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The Crop Journal 2014年第5期2卷 338-344页

作者： Rakesh Kumar dibyendu chatterjee Narendra Kumawat Avinash Pandey Aniruddha Roy Manoj Kumar ICAR Research Complex for NEH Region Nagaland CentreJharnapani Medziphema Nagaland 797 103 India Senior Research Fellow Agricultural Research Station SK Rajasthan Agricultural UniversityBikaner Rajasthan 334 006 India ICAR Research Complex for NEH Region Umiam Meghalaya 793 103 India

To evaluate the response to lime on cultivars of ricebean(Vigna umbellata), a field experiment was conducted during the two consecutive rabi seasons of 2010–2011 and 2011–2012 in the Nagaland foothills, India. The experiment used a split-plot design with four levels of lime(control, 0.2, 0.4and 0.6 t ha-1) in main plots and four ricebean cultivars(RBS-16, RBS-53, PRR-2, and RCRB-4) in sub-plots with three replicates. The results revealed that increasing levels of lime(in the furrow)from 0 to 0.6 t ha-1significantly increased growth, yield attributes and yield. The quality parameters of ricebean were also influenced significantly by the application of lime. Maximum gross return(INR 39,098 ha-1), net return(INR 27,281 ha-1), benefit:cost(B:C) ratio(2.29),production efficiency, and economic efficiency were also realized with the application of lime at 0.6 t ha-1. Among the ricebean cultivars, RBS-53 produced significantly higher growth, yield attributes, grain yield, straw yield, biological yield, and harvest index. Similarly, yield and protein content were higher in RBS-53. Maximum gross return, net return, B:C ratio, production efficiency, and economic efficiency were observed for RBS-53.

关键词： Economics Lime application Ricebean Response curve Yield attributes

Carbon and water footprints of major crop production in India

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Pedosphere 2023年第3期33卷 448-462页

作者： Amaresh Kumar NAYAK Rahul TRIPATHI Manish DEBNATH Chinmaya Kumar SWAIN Biswaranjan DHAL Shanmugam VIJAYKUMAR Anshuman Debasis NAYAK Sangita MOHANTY Mohammad SHAHID Anjani KUMAR Manoj RAJAK Khitish Chandra MOHARANA dibyendu chatterjee Susmita MUNDA Pravat GURU Rubina KHANAM Banwari LAL Priyanka GAUTAM Suschismita PATTANAIK Arvind Kumar SHUKLA Nuala FITTON Pete SMITH Himanshu PATHAK Indian Council of Agriculture Research(ICAR)-National Rice Research Institute Cuttack 753006(India) ICAR-Central Sheep and Wool Research Institute Avikanagar 304501(India) ICAR-National Research Centre on Camel Bikaner 304001(India) ICAR-Indian Institute of Soil Science Bhopal 462038(India) Institute of Biological and Environmental Sciences University of Aberdeen23St Machar DriveAberdeen AB243UU(UK)

Scarcity of water and emission of greenhouse gases(GHGs)are the two key environmental issues affecting crop production in *** the carbon footprint(CF)and water footprint(WF)of crop production can help to mitigate the environmental hazards that stem from GHG emissions and water *** CFs and WFs of three major cereal crops,rice,wheat,and maize,were estimated for the year 2014 under the environmental conditions in India,based on national statistics and other data *** CFs(TCFs)of rice,wheat,and maize in India were estimated to be 2.44,1.27,and 0.80 t CO_(2)equivalent ha-1,respectively,and product WFs for rice,wheat,and maize in India were 3.52,1.59,and 2.06 m3 kg^(-1),*** WF was found to be the highest in West India for rice and in South India for both wheat and maize,with the highest irrigation water use in these *** was a positive correlation between TCF and total WF,and hence mitigation of both was possibly simultaneous in various regions in *** measures for mitigating GHG emissions and optimizing water use for rice,wheat,and maize production in India are recommended in this paper.

关键词： cereal crop crop planning green water footprint greenhouse gas emission water productivity water use

Folic acid protects against fluoride-induced oxidative stress and testicular damage in rats

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Asian pacific Journal of Reproduction 2021年第6期10卷 274-283页

作者： Ray dibyendu chatterjee Tiasa Monalisha Das Panda Pradip Mukherjee Sandip Department of Physiology Serampore CollegeSeramporeHooghly-712201West BengalIndia Department of Statistics Serampore CollegeSeramporeHooghly-712201West BengalIndia

Objective:To investigate the effects of folic acid on testicular oxidative damage in sodium fluoride-induced male Wistar ***:A total of 24 male Wistar rats were divided into 4 groups:the control,sodium fluoride(fed with 100 mg/L sodium fluoride through drinking water orally for 21 days),folic acid(36μg/kg body weight/day,orally),and sodium fluoride plus folic acid(received similar dose orally)*** the end of 21 days,epididymal sperm parameters,biochemical analysis of testicular tissue,and serum hormonal levels were performed along with histopathological ***:Sodium fluoride intoxication resulted in marked reduction in gonado somatic index,serum luteinizing hormone,and testosterone level along with 3β-hydroxysteroid dehydrogenase and 17β-hydroxysteroid dehydrogenase *** addition,reduction in sperm density,as well as loss of sperm motility and sperm viability,were also ***,increased levels of testicular malondialdehyde,nitrite,interleukin-6 and tumor necrosis factor-α as well as decreased levels of superoxide dismutase and catalase activities and reduced glutathione content were found to be associated with this *** acid co-treatment,on the other hand,could prevent all the sodium fluoride-induced testicular pathophysiology and oxidative stress related *** examinations of testicular sections from the experimental rats supported these ***:Combining all,this study suggests that being an antioxidant,folic acid plays a beneficial role against fluoride-induced adverse effects on the male reproductive system.

关键词： Sodium fluoride Folic acid Testicular damage Sperm Oxidative stress Antioxidants

Segmentation and classification of high spatial resolution images based on Hölder exponents and variance

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Geo-Spatial Information Science 2017年第1期20卷 39-45页

作者： Debasish Chakraborty Sourabh Singh dibyendu Dutta Regional Remote Sensing Centre-East National Remote Sensing CentreISRONew TownKolkataIndia Department of Computer Science and Engineering SMITSikkimIndia

Pixel-based or texture-based classification technique individually does not yield an appropriate result in classifying the high spatial resolution remote sensing imagery since it comprises textured and non-textured *** this study,Hölder exponents(HE)and variance(VAR)are used together to transform the image for measuring texture.A threshold is derived to segment the transformed image into textured and non-textured ***,the original image is extracted into textured and non-textured regions using this segmented image ***,extracted textured region is classified using ISODATA classification algorithm considering HE,VAR,and intensity values of individual pixel of textured *** extracted non-textured region of the image is classified using ISODATA classification *** case of non-textured region,HE and VAR value of individual pixel is not considered for classification for significant textural variation is not found among different ***,the classified outputs of non-textured and textured regions that are generated independently are merged together to get the final classified *** 1 m PAN images are classified using the proposed algorithm,and the classification accuracy is more than 88%.

关键词： High-resolution image texture segmentation Hölder exponents variance contrast classification ISODATA

Effect of water regimes and organic matters on transport of arsenic in summer rice (Oryza sativa L.)

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Journal of Environmental Sciences 2011年第4期23卷 633-639页

作者： Sefaur Rahaman Ashim Chandra Sinha dibyendu Mukhopadhyay Senior Research Fellow Department of Agronomy Faculty of Agriculture Uttar Banga Krishi Viswavidyalaya Pundibari Cooch Behar West Bengal-736165 India. Department of Agronomy Faculty of Agriculture Uttar Banga Krishi Viswavidyalaya Pundibari Cooch Behar West Bengal-736165 India Reader and Head Department of Soil Science & Agricultural Chemistry Faculty of Agriculture Uttar Banga Krishi Viswavidyalaya Pundibari Cooch Behar West Bengal-736165 India

The arsenic contamination in soil-water-plant systems is a major concern of where, the groundwater is being contaminated with arsenic （above 0.01 mg/L） in the Indian subcontinent. The study was conducted with organic matter to find out the reducing effect on arsenic load to rice （cv. Khitish）. It was observed that intermittent ponding reduced arsenic uptake （23.33% in root, 13.84% in shoot and 19.84% in leaf） at panicle initiation stage, instead of continuous ponding. A decreasing trend of arsenic accumulation （root straw husk whole grain milled grain） was observed in different plant parts at harvest. Combined applications of lathyrus ＋ vermicompost ＋ poultry manure reduced arsenic transport in plant parts （root, straw, husk, whole grains and milled grain） which was significantly at par （p 0.05） with chopped rice straw （5 tons/ha ）＋ lathyrus green manuring （5 tons/ha） in comparison to control and corresponding soils. A significant negative correlation of arsenic with phosphorus （grain P with arsenic in different parts R 2 = 0.627–0.726 at p 0.01） was observed. Similarly, soil arsenic had a negative correlation with soil available phosphorus （R 2 = 0.822 at p 0.001） followed by soil nitrogen （R 2 = 0.762 at p 0.01） and soil potassium （R 2 = 0.626 at p 0.01）. Hence, effective management of contaminated irrigation water along with organic matter could reduce the arsenic build up to plants and soil.

关键词： arsenic intermittent ponding lathyrus organic nutrients poultry manure saturation and vermicompost

Variation in species assemblages due to micro-topography and flow regime govern vegetation carbon stock in seasonal floodplain wetlands

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Ecological Processes 2019年第1期8卷 602-616页

作者： Priyanka Sarkar Tapati Das dibyendu Adhikari Department of Ecology and Environmental Science Assam UniversitySilchar 788011India Department of Botany North-Eastern Hill UniversityShillong 793022India

Hypothesis:Variation in species assemblages due to micro-topographic features and flow regime determine vegetation carbon stock in floodplain *** and method:We tested this hypothesis in Chatla—a tropical floodplain wetland located in northeast *** sampling stations characterized by contrasting micro-topographic and flow parameters were selected in the wetland for *** composition,assemblage pattern,and vegetation carbon stock were studied in these stations during three flood phases,i.e.,early,middle,and late flood phases following standard *** and multivariate statistics were used to determine the relationship between the selected environmental parameters,plant species assemblages,and vegetation carbon stock of the ***:Thirty-one species of herbs and five species of shrubs were recorded from the five stations in Chatla floodplain *** regime characterized by water flow velocity and discharge showed substantial variations across the *** parameters in turn are related to variations in the micro-topographic characteristics namely depth,width,and cross-sectional area of the *** species composition and abundance differed significantly with respect to micro-topography and flow regime as revealed by the cluster *** canonical correspondence analysis revealed strong association of plant species assemblages with the micro-topography and flow regime within the *** regression analysis revealed a significant positive relationship of the vegetation carbon stock with the water ***:Spatial variation in plant species diversity because of micro-topography and flow regime determines the vegetation carbon stock in floodplain *** of these parameters by anthropogenic activities such as mining and quarrying may potentially influence the carbon stocking potential of seasonal floodplain ***,appropriate measures should be taken to main

关键词： Riparian vegetation Tropical wetland Vegetation biomass Ecosystem services Northeast India

Soil carbon pools of six ecological regions of the United States

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Journal of Forestry Research 2020年第5期31卷 1933-1938页

作者： Amitava chatterjee Department of Soil Science North Dakota State UniversityFargoND 58108-6050USA

Mineralisable soil organic carbon(SOC)pools vary with ecosystem type in response to changes in climate,vegetation and soil *** the effect of climate and soil factors on SOC pools is critical for predicting change over *** soil samples from six ecoregions of the United States were analyzed for permanganate oxidizable C(KMnO4-C)and mineralizable C *** of SOC ranged from 7.9 mg g^-1(Florida site)to 325 mg g^-1(Hawaii site).Mineralisable C pools and KMnO4-C were highest in soils from the Hawaii *** annual precipitation explains SOC and resistant C pool *** content was related to mineralisable active C pools and bacterial *** annual precipitation and clay content are potential variables for predicting changes in SOC pools at large spatial scales.

关键词： Permanganate oxidizable carbon(KMnO4-C) Resistant carbon pool Mean residence time Soil carbon pools United States

Development of a Tribofidelic Human Heel Surrogate for Barefoot Slip Testing

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Journal of Bionic Engineering 2022年第2期19卷 429-439页

作者： Subhodip chatterjee Arnab Chanda Centre for Biomedical Engineering Indian Institute of Technology DelhiNew Delhi 110016India Department of Biomedical Engineering All India Institute of Medical ScienceNew Delhi 110029India

Barefoot slips contribute to over 37% of recurrent fall-related injuries across all age *** study slip risk across a wide range of flooring conditions,slip meters with barefoot surrogates(i.e.,sensors,as per ASTM standard nomenclature)such as animal skins and rubbers have been used to date,which exhibit biomechanical and frictional properties widely different from the barefoot human *** of a surrogate which can accurately simulate the human heel skin properties would be immensely beneficial for realistic assessment of barefoot slipping risk.A novel surrogate was developed using 3D scanning and printing,and biomimetics,which precisely simulates the biomechanical and frictional properties of the barefoot human heel *** slip testing was conducted with this surrogate on three common bathroom floorings and with six different *** of Friction(COF)results similar to human slipping experiments,high repeatability and reproducibility across wet and oily flooring conditions,were confirmed through experiments with the developed heel skin *** heel skin surrogate would be an indispensable model for accurate estimation of barefoot risk against slips and falls in bathrooms,bathtubs,and swimming pools.

关键词： Barefoot Surrogate Slip Fall Bathroom Bathtub

Use of Biotic Community Structure as a Measure of Ecological Degradation

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应用与环境生物学报 2007年第5期13卷 662-667页

作者： SANJIB Kumar Das dibyendu Biswas SUDIPTO Roy Environmental Science Department Netaji Subhas Open UniversityKolkata-700020West BengalIndia Department of Engineering Physics Calcutta Institute of Engineering and ManagementKolkata-700040West BengalIndia

The benthic macroinvertebrate communities of two lotic aquatic habitats,namely,the Churni River(C-R)and the Jalangi River(J-R)were compared in this *** lotic aquatic system(C-R)was polluted by organic pollutants due to discharge of unprocessed sewage water,while the other(J-R)was not affected by such *** of various physico-chemical properties of water,sediment and different macroinvertebrate communities of the two tropical lotic systems were done in a period from January,2002 to December,2003.A long term temporal change in the macroinvertebrate communities was recorded due to increase in sediment rH *** redox potential affected by the anthropogenic activities was found to be an important factor for alteration of macroinvertebrate communities in these aquatic ecosystems.A positive correlation has been established between rH and Margalef index in this *** and the total count of coliform bacteria in water showed significantly higher values for the polluted Churni River than those for the Jalangi *** 3,Tab 4,Ref

关键词：生物群落结构生态退化测量系统大型无脊椎动物氧化还原电位有机污染

Isolation and characterization of a profenofos degrading bacterium

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Journal of Environmental Sciences 2009年第11期21卷 1591-1597页

作者： Saadatullah Malghani Nivedita chatterjee Key Laboratory of Biogeology and Environmental Geology Ministry of Education of China School of Environmental StudiesChina University of Geosciences

Profenofos, a well known organophosphate pesticide, has been in agricultural use over the last two decades for controlling Lepidopteron pests of cotton and tobacco crops. In this study, a bacterial strain, OW, was isolated from a long term profenofos exposed soil by an enrichment technique, and its ability to degrade profenofos was determined using gas chromatography. The isolated strain OW was identified as Pseudomonas aeruginosa according to its physiological and biochemical properties, and the analysis of its 16S rRNA gene sequence. The strain grew well at pH 5.5-7.2 with a broad temperature profile. Bioremediation of profenofos-contaminated soil was examined using soil treated with 200 μg/g profenofos, which resulted in a higher degradation rate than control soils without inoculation. In a mineral salt medium （FTW）, removal in the level of profenofos of 86.81% was obtained within 48 h of incubation. The intermediates of profenofos metabolism indicated that the degradation occurred through a hydrolysis mechanism, and one of the metabolites was found to be 4 bromo-2-cholorophenol （BCP） which in turn was also mineralized by the strain. The results of this study highlighted the potentiality of P. aeruginosa as a biodegrader which could be used for the bioremediation of profenofos contaminated soil.

关键词： profenofos organophosphate pesticide Pseudomonas aeruginosa