检索结果-南通市图书馆

Silver fir tree-ring fluctuations decrease from north to south latitude—total solar irradiance and NAO are indicated as the main influencing factors

引用

Forest Ecosystems 2023年第6期10卷 717-731页

作者： Vaclav Simůnek Anna Prokůpkova Zdenek Vacek Stanislav Vacek Jan Cukor Jirí Remes Vojtech Hajek Giuseppe D'Andrea Martin Salek Paola Nola Osvaldo Pericolo Sarka Holzbachova Francesco Ripullone faculty of forestry and Wood Sciences Czech University of Life Sciences PragueKamýcka 129CZ—16500Prague 6SuchdolCzech Republic forestry and Game management Research Institute v.v.iStrnady 13625202JílovisteCzech Republic Czech Academy of Sciences Institute of Vertebrate BiologyKvetna 860365BrnoCzech Republic Department of Earth and environmental Sciences University of PaviaVia S.Epifanio 14I-27100PaviaItaly Forests of the Czech Republic SOEPremyslova 1106/19NovýHradec Kralove50008Hradec KraloveCzech Republic School of Agricultural Forestry and Environmental SciencesUniversity of BasilicataViale dell’Ateneo Lucano 10I-85100PotenzaItaly faculty of environmental Sciences Czech University of Life Sciences PragueKamýcka 129CZ—16500PragueSuchdolCzech Republic

Silver fir(Abies alba Mill.)is a flexible European tree species,mainly vegetating within the mountainous regions of Europe,but its growth responses across its latitudinal and longitudinal range have not yet been satisfactorily verified under changing environmental *** study describes the tree-ring increment of silver fir in research plots across a latitudinal gradient from the northern range in Czechia(CZ),through Croatia(HR)to the southernmost range in Italy(IT).The research aims to analyze in detail the dynamics and cyclicity of the ringwidth index(RWI)and how it relates to climatic factors(temperature and precipitation),the North Atlantic Oscillation(NAO),and total solar irradiance(TSI),including the determination of *** results show that the main drivers affecting fir growth are the seasonal NAO index and *** temperatures affect RWI early in the vegetation season,while lack of precipitation during the summer is a limiting factor for fir growth,especially in *** temperatures and temperatures in June and July negatively impact,while seasonal precipitation totals in the same months positively influence the RWI in all research plots across *** longest growth cycles in fir RWI were recorded in the northernmost studied plots in *** cyclical fluctuations recede approaching the *** cyclic increase in RWI is related to the TSI,which decreases its effect from north to *** TSI's effects vary,positively impacting CZ but negatively influencing HR while remaining relatively neutral in *** the other hand,seasonal NAO tends to negatively affect silver fir growth in HR and CZ but has a mildly positive effect in *** conclusion,the TSI and the influence of the seasonal NAO index are prevalent in the fir RWI and are accompanied by a greater cyclicity of RWI in Central Europe(temperature optimum)than in the Italian Mediterranean region,where this tree species is limited by climatic conditions,especially lack of pre

关键词： Abies alba Mill Tree-rings Solar cycle North Atlantic oscillation Precipitation Temperature

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A Simple Geospatial Nutrient Budget Model for Assessing Forest Harvest Sustainability across Nova Scotia, Canada

引用

Open Journal of forestry 2016年第5期6卷 420-444页

作者： Kevin Keys Joshua D. Noseworthy Jae Ogilvie David L. Burton Paul A. Arp Nova Scotia Department of Natural Resources Truro Nova Scotia faculty of forestry and environmental management UNB Fredericton New Brunswick Department of environmental Sciences Agricultural Campus Dalhousie University Truro Nova Scotia

A geospatial GIS-linked spreadsheet model (Nutrient Budget Model—Nova Scotia: NBM-NS) was developed for Nova Scotia to assess the long-term sustainability of forest harvest scenarios as constrained by primary nutrient inputs and outputs due to atmospheric deposition, soil weathering, and leaching. Harvest scenarios refer to user-defined stand-specific removal rates of bole wood, bark, branches, and foliage, based on current or projected forest inventories. These scenarios are evaluated within the context of existing data layers for current climate (mean annual precipitation and air temperatures), atmospheric deposition (N, S, Ca, Mg, K), and soil/substrate types, supplemented by species-specific look-up tables containing expected biomass fractions and nutrient concentrations. This article introduces this model to assess relative site quality and limiting nutrients for red spruce and sugar maple across Nova Scotia. This is followed by an output comparison involving 25 spruce plantations whereby NBM-NS determinations derived using “default” soil survey data are compared with those derived using plantation-specific soil data. Model output shows that (i) Ca and N are the main growth-limiting nutrients across Nova Scotia, (ii) currently projected plantation yields are generally not sustainable on sites underlain by slowly weathering soils, (iii) current soil base cation contents are generally lower than what is reported in historic soil survey reports, and (iv) model results are expected to vary within the context of changing climate, acid deposition levels, and data accuracy.

关键词： Forest Nutrition management Biomass Harvesting Sustainable Forest management Forest Plantation management

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evaluating and quantifying the effect of various spruce budworm intervention strategies on forest carbon dynamics in Atlantic Canada

引用

Forest Ecosystems 2022年第4期9卷 547-557页

作者： Zelin Liu Changhui Peng David AMacLean Louis De Grandpre Jean-Noel Candau Daniel Kneeshaw School of Geographic Sciences Hunan Normal UniversityChangsha410081China Department of Biological Sciences University of Qu�ebec at MontrealMontrealQC H3C 3P8Canada faculty of forestry and environmental management University of New BrunswickFrederictonNB E3B 5A3Canada Laurentian forestry Centre Canadian Forest ServiceNatural Resources CanadaQC G1V 4C7Canada Great Lake forestry Centre Canadian Forest ServiceNatural Resources CanadaON P6A 2E5Canada

Spruce budworm (SBW) outbreaks are one of the most devastating natural disturbances in spruce-balsam fir forests of eastern North America. Both early intervention strategy (EIS) and foliage protection strategy (FP) are being tested to limit forest losses, but the quantitative impact on forest carbon (C) dynamics is still unclear. In this study, we designed 19 separate scenarios of no intervention or varying success of EIS, FP, and their combination on SBW caused defoliation and mortality. We then used the TRIPLEX-Insect model to quantify their effects on forest C dynamics in the forests of the four provinces of Atlantic Canada. A scenario applying FP to 10%of the area with the greatest potential C losses of living biomass, protecting foliage in 10%of the forests is more realistic than higher proportion of FP given the high cost and large areas involved, resulted in reducing average cumulative net ecosystem productivity (NEP) from 2020 to 2039 by 56%–127%compared to a no outbreak *** results showed that FP would have to be applied everywhere to reduce tree mortality and increase NEP more than 8 years of successful EIS applied. However, if EIS can be successfully implemented for 12 years, it will maintain more forest C than FP applied everywhere during a moderate outbreak. We also found that the combination of EIS followed by FP in 10%of the areas disturbed by the SBW could maintain average cumulative NEP at similar levels to no defoliation in every province of Atlantic Canada. Black/red spruce forests younger than 60years old underwent the smallest changes in C dynamics whether using EIS, FP, or both. This highlights the importance of forest species, forest age, and their interactions on the effectiveness of a treatment during SBW outbreak. Overall, 31%–76%of the study area in Atlantic Canada could convert from a C sink to a source by 2039,if no protective measures are used under the worst-case scenarios, thus contributing to future climate warming.

关键词： Annual defoliation Natural disturbance Forest protection Net ecosystem productivity TRIPLEX-Insect Conifers

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Model of Optimal Forest management Unit Area for a Sustainable Forest Resource Administration

引用

Journal of environmental Science and Engineering(A) 2015年第1期4卷 14-20页

作者： Wahyu Andayani Department of Forest management Faculty of Forestry Gadjah Mada University Yogyakarta 55281 Indonesia

Deforestation is one of the most crucial problems in Indonesia. It creates a number of environmental problems, e.g., landslides, loss of biological diversity, and decrease of carbon sequestration which are impacting human lives, There are a number of underlying causes, often stemmed from the emphasis on a particular forest management objective. Despite numerous forest policies and regulations established by the government, deforestation continues to happen. Quite often, the policies and regulations remain ＂paper tiger＂, which means ineffectual on the ground. One of the contributing factors to deforestation is the lack of custodian for the management of the forests. The regulation, such as law No. 41/1999, stipulates that all state forests must be managed under a FMI3 （forest management unit） as the custodians. The objective of this research is to develop an optimal model for FMU. Using the LGP （linear goal programming）, this research attempts to develop an optimum model for conservation areas. It assumes that the existing zoning approach implemented by the government in conservation areas is inappropriate. The optimum zoning model is expected to improve forest management and restore the forest function as a life supporting system and biological diversity conservation.

关键词： FMU LGP optimum zoning.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Floristic composition and structure of the Kibate Forest along environmental gradients in Wonchi,Southwestern Ethiopia

引用

Journal of forestry Research 2021年第6期32卷 2669-2682页

作者： Misganaw Meragiaw Zerihun Woldu Vegard Martinsen Bal R.Singh Department of Plant Biology and Biodiversity management College of Natural and Computational SciencesAddis Ababa UniversityNational HerbariumP.O.Box 3434Addis AbabaEthiopia faculty of environmental Sciences and Natural Resource management Norwegian University of Life SciencesP.O.Box 50031432ÅsNorway

Dry evergreen montane forests in Ethiopia are severely *** status of species composition and structure of forest vegetation are important indicators to understand the trends of threats on local plant *** the present study,we examined the floristic composition and structure of the Kibate Forest,Wonchi Highland,Ethiopia along environmental ***-six(30 m×30 m)plots were established every 100 m interval along altitudinal gradients(2811‒3073 m a.s.l.)in five transect lines for vegetation and environmental data *** total,125 vascular plant species belonging to 104 genera and 52 families were *** species(14%)were endemic to Ethiopia and *** two most dominant families,Asteraceae(29 species)and Lamiaceae(eight species)accounted for 30%of the total number of *** highest number of species(54%)was *** major community types(viz.,Olinia rochetiana-Myrsine melanophloeos,Ilex mitis-Galiniera saxifraga,Erica arborea-Protea gaguedi,and Hagenia abyssinica-Juniperus procera)were *** highest species richness,evenness,diversity,and importance value index were in community types 2 and *** 82%of the species and all endemic taxa except five were recorded in these two community *** most dominant woody species were ***,***,Olea europaea ***,Myrica salicifolia,*** ***,and *** with different patterns of population *** results show that there was a weak correlation between species richness and *** findings confirm that environmental variables both with interactions(such as altitude)and without interactions(such as livestock grazing)significantly(pmanagement practices and conservation measures such as prohibiting forest clearing and overgrazing and planting indigenous trees through commu

关键词： Endemic species environmental gradient Floristic composition Kibate Forest Population structure Wonchi

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of Phytochemical Analysis,Nutritional Composition and Antimicrobial Activity of Moringa oleifera

引用

Phyton-International Journal of Experimental Botany 2022年第8期91卷 1817-1829页

作者： Naima Asghar Abida Aziz Muhammad Farooq Azhar Mohamed El-Sharnouby Uzma Irfan Iqra Rafiq Husnain Farooq Muhammad Ishaq Asif Rehmani Mohamed I.Sakran A.Altalhi Fahad M.Alzuaibr Ayman El Sabagh Department of Botany The Women UniversityMultan66000Pakistan Department of forestry and Range management Bahauddin Zakariya UniversityMultan60800Pakistan Department of Biotechnology College of ScienceTaif UniversityTaif21944Saudi Arabia Department of environmental Sciences University of CaliforniaRiverside92521USA Department of forestry Rangeand WildlifeGhazi UniversityDera Ghazi Khan32200Pakistan Department of Agronomy Ghazi UniversityDera Ghazi Khan32200Pakistan Biochemistry Department Faculty of ScienceUniversity of TabukTabuk47512Saudi Arabia Biology Department Faculty of ScienceTaif UniversityTaif21944Saudi Arabia Department of Biology Faculty of ScienceUniversity of TabukTabuk71491Saudi Arabia Department of Agronomy Faculty of AgricultureUniversity of KafrelsheikhKafr Elsheikh33516Egypt

Moringa oleifera is a miracle plant rich in nutrients,antioxidants,and antibiotic *** study was designed to evaluate various biochemical attributes of leaves and flowers of *** parts(leaves,flowers)of ***,collected from different roadsides of Multan district,Punjab,Pakistan,were used as experimental *** indicates that alkaloids,saponin,carbohydrates,fats,and protein had a high value in the aqueous extract of both leaves and flowers of *** phenol content was high in methanolic leaves extract and the phenol contents were high in aqueous extract of *** extract yield of *** leaves and flowers both showed a higher percentage in aqueous extract(57.5%),followed by methanol extract and lowest in ethyl acetate *** contents were higher in ethyl acetate extract of leaves(33.67%)and aqueous extract of flowers(53.71%).While crude fiber was high in methanolic extract of leaves(12.40%)and in flowers crude fiber was high in ethyl acetate extract(15.86%).The moisture contents were higher in leaves(8.87%)than flowers(7.3%)and similarly,ash percentage in flowers(52.60%)than leaves(41.84%).Ethyl acetate extracts of *** leaves show antibacterial activity against Pseudomonas aeruginosa while methanolic extract of *** flowers shows antibacterial activity against Xanthomonas *** growth inhibits show in all extracts of leaves against Aspergillus flavus,***,and *** except for the concentrated aqueous extract of *** in flowers maximum growth inhibits all extracts against ***,***,and *** except the diluted ethyl acetate *** present in different parts of moringa have significant edible and commercial *** extracts exhibited significant antimicrobial activity,therefore have applications in pharmaceuticals.

关键词： Antifungal antioxidants phytochemical antibacterial phenolics plant extract medicinal properties

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrated application of February Orchid(Orychophragmus violaceus) as green manure with chemical fertilizer for improving grain yield and reducing nitrogen losses in spring maize system in northern China

引用

Journal of Integrative Agriculture 2015年第12期14卷 2490-2499页

作者： BAI Jin-shun CAO Wei-dong XIONG Jing ZENG Nao-hua GAO Song-juan Shimizu Katsuyoshi Key Laboratory of Plant Nutrition and Fertilizer Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural Sciences Soil and Fertilizer Institute Qinghai Academy of Agriculture and Forestry Sciences Qinghai University College of Resources and environmental Sciences Hunan Agricultural University faculty of Agriculture Kagoshima University

The development of more efficient management systems is crucial to achieving high grain yields with high nitrogen use efficiency（NUE）. February Orchid-spring maize rotation system is a newly established planting system with the benefits of ground cover and potential wind erosion in northern China. A field experiment was conducted to evaluate the effects of integrated application of February Orchid as green manure with reduction of chemical fertilizers（INTEGRATED） on spring maize yield, N uptake, ammonium volatilization, and soil residual mineral N in northern China. Compared to farmers＇ traditional fertilization（CON）, integrated application of February Orchid as green manure with 30% reduction of nitrogen fertilizers（INTEGRATED） increased maize grain yield and biomass by 9.9 and 10.2%, respectively. The 0–100 cm soil residual Nmin at harvest was decreased by 58.5% and thus nitrogen use efficiency was increased significantly by 26.7%. The nitrogen balance calculation further demonstrated that the INTEGRATED approach performed better than CON with lower apparent nitrogen loss（decreased by 48.9%） which evidenced by the ammonium volatilization of top-dressing fertilizer was decreased by 31.1%, the N_（min） movement to the deeper soil layers was reduced, and the apparent nitrogen leaching loss nearly equal to 0 under the INTEGRATED treatment. Therefore, in northern China, integrated application of green manure and chemical fertilizers is an efficient management approach for improving maize yields and NUE simultaneously.

关键词： cover crop ammonium volatilization mineral nitrogen nitrogen use efficiency nitrogen balance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Zonal differences of runoff and sediment reduction effects for typical management small watersheds in China

引用

International Soil and Water Conservation Research 2013年第1期1卷 39-48页

作者： Qi Junyu Sun Liying Cai Qiangguo faculty of forestry and environmental management at the University of New Brunswick 28 Dineen DriveFredericonNB E3B 6C2Canada Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources ResearchCASBeijing 100101China

In this particular study,99 typical managed small watersheds which representing five water erosion areas in China were selected to study zonality of Runoff Reduction Efficiency(RRE)and of Sediment Reduction Efficiency(SRE).The RRE is the ratio of Effect of Runoff Reduction(ERR)by soil and water conservation measure over management degree in a *** The SRE is the ratio of Effect of Sediment Reduction(ESR)by soil and water conservation measure over management degree in a *** of ah,statistical analysis was applied to test the zonal effects of RRE and SRE between different water erosion *** results showed that the mean RRE values in northern regions were significantly greater than those of southern regions;and the mean SRE values in northern regions were significantly greater than those in southern ***,the variation of RRE with runoff depth(H)was studied in direction of both latitude and longitude across regions influenced by East Asian ***,the variation of SRE with specific sediment yield(Y)was studied in direction of both latitude and longitude across regions influenced by East Asian *** results showed that RRE had the inverse variation trend as H in both latitude and longitude direction and SRE had the same variation trend as Y in both latitude and longitude ***,the variation of unit management area Runoff Reduction Rate(RRR)with H and RRE was studied in direction of both latitude and *** the variation of unit management area Sediment Reduction Rate(SRR)with Y and SRE was studied in direction of both latitude and *** was found that RRR had the similar variation trend as H in latitude direction and there was critical point around 37°N greater than which RRR began to be equal to H or even larger;RRR had the similar variation trend as H in longitude direction and there was a critical point around 109°E lees than which RRR began to equal to or greater than H;SRR had the simil

关键词： Zonality Soil and water conservation Effects of runoff reduction Effects of sediment reduction

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Do model choice and sample ratios separately or simultaneously influence soil organic matter prediction?

引用

International Soil and Water Conservation Research 2022年第3期10卷 470-486页

作者： Kingsley John Yassine Bouslihim Kokei Ikpi Ofem Lahcen Hssaini Rachid Razouk Paul Bassey Okon Isong Abraham Isong Prince Chapman Agyeman Ndiye Michael Kebonye Chengzhi Qin Department of Soil Science and Soil Protection Faculty of AgrobiologyFoodand Natural ResourcesCzech University of Life SciencesKamýcka 12916500PragueCzech Republic National Institute of Agricultural Research Morocco Department of Soil Science Faculty of AgricultureForestry and Wildlife Resources ManagementUniversity of CalabarPMB 1115540004Etta Agbo RoadCalabarNigeria State Key Laboratory of Resources and environmental Information System Institute of Geographical Sciences and Natural Resources ResearchCASBeijing100101China

This study was performed to examine the separate and simultaneous influence of predictive models’choice alongside sample ratios selection in soil organic matter(SOM).The research was carried out in northern Morocco,characterized by relatively cold weather and diverse geological *** dataset herein used accounted for 1591 soil samples,which were randomly split into the following ratios:10%(∼150 sample ratio),20%(∼250 sample ratio),35%(∼450 sample ratio),50%(∼600 sample ratio)and 95%(∼1200 sample ratio).Models herein involved were ordinary kriging(OK),regression kriging(RK),multiple linear regression(MLR),random forest(RF),quantile regression forest(QRF),Gaussian process regression(GPR)and an ensemble *** findings in the study showed that the accuracy of SOM prediction is sensitive to both predictive models and sample *** combined with 95%sample ratio performed equally to RF in conjunction with all the sample ratios,as the latter did not show much sensitivity to sample *** results revealed that RF with a∼10%sample ratio could also be optimum for predicting SOM in the study *** conclusion,the findings herein reported could be instrumental for producing cost-effective detailed and accurate spatial estimation of SOM in other ***,they could serve as a baseline study for future research in the region or ***,we recommend conducting series of simulation of all possible combinations between various predictive models and sample ratios as a preliminary step in soil organic matter prediction.

关键词： Analysis of variance Agriculture Digital soil mapping Predictive mapping Mediterranean

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impacts of forestation on the annual and seasonal water balance of a tropical catchment under climate change

引用

Forest Ecosystems 2021年第4期8卷 856-871页

作者： Hero Marhaento Martijn J.Booij Noorhadi Rahardjo Naveed Ahmed faculty of forestry Universitas Gadjah MadaYogyakarta 55281Indonesia Water Engineering and management Group Faculty of Engineering TechnologyUniversity of TwenteP.O.Box 2177500 AE Enschedethe Netherlands faculty of Geography Universitas Gadjah MadaYogyakarta 55281Indonesia Key Laboratory of Mountain Surface Process and Ecological Regulations Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China

Background:This study aims to assess the effects of a forestation program and climate change on the annual and seasonal water balance of the Bogowonto catchment(597 km^(2))in Java,*** catchment study is rare example in Indonesia where forestation has been applied at the catchment ***,since the forestation program has been initiated,evaluations of the program only focus on the planting area targets,while the environmental success e.g.,impacts on the hydrological processes have never been *** study used a calibrated Soil and Water Assessment Tool(SWAT)model to diagnose the isolated and combined effects of forestation and climate change on five water balance components,namely streamflow(Q),evapotranspiration(ET),surface runoff(Q_(s)),lateral flow(Q_(l))and base flow(Q_(b)).Results:The results show that from 2006 to 2019,forest cover has increased from 2.7% to 12.8% of the total area,while in the same period there was an increase in the mean annual and seasonal temperature,rainfall,and *** of SWAT simulations show that changes in the mean annual and seasonal water balance under the forestation only scenario were relatively minor,while changes were more pronounced under the climate change only *** on the combined impacts scenario,it was observed that the effects of a larger forest area on the water balance were smaller than the effects of climate ***:Although we found that forestation program has minor impacts compared to that of climate change on the hydrological processes in the Bogowonto catchment,seasonally,forestation activity has decreased the streamflow and surface runoff during the wet season which may reduce the risk of moderate ***,much attention should be paid to the way how forestation may result in severe drought events during the dry ***,we urge the importance of accounting for the positive and negative effects in future forestation programs.

关键词： Forestation Land use change Climate change SWAT model Water balance Bogowonto catchment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：