Southern Journal of Applied Forestry最新文献_第2页

A Graphical Comparison of Loblolly Pine Growth-and-Yield Models 火炬松生长与产量模型的图解比较

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.10-013

James E. Henderson, S. Roberts, D. Grebner, I. Munn

引用次数: 5

Impact of Harvest-Level Changes on Carbon Accumulation and Timber Stumpage Prices in Mississippi 收获水平变化对密西西比州碳积累和木材立木价格的影响

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.12-020

P. Nepal, Robert K Grala, D. Grebner, R. Abt

{"title":"Impact of Harvest-Level Changes on Carbon Accumulation and Timber Stumpage Prices in Mississippi","authors":"P. Nepal, Robert K Grala, D. Grebner, R. Abt","doi":"10.5849/SJAF.12-020","DOIUrl":"https://doi.org/10.5849/SJAF.12-020","url":null,"abstract":"increased demand for carbon offsets leading to higher carbon prices and, therefore, encourage forest landowners to enter into forest carbon offset contracts. As a result, qualifying forest tracts might be withdrawn from harvest during the contract leading to decreased timber supply in the short term. Timber markets will respond to such a situation with increased timber stumpage prices (Sohngen and Mendelsohn 2003, Stainback and Alavalapati 2002). However, in the long term, timber harvests might increase as carbon contracts are completed allowing landowners to harvest their forests. Consequently, timber stumpage prices would then decrease (Sohngen et al. 2008) assuming that other factors related to timber supply remain unchanged. Potential impacts of implementing carbon policies and programs on timber supply and timber stumpage prices were demonstrated by several studies. Sohngen et al. (2008) analyzed the effect of carbon policy on carbon accumulation and timber supply at the global level using the Dynamic Timber Supply Model. They showed that carbon policy would induce owners of hardwood forests in the southern United States to withhold their forests from harvest in the short term, which would result in increased timber prices. However, they also showed that additional land supply, longer rotations, and improved forest management would increase timber supply in the long term, causing timber prices eventually to fall. In another study, Sohngen and Mendelsohn (2003) indicated that implementation of the least cost strategy (minimizing the present value of the total costs of greenhouse gas damage and its abatement) to control greenhouse gases would result in global carbon sequestration of 102 billion metric tons. During the same time, global timber supply would increase by up to 785 million cubic meters (m) resulting in lower global timber prices in the long term. Other studies indicated that payments for carbon sequestered by forests will lead to longer forest rotations (Nepal et al. 2009, Sohngen et al. 2008, Gutrich and Howarth 2007, Stainback and Alavalapati 2002, van Kooten et al. 1995) and reduced timber supply in the short term (Sohngen et al. 2008, Sohngen and Mendelsohn 2003, Stainback and Alavalapati 2002). Several studies have indicated that current US carbon prices do not pay enough to make forest-based carbon sequestration financially viable (Nepal et al. 2012, Latta et al. 2011, Malmsheimer et al. 2008). Consequently, under current carbon market conditions, landowners are more likely to retain their right to sell timber rather than enroll their forest stands into carbon contracts. However, if the United States implements a mandatory carbon policy, it is expected that demand for carbon will increase leading to higher carbon prices (Green Assets 2012, US EPA 2009) and improved financial viability of forestry-based carbon sequestration strategies (Malmsheimer et al. 2008). This study investigated how future carbon accumulation in Mississi","PeriodicalId":51154,"journal":{"name":"Southern Journal of Applied Forestry","volume":"37 1","pages":"160-168"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5849/SJAF.12-020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70979080","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

Transpirational drying effects on energy and ash content from whole-tree southern pine plantation chipping operations. 蒸腾干燥对南松林整片伐林能量和灰分含量的影响。

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.11-046

Jason B. Cutshall, W. D. Greene, S. Baker

引用次数: 15

Fuel consumption models for pine flatwoods fuel types in the southeastern United States 美国东南部松木燃料类型的燃料消耗模型

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.12-006

C. S. Wright

引用次数: 17

Potential Erosion from Bladed Firelines in the Appalachian Region Estimated with USLE-Forest and WEPP Models 用USLE-Forest和WEPP模型估算阿巴拉契亚地区叶片火线的潜在侵蚀

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.12-021

A. M. Christie, W. M. Aust, S. Zedaker, B. Strahm

引用次数: 10

Longleaf Pine Inner Bark and Outer Bark Thicknesses: Measurement and Relevance 长叶松内树皮和外树皮厚度:测量和相关性

Southern Journal of Applied Forestry Pub Date : 2013-08-01 DOI: 10.5849/SJAF.12-023

T. Eberhardt

{"title":"Longleaf Pine Inner Bark and Outer Bark Thicknesses: Measurement and Relevance","authors":"T. Eberhardt","doi":"10.5849/SJAF.12-023","DOIUrl":"https://doi.org/10.5849/SJAF.12-023","url":null,"abstract":"Measurements of bark thickness generally ignore the fact that bark is comprised of both living inner bark (phloem) and essentially dead outer bark (rhytidome). Discerning between them has ramifications for the utility of bark as a byproduct of timber harvesting and its functionality on a living tree. Inner bark and outer bark thicknesses for longleaf pine (Pinus palustris Mill.) were investigated using disks collected from trees harvested on a 70-year-old plantation. Inner bark thickness was relatively constant up the bole of each tree whereas outer bark thickness rapidly declined from its thickest point at stump height; at relative heights above 20%, the decrease in outer bark thickness was more gradual. The proportion of inner bark, therefore, increased up the bole, from an average of 15% at stump height to above 40% toward the top of the tree. Since inner bark is a richer source of extractives than old outer bark, tree tops may be preferable in terms of bark abundance and quality as feedstock for extractive-based products. Reductions in the inner and outer bark thicknesses on disk drying, with averages of roughly 20 and 10%, respectively, differed when the data were pooled by cardinal direction. Thus, variability in bark thickness around the circumference of a standing tree may actually be a manifestation of differences in bark moisture content.","PeriodicalId":51154,"journal":{"name":"Southern Journal of Applied Forestry","volume":"37 1","pages":"177-180"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5849/SJAF.12-023","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70979166","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: 21

Logging intensity impact on small oak seedling survival and growth on the Cumberland Plateau in northeastern Alabama 伐木强度对阿拉巴马州东北部坎伯兰高原小橡树幼苗存活和生长的影响

Southern Journal of Applied Forestry Pub Date : 2013-05-01 DOI: 10.5849/SJAF.11-003

C. Schweitzer, D. Dey

{"title":"Logging intensity impact on small oak seedling survival and growth on the Cumberland Plateau in northeastern Alabama","authors":"C. Schweitzer, D. Dey","doi":"10.5849/SJAF.11-003","DOIUrl":"https://doi.org/10.5849/SJAF.11-003","url":null,"abstract":"Ground disturbance caused by forest harvest operations can negatively impact oak regeneration. On the Cumberland Plateau, for successful regeneration, managers often must rely on very small (less than a ft in height) oak advance reproduction that is susceptible to disturbance by harvesting equipment. Furthermore, sites on the Plateau top are often harvested when conditions are too wet to permit operations elsewhere, increasing the risk to small seedlings that may be more easily pulled from the moist soil. This study was designed to assess the effect of unrestricted and restricted harvesting equipment traffic on small oak advance reproduction under a clearcutting prescription. A feller-buncher and grapple skidding were used to harvest sites under “free access,” resulting in unrestricted traffic on the sites, or under “trail access,” with restricted site traffic. Six hundred eighty-seven oak seedlings were permanently tagged (preharvest); species, height, and basal diameter were recorded and have been remeasured 1, 2, and 8 years postharvest. Fifty-two percent of the tagged seedlings survived after 8 years. The survival rate for seedlings exposed to restricted traffic did not differ from that for seedlings exposed to unrestricted traffic. No evidence of seedlings being pulled out of the ground was observed. After three growing seasons, there was no significant difference in visual site disturbance between the two treatments. After eight growing seasons, the status of the reproduction suggests that little damage was incurred under unrestricted equipment traffic.","PeriodicalId":51154,"journal":{"name":"Southern Journal of Applied Forestry","volume":"37 1","pages":"113-121"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5849/SJAF.11-003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978638","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

Response of Midrotation Pine Stands to Fertilizer and Herbicide Application in the Western Gulf Coastal Plain 墨西哥湾西部沿海平原中轮松林对化肥和除草剂施用的响应

Southern Journal of Applied Forestry Pub Date : 2013-05-01 DOI: 10.5849/SJAF.11-044

Hal O. Liechty, Conner Fristoe

{"title":"Response of Midrotation Pine Stands to Fertilizer and Herbicide Application in the Western Gulf Coastal Plain","authors":"Hal O. Liechty, Conner Fristoe","doi":"10.5849/SJAF.11-044","DOIUrl":"https://doi.org/10.5849/SJAF.11-044","url":null,"abstract":"Application of nitrogen (N) and phosphorus (P) to midrotation loblolly pine (Pinus taeda L.) stands is a common silvicultural practice used to increase crop-tree volume production in the western Gulf Coastal Plain of Arkansas and Louisiana. Studies in other regions have shown that midrotation herbicide application, with or without an application of fertilizer, can also benefit crop-tree growth. We studied the impact of herbicide (16 oz of imazapyr with 3.2 oz of surfactant ac 1 ), fertilizer (200 lb of N and 35 lb of P ac 1 ), and a combined herbicidefertilizer treatment on pine crop tree and competing woody vegetation growth in three, thinned midrotation stands for 5 years. The density and basal area of woody competition was significantly reduced (73‐78%) with an application of imazapyr, but was not affected by fertilization. The application of imazapyr inhibited height growth of the pine crop trees and without an application of fertilizer had little impact on basal area or volume growth during the 5-year measurement period. Fertilizer application increased merchantable volume growth (21.5‐25.1 ft 3 ac 1 yr 1 ), but response was low compared to that reported for loblolly pine stands elsewhere in the southern United States. Fertilization increased mortality of smaller, less vigorous pine trees. The combined herbicidefertilizer resulted in a 20.5% increase in chip-n-saw volume, suggesting that the larger, more vigorous trees in these stands respond most rapidly to the combined herbicide and fertilizer treatments.","PeriodicalId":51154,"journal":{"name":"Southern Journal of Applied Forestry","volume":"37 1","pages":"69-74"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5849/SJAF.11-044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978957","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: 15

Development of Three Underplanted Hardwood Species 7 Years Following Midstory Removal 三种下层阔叶树种在中层砍伐7年后的发育

Southern Journal of Applied Forestry Pub Date : 2013-05-01 DOI: 10.5849/SJAF.12-001

J. Lhotka, E. Loewenstein

引用次数: 8

Wintering Birds in Intensively Established Pine Plantations of Coastal Plain Mississippi 密西西比沿海平原密集建立的松林中的越冬鸟类

Southern Journal of Applied Forestry Pub Date : 2013-05-01 DOI: 10.5849/SJAF.11-028

B. Hanberry, Phillip Hanberry, S. Riffell, S. Demarais, Jeanne C. Jones

{"title":"Wintering Birds in Intensively Established Pine Plantations of Coastal Plain Mississippi","authors":"B. Hanberry, Phillip Hanberry, S. Riffell, S. Demarais, Jeanne C. Jones","doi":"10.5849/SJAF.11-028","DOIUrl":"https://doi.org/10.5849/SJAF.11-028","url":null,"abstract":"Intensively established pine plantations are an important component of the southeastern US landscape. Because only minimal information exists about how current establishment practices affect wintering birds in managed forests, we documented effects of five pine plantation establishment practices that varied in intensity on wintering birds during years 1 through 5 postestablishment in the Coastal Plain of Mississippi. Using mixed general linear models, we compared species richness, total bird abundance, and individual species abundance. During the first 5 years, species richness and total abundance were greatest in the chemical-only establishment practice, whereas species richness and total abundance were lower in mechanical site preparation establishments with increasingly intensive chemical herbaceous controls. For five common species with treatment effects, abundance generally was greatest in the chemical-only establishment practice and abundance decreased as establishment intensity increased. Increasing stand establishment intensity in mechanical-prepared treatments generally reduced presence of wintering avian species in young pine plantations of the Lower Coastal Plain. Conversely, tree and snag retention facilitated by chemical-only site preparation may enrich avian assemblages in intensively established pine plantations.","PeriodicalId":51154,"journal":{"name":"Southern Journal of Applied Forestry","volume":"37 1","pages":"91-96"},"PeriodicalIF":0.0,"publicationDate":"2013-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.5849/SJAF.11-028","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70978608","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