that contribute towards the development of their individual careers as well as to that of local communities while at the same time reducing the knowledge gap between the rural and urban population


University of Battambang | Entity website

On Friday, June 17th, 2016 in Workshop. No Comments University of Battambang held a presentation on Food Packing and Safety by Mr ...


University of Battambang | Entity website

On Tuesday, June 21st, 2016 in MOU. No Comments University of Battambang had signed a Memorandum of Agreement (MOA) with KYUSHU University (Japan) ...


University of Battambang | Entity website

VISION University of Battambang is an international standard university in Cambodia. GOAL UBBs goal is to educate the leaders of tomorrow in a wide range of fields through a balance of theory and practice, and the integration of real world experiences into academic education ...


University of Battambang | Entity website

On Thursday, March 31st, 2016 in Cooperation Program, MOU. No Comments University of Battambang would like to express a profound thanks to H ...


University of Battambang | Entity website

On Sunday, June 12th, 2016 in Lecturer Volunteer, Workshop. No Comments University of Battambang would like to express a profound thanks to Prof ...


University of Battambang | Entity website

On Monday, June 20th, 2016 in MOU. No Comments University of Battambang (UBB) had signed Memorandum of Understanding with Asian Network for Public Opinion Research (ANPOR) based in Bangkok, Thailand with the aims to increase collaboration, cooperation and interaction for the further promotion and understanding of public opinion research

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