Arboriculture & Urban Forestry最新文献_第9页

A Survey to Determine the Leaf Nitrogen Concentrations of 25 Landscape Tree Species 25种景观树种叶片氮浓度的调查研究

Arboriculture & Urban Forestry Pub Date : 2001-05-01 DOI: 10.48044/jauf.2001.017

E. Perry, G. Hickman

引用次数: 11

Forest Health Monitoring Protocol Applied to Roadside Trees in Maryland 应用于马里兰州路边树木的森林健康监测方案

Arboriculture & Urban Forestry Pub Date : 2001-05-01 DOI: 10.48044/jauf.2001.015

Anne Buckelew Cumming, Michael F. Galvin, R. Rabaglia, J. Cumming, D. Twardus

引用次数: 29

Measuring Soil Compaction on Construction Sites: A Review of Surface Nuclear Gauges and Penetrometers 建筑工地土壤压实测量:表面核计和穿透计的综述

Arboriculture & Urban Forestry Pub Date : 2001-05-01 DOI: 10.48044/jauf.2001.013

Penetrometers B. Randrup, J. Lichter

引用次数: 27

Using Qualitative Data Collection Methods when Planning for Community Forests 在规划社区森林时使用定性数据收集方法

Arboriculture & Urban Forestry Pub Date : 2001-05-01 DOI: 10.48044/jauf.2001.016

W. Elmendorf

引用次数: 57

Effect of Basement Sump Pump Effluent on the Growth and Physiology of Urban Black Ash and Green Ash Ornamental Trees 地下室水泵污水对城市黑灰和绿灰观赏树木生长和生理的影响

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.009

C. Lait, S. Saelim, J. Zwiazek, Yao Zheng

{"title":"Effect of Basement Sump Pump Effluent on the Growth and Physiology of Urban Black Ash and Green Ash Ornamental Trees","authors":"C. Lait, S. Saelim, J. Zwiazek, Yao Zheng","doi":"10.48044/jauf.2001.009","DOIUrl":"https://doi.org/10.48044/jauf.2001.009","url":null,"abstract":"The effect of basement sump pump effluent discharge in proximity to boulevards and ornamental trees was studied at several sites near Edmonton, Alberta, Canada throughout the summer of 1996. The growth, leaf petiole water potentials, and gas exchange of black ash (Fraxinus nigra) and green ash (F. pennsylvanica) trees were measured at sites with and without nearby sump pump effluent discharge. Black ash trees had higher mortality, altered water relations, and significantly lower caliper increase at the site with sump pump effluent discharge compared to trees at the site without effluent discharge. Green ash trees situated away from sump pump effluent discharge had significantly greater caliper increase than trees situated near effluent discharge. Furthermore, salt injury symptoms were observed on both species of trees located at sites with nearby effluent discharge. Our results demonstrate the importance of monitoring sump pump effluent discharge and its effects on boulevard ornamental trees in areas where soils are poorly drained or contain high levels of salts. It is recommended that basement sump pump effluent discharge hoses should be positioned away from boulevards and ornamental trees.","PeriodicalId":373407,"journal":{"name":"Arboriculture & Urban Forestry","volume":"785 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122999847","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: 5

Biology and Management of the Horned Oak Gall Wasp on Pin Oak 针栎树瘿蜂的生物学及防治

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.012

E. Eliason, D. Potter

{"title":"Biology and Management of the Horned Oak Gall Wasp on Pin Oak","authors":"E. Eliason, D. Potter","doi":"10.48044/jauf.2001.012","DOIUrl":"https://doi.org/10.48044/jauf.2001.012","url":null,"abstract":"The horned oak gall wasp (Callirhytis cornigera) induces large, woody galls on twigs of oak; these galls can disfigure trees and result in extensive branch dieback. This paper reviews our recent research on the pest's biology and management on cultivated pin oaks (Quercus palustris) in Lexington, Kentucky, U.S., especially aspects that are of greatest relevance to tree care professionals. The gall wasp has alternating agamic (all female) and sexual generations that develop, respectively, in multi-chambered twig galls and single-chambered leaf galls along veins. Wasp development required about 33 months in twig galls and about 3 months in leaf galls. The number of gall wasps developing within twig galls ranged from 1 to 160, and was dependent on gall size. Numerous other insects, including parasitoids and inquilines, were found within the galls. Natural enemies accounted for high mortality of C. cornigera, especially in the leaf-galling generation where 70% to 80% of the larvae were parasitized. The dogwood borer (Synanthedon scitula) infested about 15% of the succulent 2- to 3- year-old twig galls. Adult S. scitula moths had a similar, bimodal emergence period regardless of whether they originated from dogwoods or horned oak galls. Insecticidal controls targeting the leaf galling stage of C. cornigera killed the pest, but also its parasitoids. Therefore, no reduction in the number of twig stem galls was achieved. Difficulties in managing this pest in outbreak situations are discussed.","PeriodicalId":373407,"journal":{"name":"Arboriculture & Urban Forestry","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126138932","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: 4

Comparing Formulae that Assess Strength Loss Due to Decay in Trees 比较评估树木因腐烂而造成的强度损失的公式

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.010

B. Kane, Dennis Ryan, David V. Bloniarz

{"title":"Comparing Formulae that Assess Strength Loss Due to Decay in Trees","authors":"B. Kane, Dennis Ryan, David V. Bloniarz","doi":"10.48044/jauf.2001.010","DOIUrl":"https://doi.org/10.48044/jauf.2001.010","url":null,"abstract":"Hazard trees are a concern for anyone who manages trees in a landscape setting, including arborists, urban foresters, and grounds managers. Through research, experience, observation, and common sense, arborists and urban foresters have identified many risk factors that predispose trees to failure. They have also developed thresholds to help determine the degree of hazard and whether a tree is in imminent danger of failing or needs annual (or more frequent) inspections. Two critical factors are involved in strength loss assessment in tree stems with defects. First, it is important to know how much strength is lost due to a defect such as a hollow or cavity. Second, the load required to cause failure needs to be considered since the wood of some trees is inherently stronger than others. Research currently underway at the University of Massachusetts, U.S., intends to test the strength loss due to decay in tree stems. Eventually, once the methodology has been refined, other tree structural defects will also be tested. A need for such research exists because hazard trees pose an important liability issue and because relatively little quantitative testing has been done to establish thresholds to classify trees as hazardous.","PeriodicalId":373407,"journal":{"name":"Arboriculture & Urban Forestry","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130329459","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: 30

The Influence of Waterlogging on the Establishment of Four Australian Landscape Trees 涝渍对澳大利亚四种景观树种形成的影响

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.007

Karen D. Smith, P. May, G. Moore

引用次数: 13

Four-Year Evaluation of Five Cultivars of Pyrus Calleryana 五种梨属品种四年评价

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.011

J. Kuser, Gary G. W. Robinson, N. Polanin

{"title":"Four-Year Evaluation of Five Cultivars of Pyrus Calleryana","authors":"J. Kuser, Gary G. W. Robinson, N. Polanin","doi":"10.48044/jauf.2001.011","DOIUrl":"https://doi.org/10.48044/jauf.2001.011","url":null,"abstract":"In November 1995, five cultivars of Callery pear (Pyrus calleryana: 'Aristocrat', 'Capital', 'Chanticleer', 'Redspire', and 'Whitehouse') were planted within parkinglot traffic islands at Livingston College, a Piscataway campus of Rutgers, The State University of New Jersey, U.S. During the next four years, the trees were observed each spring from bud break to flowering, and again each fall. Measurements of growth patterns as well as observational attributes of the cultivars were recorded. 'Aristocrat' flushed growth a few days earlier than the others, occasionally suffering frost damage to flowers. Its vertical growth was slower when compared to the other cultivars, with a wider branch angle, a distinctly lower, broader crown, and a deep purple-red fall color in contrast to the orange-reds of the other cultivars. 'Aristocrat' was the only cultivar in the study to display branch angle attachments necessary for storm resistance and growth success. 'Chanticleer' grew the fastest of the five and had the narrowest branch angles. 'Redspire' was intermediate in growth, somewhat open, with fairly narrow branch angles. 'Capital' and 'Whitehouse' were comparatively dense and heavy blooming; it was difficult to distinguish between them.","PeriodicalId":373407,"journal":{"name":"Arboriculture & Urban Forestry","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125336963","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: 5

Carbon Storage by Utility-Compatible Trees 公用事业兼容树木的碳储存

Arboriculture & Urban Forestry Pub Date : 2001-03-01 DOI: 10.48044/jauf.2001.008

Andra D. Johnson, H. Gerhold

{"title":"Carbon Storage by Utility-Compatible Trees","authors":"Andra D. Johnson, H. Gerhold","doi":"10.48044/jauf.2001.008","DOIUrl":"https://doi.org/10.48044/jauf.2001.008","url":null,"abstract":"Urban trees can favorably affect factors underlying global warming by storing carbon and by reducing energy needed for cooling and heating buildings. To estimate the amount of carbon stored by smaller types of urban trees, excluding leaves and roots, standardized measurements were taken to determine wood density, wood volume, and dry weight of selected samples of Amelanchier, Malus, Pyrus calleryana, and Syringa reticulata cultivars. Wood density as defined by specific weight ranged from 0.53 to 0.64 g/cm3 for all genera. Densities at two upper trunk positions were significantly different from those at the base. The wood density of Syringa reticulata was significantly less than the other genera. Regression analyses of wood weight based on height and diameter of trees up to 12 cm (4.7 in.) dbh indicated a linear relationship in Amelanchier, but curvilinear (not linear) equations explained more of the variation in Malus and Pyrus. Smaller trees, those 2.3 to 4.9 cm dbh, typically stored between 2.1 and 2.3 kg of carbon in trunks and branches; trees between 5.0 and 7.9 cm stored between 8.4 and 15.1 kg, and trees larger than 8.0 cm up to 11.7 cm stored between 24.5 and 37.5 kg of carbon. The narrow-crowned Pyrus calleryana 'Capital' stored considerably lower amounts of carbon than the other Pyrus calleryana cultivars. These estimates may be increased by 22% to add carbon stored in roots, according to other studies.","PeriodicalId":373407,"journal":{"name":"Arboriculture & Urban Forestry","volume":"3 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131605916","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: 9

Arboriculture &amp; Urban Forestry最新文献

Arboriculture & Urban Forestry最新文献