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Mulching type-induced soil moisture and temperature regimes and water use efficiency of soybean under rain-fed condition in central Japan

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International Soil and Water Conservation Research 2017年第4期5卷 302-308页

作者： mohammad abdul Kader Masateru Senge mohammad abdul mojid Kimihito Nakamura Rural Development Academy(RDA) Bogra-5842Bangladesh Faculty of Applied Biological Sciences Gifu University1-1 YanagidoGifu City 501-1112Japan Department of Irrigation and Water Management Bangladesh Agricultural UniversityMymensingh-2202Bangladesh Graduate School of Agriculture Kyoto UniversityKitashirakawa Oiwake-choSakyo WardKyoto 606-8502Japan

Soybean(Glycine max)is a high water-demand crop and grown under moderate temperature in *** protect the crop from hot summer and to utilize rainfall for its cultivation,selection of appropriate mulching material(s)is *** optimum production of the crop,soil moisture and temperature regimes as well as water use efficiency(WUE)of the crop were investigated under straw,grass,paper,plastic and bare soil(control)mulching under rain-fed condition at Gifu university farm in *** mulching treatments,compared to the control,lowered soil temperature by 2°C at 5 cm depth and 0.5°C at 15 and 25 cm *** plastic and straw mulching stored the highest quantity of soil moisture at 5 and 15 cm depths;the bare soil stored the lowest *** 25 cm depth,soil-moisture content was the highest under paper mulch but invariable under the other *** mulching reduced evaporation rate from the soil surface and,consequently,the reduced soil-water consumption(SWC)from the root zone augmented WUE of *** paper mulching,by conserving soil-moisture and reducing soil temperature,provided better crop growth attributes,while the plastic mulching improved WUE of green ***,the plastic mulch performed best in reducing soil-water consumption and increasing WUE,while the paper mulch was good for soil-moisture conservation and temperature modification that increased soybean yield.

关键词： Mulching Soil-water consumption Soil temperature Water use efficiency

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Climate change impact assessment on three major crops in the north-central region of Bangladesh using DSSAT

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International Journal of Agricultural and Biological Engineering 2018年第4期11卷 135-143页

作者： Atikur Rahman mohammad abdul mojid Selina Banu Department of Irrigation and Water Management Bangladesh Agricultural UniversityMymensingh-2202Bangladesh Department of Agricultural and Industrial Engineering Hajee Mohammad Danesh Science and Technology UniversityDinajpur-5200Bangladesh

The potential consequences of climate change emanated from global warming are very alarming;the greatest concern is the potentially disastrous consequences on crop agriculture and food security in many parts of the *** is a country highly susceptible to climate change,but information in this regard is still *** study investigated the effects of climate change on three major crops-wheat,potato and rice-in the north-central region of *** climate change scenarios,A2 and B2,of the Intergovernmental Panel on Climate Change(IPCC)were generated by employing MAGICC/SCENGEN model together with the observed climate data of the *** growth and yield of the crops were simulated using DSSAT CERES-Wheat,SUBSTOR-Potato and CERES-Rice models under the present and projected future changing climatic *** a predicted 5.32℃ increase in temperature in the year 2100,the yield of wheat,rice and potato would decrease by 47.6%,67.8%and 38.6%,*** increased temperature would accelerate physiological maturity of the crops as reflected by their reduced length of growing season(LGS)by 1.20%to 18.5%.The reduced LGS would reduce seasonal evapotranspiration(ET)of the crops by shortening time-span for ET *** to dominant yield reduction over ET reduction,the water use efficiency(WUE)for grain/tuber and biomass yields would decrease with the changing *** reduced crop yields are an indicative of a potential future risk of food security in *** results of this study can therefore guide to adopt coping mechanisms in the light of climate change to ensure future food security of the country.

关键词： climate change DSSAT MAGICC/SCENGEN model CERES model SUBSTOR model growing season length crop-water use

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Optimization of equitable irrigation water delivery for a large-scale rice irrigation scheme

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International Journal of Agricultural and Biological Engineering 2018年第5期11卷 160-166页

作者： Md Rowshon Kamal Muhammad Iqbal Md abdul mojid Mohd Amin Mohd Soom Lai Sai Hin Department of Biological and Agricultural Engineering Faculty of EngineeringUniversiti Putra Malaysia(UPM)UPM Serdang 43400Selangor DEMalaysia Department of Agricultural Engineering and Technology Faculty of Agricultural SciencesGhazi UniversityDera Ghazi KhanPakistan Department of Irrigation and Water Management Faculty of Agricultural Engineering and TechnologyBangladesh Agricultural UniversityMymensingh 2202Bangladesh Faculty of Sustainable Agriculture Universiti Malaysia Sabah(UMS)Jalan UMSKota Kinabalu 88400SabahMalaysia Department of Civil Engineering Faculty of EngineeringUniversity of MalayaKuala Lumpur 50603Malaysia

Equitable water allocation is essential in an irrigation scheme for obtaining potential crop yields from the entire scheme,especially when water supply is *** optimization model achieved this goal by coupling an optimal water allocation model with available water supply and irrigation water demand for a river-fed rice irrigation system in *** model consists of a paddy field water balance module and an optimization *** outputs from the module are daily irrigation demand and surface runoff,if there is *** optimization module consists of an objective function,which minimizes water shortage across the scheme area while maintaining equity in water *** model performs optimization subject to several system constraints,and the decision variable of the model is daily releases or supply to the tertiary *** of this model remained unaffected under different water supply conditions,and the optimization model reliably examined the effects of alternate water allocation and management rules with field *** improves efficiency and equity in water allocation with respect to crop growth stages and water shortages rather than simply cutting irrigation supply on a proportional basis to overcome water shortages.

关键词： irrigation optimization simulation equitable deliveries rice

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