Khoa le vanCan Tho University · Research affairs
Khoa le van
PhD
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23
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Introduction
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Publications
Publications (23)
Mục tiêu nghiên cứu nhằm xác định các tầng chẩn đoán đặc tính chẩn đoán và vật liệu chẩn đoán qua đó thành lập bản đồ đất tỉnh An Giang. Nghiên cứu đã sử dụng các các phương pháp như thu thập số liệu, điều tra khảo sát thực địa, lấy mẫu phân tích mẫu đất, phân loại đất và hệ thống thông tin địa lý (GIS). Kết quả đã xác định được ở An Giang 4 tầng c...
Nghiên cứu này nhằm đánh giá tiềm năng đất đai, các trở ngại cho sản xuất đáp ứng nhu cầu kinh tế cũng như đa dạng hóa các loại mô hình cây trồng của tỉnh Vĩnh Long thuộc vùng ĐBSCL. Qua đó việc xác định các trở ngại chính của đất là cơ sở để bố trí đất hợp lý, đề xuất các biện pháp nhằm duy trì và cải thiện các đặc tính đất phù hợp với từng loại c...
Mekong Delta is one of the largest agricultural production areas in Vietnam. However, in recent years, the intensification of crops and the overexploitation of the land potential led to the soil degradation. Therefore, it is necessary to build soil fertility maps in order to have reasonable land use and exploitation measures. In addition, with the...
Although a great number of studies have been devoted to develop and evaluate pedotransfer functions (PTFs), several questions still are to be addressed, particularly pertaining to tropical delta soils which received very little attention. One such question relates to the optimal structural dependency between basic soil properties and soil water ret...
Spatial variability of hydro-physical properties has long been observed, whereas temporal variation is much less documented and considered in studies and applications, particularly of paddy clay soils under different cropping systems. The objective of this study was therefore to assess the seasonal-and inter-seasonal variation of selected hydro-phy...
In tropical deltas, intensive monoculture with three rice crops per year (RRR) has been the standard for decades. However, in recent years some farmers have started rice-based rotations with one or more upland crops per year. The trends for increased grain yields with this new system raises the question as to whether the introduction of upland crop...
In the Mekong Delta, alluvial clay soils have been used intensively over many generations for rice monoculture. Currently, farmers are confronted by problems of declining land productivity. Rotations comprising rice and upland crops can increase soil quality, but appropriate cropping systems for paddy soils have received relatively little attention...
Soil hydraulic properties (e.g. soil water retention and hydraulic conductivity) are very important for agricultural and environmental management practices. However, the direct field or laboratory measurement of these characteristics is costly, laborious and time-consuming. Therefore, their indirect estimation from available and easily measured soi...
International Conference on Green Technology and Sustainable Development (GTSD) is a series of conferences initiated and coordinated by a team of engineering and technology educators and experts from around the globe which transformed to an open, collegial and supportive working group. GTSD involves multiple likeminded universities and organization...
Cropping systems are thought to alter soil quality in paddy rice fields. This study was conducted to quantify the long-term effects of continuous crop production under different cropping systems with different crop rotations on physical properties of alluvial clay soil in the Mekong Delta, Vietnam. Soil samples were collected from four treatments:...
Models of soil water and solute transport require input data of soil hydraulic properties (e. g. soil water retention and hydraulic conductivity curves). Lack of such data, especially in tropical delta regions, has usually been the main constraint for the application of simulation models. Direct field or laboratory measurement of soil water retenti...
Nghiên cứu nhằm đánh giá khả năng cải thiện đặc tính đất phèn, tăng độ phì cho đất và năng suất lúa điều kiện nhà lưới. Thí nghiệm được thực hiện ở vụ DX 2012-2013 tại nhà lưới ĐHCT. Sử dụng giống lúa Núi Voi 1 (NV1), được trồng trên đất phèn nặng Epi Orthi Thionic Gleysols (Hòa An, Hậu Giang). Phân sỉ thép được tính toán trên cơ sở khả năng trung...
Declining land productivity is a major problem faced by small holder farmers in the Mekong Delta today. Low soil quality is one of the greatest long-term challenges for farmers in rice monocultures on alluvial soil. In order to better understand how farm characteristics and crop rotations affect crop yield and income, a socio-economic evaluation am...
Nhằm mục đích giúp cho sinh viên, các cán bộ nghiên cứu có liên quan có thể hiểu và ứng dụng tài nguyên đất đai để khai thác, quản lý nguồn tài nguyên một cách có hiệu quả. Nhất là các cán bộ chuyên ngành quản lý, khai thác, sử dụng, quy hoạch tài nguyên đất đai, khoáng sản. Giáo trình gồm các nội dung: giới thiệu các khái niệm về đất, đất đai, tài...
Projects
Projects (5)
Develop a method for visual rice and fruit garden soil identification and assessment
1. Evaluation of the current status of crop growth and soil fertility degradation in the study area
2. Soil Fertility Capability Classification and recommendation for sustainable uses
3. Recommendation and demonstration of the promising agricultural models
Albeit the increased use of mineral fertilizer and improved cultivars, rice productivity is gradually declining in the Vietnamese Mekong delta. The project aims at increasing crop production by introducing soil-improving cropping systems, while reducing inputs like water and fertilizer, and greenhouse gas emissions. Cropping systems in which rice is rotated with upland crops like maize, soybean and sesame within one year instead of rice monocultures with three rice crops per year, and soil is amended with organic waste materials like compost and rice-husk based biochar will be evaluated on farm. Specific attention is given to soil health, water balance, crop growth, economic profitability and greenhouse gas emissions. Meanwhile, the capacity of Can Tho University staff regarding teaching and research will be enhanced.
