Sustainable Environment最新文献_第9页

Adaptability, forage yield and nutritional quality of alfalfa (Medicago sativa) genotypes 苜蓿(Medicago sativa)基因型的适应性、饲料产量和营养品质

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1895475

Tessema Tesfaye Atumo, R. Kauffman, Deribe Gemiyo Talore, M. Abera, T. Tesfaye, B. Z. Tunkala, Muluken Zeleke, Getinet Kebede Kalsa

{"title":"Adaptability, forage yield and nutritional quality of alfalfa (Medicago sativa) genotypes","authors":"Tessema Tesfaye Atumo, R. Kauffman, Deribe Gemiyo Talore, M. Abera, T. Tesfaye, B. Z. Tunkala, Muluken Zeleke, Getinet Kebede Kalsa","doi":"10.1080/27658511.2021.1895475","DOIUrl":"https://doi.org/10.1080/27658511.2021.1895475","url":null,"abstract":"ABSTRACT Livestocks fed with high-quality forage deliver better milk and meat, which could benefit the nutritional health of their keepers and consumers. Six alfalfa genotypes were assessed across four locations, Arba Minch, Areka Mante Dubo, Bonga and Hawassa Dilla, for adaptability, forage dry matter (DM) yield, crude protein (CP) concentration, nutrient composition and digestibility characteristics from August 2016 to January 2019. The genotypes were evaluated in a randomized complete block design with four replications. Plant height at forage harvest was significantly (P < 0.001) varied across the environment among genotypes. Nutrient components, such as neutral detergent fiber, acid detergent fiber and lignin, hemicelluloses, in vitro DM digestibility and relative feed value, were significantly (P < 0.01) different for genotype variations. The highest mean DM yield was recorded for FGI-9001 followed by FGI-3054. The highest plant height was recorded for FGI-8091 (60.13 cm), while the shortest genotype was FGI-1011. CP yield was recorded above the threshold level for all genotypes in the test. Highest in vitro DM digestibility and relative feed value with the lowest neutral detergent fiber, acid detergent fiber, and lignin and cellulose contents were recorded for FGI-9001. Tested alfalfa genotypes varied in terms of forage yield and nutritional quality at different locations. Thus, the result indicates the potential of genotypes, indicating the promotion to advanced varietal evaluation stages including animal test and release as better alternatives for use in the farming system in rain fed condition and irrigation.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"78 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89729369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Description of climatic factors for informed Sesame (Sesamum indicum L.) cultivation in Kafta Humera District, North Ethiopia 埃塞俄比亚北部Kafta Humera地区知情芝麻种植的气候因素描述

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1903699

K. T. Mawcha, Micheale Gebrekirstos Gebreslassie, Hailu Molla Gebreyohannes, Assefa.Mewael Kiros

{"title":"Description of climatic factors for informed Sesame (Sesamum indicum L.) cultivation in Kafta Humera District, North Ethiopia","authors":"K. T. Mawcha, Micheale Gebrekirstos Gebreslassie, Hailu Molla Gebreyohannes, Assefa.Mewael Kiros","doi":"10.1080/27658511.2021.1903699","DOIUrl":"https://doi.org/10.1080/27658511.2021.1903699","url":null,"abstract":"ABSTRACT Sesame is an important oil crop and is very well-known for its quality plant oil. The study was conducted in Kafta-Humera to assess the rainfall variability and distribution of the area at an annual, seasonal, and monthly and 10 days scales based on the daily rainfall; and to describe the summer based on the accumulated rainfall and dry spell durations. All the meteorological data were analysed using InStat statistical package software. The mean of the kiremt rainfall was 556 mm with 95% confidence for mean 479.8 to 633.43 mm and has high variability with a coefficient of variability about 0.24. The rainfall intensity during the Kiremt season in Humera showed that the seasonal rainfall varies from 307.1 mm to 777 mm in 4 months. March, April, and May were the hottest months, where all the years have at least 1 day with a maximum temperature of above 44°C and the mean seasonal rainfall was 556.61 mm. The variability of the mean temperatures of all the months were very less except for July, August, and October with very high mean monthly temperature variability (SD>4). Kiremt, the main rainy season onset is the first wet spell of the year at least 3 days totalling 20 mm or more, provided there were no sequences of 10 or more dry days in the subsequent 30 days. The start date of sowing at Kafta-Humera was 19 June with a 95% confidence interval of average 07 June to 01 July. It had high variability with a standard deviation of about 2 weeks. Hence, farmers should arrange their sowing time in between the summer onset ranges, i.e. 07 June to 01 July.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"1 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84611359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Comparison of carbon stock potential of farmland trees in the midlands of Hawzen, Northern Ethiopia 埃塞俄比亚北部哈森中部地区农田树木碳储量潜力比较

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1973696

Haftom Hagos, G. Tesfay, Emiru Brhane, Haftu Abrha, Temesgen Bezabh, Birhane Tesfay, Biniyam Yisehak

{"title":"Comparison of carbon stock potential of farmland trees in the midlands of Hawzen, Northern Ethiopia","authors":"Haftom Hagos, G. Tesfay, Emiru Brhane, Haftu Abrha, Temesgen Bezabh, Birhane Tesfay, Biniyam Yisehak","doi":"10.1080/27658511.2021.1973696","DOIUrl":"https://doi.org/10.1080/27658511.2021.1973696","url":null,"abstract":"ABSTRACT In addition to the provisioning and supporting ecosystem services, trees on agricultural landscape provide regulating services. Storing carbon in different carbon pools is one of the regulating services offered by trees on farm. However, the carbon storing potential varies with variation in altitudinal class. This study compared the carbon stock potential of farmland trees considering two altitudinal classes, Weina-kola (1500–2000 meter.) and Wein-dega (2000–2500 meter.) in Hawzen district, northern Ethiopia. These traditional altitudinal classes are interpreted as warm and tepid, respectively. Twelve farm sample plots having an area of half a hectare were chosen randomly from both the study sites. A total of 24 composite and 24 undisturbed soil samples were collected from the sample farm plots from 0–15 cm and 15–30 cm soil depths for soil organic carbon (SOC) and bulk density (BD) analysis, respectively. The result showed that total biomass carbon was significantly higher (p < 0.01) in farmland trees of Weina-kola than the Weina-dega. The total biomass carbon was estimated 8.43 and 3.25-ton C ha-1 in Weina-kola and Weina-dega, respectively. Total soil carbon and total carbon did not show significant variation between the two altitudinal classes. The reason for this could be the differences in soil types, environmental variables and management regimes. Hence, this study concluded that altitudinal variation determines the type, number and size of trees grew in each class and brought significant difference in total biomass carbon stored in farmland trees.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"170 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72792686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Climate change and political (in)action: an intergenerational epistemic divide? 气候变化和政治行动:代际认知鸿沟?

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1951509

S. Murphy

{"title":"Climate change and political (in)action: an intergenerational epistemic divide?","authors":"S. Murphy","doi":"10.1080/27658511.2021.1951509","DOIUrl":"https://doi.org/10.1080/27658511.2021.1951509","url":null,"abstract":"ABSTRACT This paper critically examines the constructed narrative that there is an epistemic intergenerational divide on the topic of climate change, climate science, and the political actions necessary to address the most urgent threats. Analysing publicly available social media data, this paper traces the amplification of youth voice during 2019 and the emergence of this narrative. It compares the dominant messages against 2019 Afrobarometer and Eurobarometer reports which explore voter perspectives on climate change and climate action. Through a process of critical analysis it argues that the constructed narrative of an intergenerational epistemic divide is misleading. It argues that youth voices are subject to structural forms of epistemic injustice and exclusion in climate action deliberations and policy making. However, it finds that voters and older generations are also subject to similar forms of exclusion. Rather than framing this as an epistemic problem, this analysis points to the political-economy climate justice factors influencing the debate. It argues that the real points of contention now rest at the science-policy interface and with what happens when scientific evidence is refracted through dominant political ideologies and translated into policy.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"11 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84756581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Land use/land cover dynamics, trade-offs and implications on tropical inland shallow lakes’ ecosystems’ management: Case of Lake Malombe, Malawi 土地利用/土地覆盖动态、权衡及其对热带内陆浅湖“生态系统”管理的影响:马拉维Malombe湖的案例

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1969139

R. Makwinja, S. Mengistou, E. Kaunda, T. Alamirew

引用次数: 7

Differential pulse voltammetric determination of hexavalent chromium using nickel hexacyanoferrate modified glassy carbon electrode 六氰高铁酸镍修饰玻碳电极差分脉冲伏安法测定六价铬

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1978633

Wendimagegn T. Dinbore, Wolde C. Dabbo, Aemayehu P. Washe

{"title":"Differential pulse voltammetric determination of hexavalent chromium using nickel hexacyanoferrate modified glassy carbon electrode","authors":"Wendimagegn T. Dinbore, Wolde C. Dabbo, Aemayehu P. Washe","doi":"10.1080/27658511.2021.1978633","DOIUrl":"https://doi.org/10.1080/27658511.2021.1978633","url":null,"abstract":"ABSRACT The current boom in the industrial sector of the country is arise scientific concern about environmental contamination by heavy metals such as chromium. The objective of this project is to fabricate a sensitive and selective electrode for differential pulse voltammetric determination of Cr (VI) in water samples and demonstrate its applicability in complex matrices such as tannery effluent. The drop casting method is use for electrode development. Experimental variables that can influence the DPV response of the developed electrode for Cr (VI) including strength of supporting electrolytes, pH of the solution, and concentration parameters were optimized. The figures of merit of the developed electrode were evaluated and the applicability was demonstrated through determination of Cr (VI) in tannery effluent water. The developed electrode was detected a very low level of Cr (VI) in acetate buffer at pH 5 with limit of detection and limit of quantification 0.0885 and 0.2950 μmol L−1, respectively. The linear calibration plot is R2 value of 0.999 suggesting a very good correlation between DPV current response and concentration of Cr (VI). The current electrode was simple to develop and can successfully be applied for the determination of Cr (VI) in wastewater samples.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"87 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81739945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluation of the effect of recycled waste plastic bags on mechanical properties of hot mix asphalt mixtures for road construction 再生废塑料袋对道路施工用热拌沥青混合料力学性能影响的评价

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1957649

Nakachew Assefa

{"title":"Evaluation of the effect of recycled waste plastic bags on mechanical properties of hot mix asphalt mixtures for road construction","authors":"Nakachew Assefa","doi":"10.1080/27658511.2021.1957649","DOIUrl":"https://doi.org/10.1080/27658511.2021.1957649","url":null,"abstract":"ABSTRACT An increase in population with a tremendous growth rate, the disposal of large amounts of non-decaying waste materials becomes a great concern in developing and developed countries. Also, due to an increase in traffic volumes and loading repetitions, surface distress was observed in most of the asphalt roads. Therefore, recycling waste plastic into a new product is a solution. A cleaned, dried, and grind waste plastic bag is introduced to the asphalt mixture from 6–18% with a 3% increment by the weight of optimum bitumen content for each nominal maximum aggregate size. A total, 171 Marshall and indirect tensile strength samples were prepared. From the test result, the optimum waste plastic bag replacement of 17, 13, and 7% are obtained for 9.5, 12.5, and 19 mm nominal maximum aggregate sizes respectively. From the comprehensive experimental results, its concluded that asphalt mixtures mixed with the optimum amount of waste plastic bag, Marshall stability and tensile strength ratio results can increase on average by 8 % and 4 % respectively. Stability, flow, bulk density, voids, and moisture susceptibility results satisfy the Ethiopian Road Authority minimum specifications.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"27 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73343907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Risk perception of Chinese elderly: An urban study on adaptation to climate change 中国老年人的风险认知:基于城市适应气候变化的研究

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1988384

Pelin Kınay, Andrew P. Morse, Karyn Morrissey, Mehmet Refik Yücel, P. Staddon

{"title":"Risk perception of Chinese elderly: An urban study on adaptation to climate change","authors":"Pelin Kınay, Andrew P. Morse, Karyn Morrissey, Mehmet Refik Yücel, P. Staddon","doi":"10.1080/27658511.2021.1988384","DOIUrl":"https://doi.org/10.1080/27658511.2021.1988384","url":null,"abstract":"ABSTRACT Older people are more vulnerable to climate change and with its increasing elderly population, inadequate research on the health impacts of climate change has focused on this particular population in China. This study evaluates climate change and health-related knowledge, attitudes and practices (KAP) of elderly residents in three cities Suzhou, Hefei and Xiamen. This cross-sectional study included 3466 participants. Data analysis was undertaken using descriptive methods (Chi-square test). Results showed that the elderly were most concerned about heatwaves, flooding and drought and the main perceived health risks included heatstroke and respiratory diseases. Finally, over half of the participants from Suzhou city reported that they did not receive enough government assistance in extreme events (56%). Findings from this work provide important insights for new adaptation strategies targeting the elderly population. It is recommended that the government should focus on creating awareness of the necessary adaptations the elderly will need to take to alleviate the impact of climate change on their physical health.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"59 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80923696","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Syntrophic interactions in anaerobic digestion: how biochar properties affect them? 厌氧消化中的共生相互作用:生物炭特性如何影响它们?

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1945282

Davidraj Johnravindar, R. D. Patria, J. Lee, Le Zhang, Y. Tong, Chi‐Hwa Wang, Y. Ok, Guneet Kaur

{"title":"Syntrophic interactions in anaerobic digestion: how biochar properties affect them?","authors":"Davidraj Johnravindar, R. D. Patria, J. Lee, Le Zhang, Y. Tong, Chi‐Hwa Wang, Y. Ok, Guneet Kaur","doi":"10.1080/27658511.2021.1945282","DOIUrl":"https://doi.org/10.1080/27658511.2021.1945282","url":null,"abstract":"ABSTRACT Biochar as a biomass derived, low cost, carbon conductive material is considered as an important supplement in the anaerobic digestion (AD) of organic matter. It functions as an electrical grid to allow direct electron transfer from fatty acid oxidizers to methanogenic archaea, thereby promoting syntophy between various microbial groups and leading to efficient methanogenesis. Specific properties of biochar play an important role in promoting syntrophic interactions in AD. As a physical indicator, surface area, porosity, particle size and surface texture of biochar play an important role in governing microbial attachment and enrichment on biochar. This influences the microbial degradation of fatty acids and their subsequent conversion to methane by methanogens. Chemical properties such as the presence of hydrophobic functional groups, molecular nature and redox active groups on biochar surface promote interaction between biochar and microorganisms and provide an increased degree of electron transfer between the attached microorganisms. The above characteristics depend on feedstock and pyrolysis conditions used for biochar production. Unlike previous reviews, herein the desired physical and chemical properties of biochar that promote syntrophy in AD and the factors that influence them have been discussed in detail. Furthermore, engineering of biochar properties by various activation methods to harness favourable characteristics of biochar as an effective AD additive is described. Such a comprehensive account would be useful for engineering efficient biochar-mediated digestions with enhanced syntrophy and overall AD performance.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"56 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73004705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

A conceptual framework of the impact of maternal early life drought exposure on newborn size in Malawi 马拉维孕产妇早期生活干旱暴露对新生儿大小影响的概念框架

IF 2.3

Sustainable Environment Pub Date : 2021-01-01 DOI: 10.1080/27658511.2021.1951017

Thokozani Hanjahanja-Phiri

{"title":"A conceptual framework of the impact of maternal early life drought exposure on newborn size in Malawi","authors":"Thokozani Hanjahanja-Phiri","doi":"10.1080/27658511.2021.1951017","DOIUrl":"https://doi.org/10.1080/27658511.2021.1951017","url":null,"abstract":"Abstract The effects of adverse prenatal conditions are not only experienced over the life course but can be passed on intergenerationally. The present study took advantage of a natural experiment from three drought periods of 1981/82, 1987/88, and 1992/93 that occurred in Malawi with varying severity and used data from a randomized clinical trial (RCT), conducted between 2011–2015 (Protocol #NCT01239693). The present study aimed to assess the effect of the interactions between maternal exposure to drought in early life and prenatal supplementation with a novel supplement [small quantity (SQ), lipid-based nutrient supplement (LNS)], the standard of care prenatal supplement [iron-folic acid or IFA], or a close substitute of the standard of care [multiple micronutrients or MMN], on subsequent infant birth outcomes. During data analysis, ordinary least squares were used to run multiple regressions. The regression results were as follows. When there was no maternal exposure to drought, SQ-LNS compared to IFA appeared to improve subsequent infant birth outcomes for length-for-age Z score or LAZ (0.403 standard deviation (SD), Confidence interval CI [0.099, 0.708]), for subsequent infant weight-for-age Z score or WAZ (0.372 SD, CI [0.053, 0.691]), and for imputed infant birthweight or BTW (125.900 g, CI [2.901, 248.899]). In conclusion, the results show a pattern emerging whereby some positive associations can be observed, specifically, when maternal non-drought exposure variables and the SQ-LNS variable interact. Their combined effects on subsequent infant birth outcomes notably subsequent infant LAZ, subsequent infant WAZ, and subsequent infant imputed BWT appear to be positive.","PeriodicalId":29858,"journal":{"name":"Sustainable Environment","volume":"32 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81030093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0