Pub Date : 2016-07-06DOI: 10.4172/2168-9776.1000173
Aghimien Ev, Osho Jsa, S. Hauser, B. Deni, Ade-Oni Vd, Oboite Fo
The development of effective and accurate models to predict forest growth and products is essential for forest managers and planners. Decision-makers need information on the present yield of the forest for the purpose of monitoring growth. Despite the importance of growth and yield models in the determination of appropriate forest management strategies, no study has been undertaken in IITA’s Forest Reserve. Volume equations for predicting tree volume were developed for tree species in IITA’s Forest Reserve. Complete enumeration of trees larger than 5 cm was carried out in fifteen permanent sample plots of size 20 m × 20 m. The data assessed were diameter at base, diameter at middle, diameter at top, diameter at breast height and total height for 1214 tree species. All trees encountered in each plot were identified with their botanical names. The results revealed that there were 34 important tree species distributed among 23 families in the reserve. The most abundant tree species is Newbouldia laevis while the family with the highest number of species is Moraceae with six species. The number of observations per species ranged from 1 to 255 while the diameter at breast height ranged from 5.00 cm to 201.20 cm and highest percentage of the trees belong to the least diameter class (5-9 cm). The volume equations were fitted for individual species greater than or equal to five and all species combined. The assessment criteria coefficient of determination (R2), Standard error of estimate (SEE) with the validation results (using simple linear regression equation, percentage bias and probability plots of residuals) show that the model of logarithm transformed diameter at base and logarithm transformed total height was of good fit. Very high R2 values, small SEE and percentage biases were obtained. The model was discovered to be very adequate for tree volume estimation in the study area. It is therefore recommended for further use in this ecosystem and in any other forest ecosystem with similar site condition.
{"title":"Growth and Yield Models for Uneven-Aged Secondary Forest in IITA,Ibadan, Nigeria","authors":"Aghimien Ev, Osho Jsa, S. Hauser, B. Deni, Ade-Oni Vd, Oboite Fo","doi":"10.4172/2168-9776.1000173","DOIUrl":"https://doi.org/10.4172/2168-9776.1000173","url":null,"abstract":"The development of effective and accurate models to predict forest growth and products is essential for forest managers and planners. Decision-makers need information on the present yield of the forest for the purpose of monitoring growth. Despite the importance of growth and yield models in the determination of appropriate forest management strategies, no study has been undertaken in IITA’s Forest Reserve. Volume equations for predicting tree volume were developed for tree species in IITA’s Forest Reserve. Complete enumeration of trees larger than 5 cm was carried out in fifteen permanent sample plots of size 20 m × 20 m. The data assessed were diameter at base, diameter at middle, diameter at top, diameter at breast height and total height for 1214 tree species. All trees encountered in each plot were identified with their botanical names. The results revealed that there were 34 important tree species distributed among 23 families in the reserve. The most abundant tree species is Newbouldia laevis while the family with the highest number of species is Moraceae with six species. The number of observations per species ranged from 1 to 255 while the diameter at breast height ranged from 5.00 cm to 201.20 cm and highest percentage of the trees belong to the least diameter class (5-9 cm). The volume equations were fitted for individual species greater than or equal to five and all species combined. The assessment criteria coefficient of determination (R2), Standard error of estimate (SEE) with the validation results (using simple linear regression equation, percentage bias and probability plots of residuals) show that the model of logarithm transformed diameter at base and logarithm transformed total height was of good fit. Very high R2 values, small SEE and percentage biases were obtained. The model was discovered to be very adequate for tree volume estimation in the study area. It is therefore recommended for further use in this ecosystem and in any other forest ecosystem with similar site condition.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"1 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85151630","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}
Pub Date : 2016-07-06DOI: 10.4172/2168-9776.1000168
Chaurasia Sk, S. Sp, S. Naithani, P. Srivastava
Information on the basic properties of Melocanna baccifera (Roxb.) Kurz (Muli bamboo), particularly for pulp and papermaking, is very limited. Since many bamboo species remain unutilized, research is needed to determine their properties so that appropriate technologies could be developed to exploit them. One of such properties which affect the suitability of the species as a pulping material is the proximate chemical composition, which was investigated in a study on Melocanna baccifera (Muli bamboo), the most common bamboo from North Eastern India. Fifty mature culms of M. baccifera were obtained from Forest of Silchar, Cachar District of Assam, India. Samples taken from the top, middle and basal portions were thoroughly mixed and used in the study. Determination of proximate chemical analysis was based on TAPPI methods.
{"title":"A Comprehensive Study on Proximate Chemical Composition of Melocanna baccifera (Muli Bamboo) and it's Suitability for Pulp and Paper Production","authors":"Chaurasia Sk, S. Sp, S. Naithani, P. Srivastava","doi":"10.4172/2168-9776.1000168","DOIUrl":"https://doi.org/10.4172/2168-9776.1000168","url":null,"abstract":"Information on the basic properties of Melocanna baccifera (Roxb.) Kurz (Muli bamboo), particularly for pulp and papermaking, is very limited. Since many bamboo species remain unutilized, research is needed to determine their properties so that appropriate technologies could be developed to exploit them. One of such properties which affect the suitability of the species as a pulping material is the proximate chemical composition, which was investigated in a study on Melocanna baccifera (Muli bamboo), the most common bamboo from North Eastern India. Fifty mature culms of M. baccifera were obtained from Forest of Silchar, Cachar District of Assam, India. Samples taken from the top, middle and basal portions were thoroughly mixed and used in the study. Determination of proximate chemical analysis was based on TAPPI methods.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"56 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79834088","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}
Pub Date : 2016-07-06DOI: 10.4172/2168-9776.1000170
R. Maiti, H. Rodríguez, N. C. Sarkar, A. Kumari
The leaves of trees and shrubs possess various chemical components such as leaf pigments, epicuticular wax and various macro and micronutrients. These components influence the growth, development and productivity and adaptation of the species to environments. The results of studies undertaken on the more than 30 woody species in North-eastern Mexico results reveal that there exist large variations in pigments (chlorophyll, carotenoids), epicuticular wax and macro and micro nutrients Several species have been selected with high values of the pigments, epicuticular wax and various macro and micronutrients. For example, species with high Chlorophyll a were: Ebenopsis ebano (1.755), Cercidium suveoleon (0.589), Amyrys texana (1.66), and those with high chlorophyll b were Ebenopsis ebano (0.398), Amyrys texana (1.66) and species with high Chlorophyll total (Chl a + b) were: Ebenopsis ebano (2.253), Leucaena leucocephala (1.687). Species with high carptenoids were: Berberis chococo (0.585), Diospyros palmeri (0.433. The species showing high epicuticular wax load are Forestiera angustifolia (702.04 μg/cm2), Diospyros texana (607.65 μg/cm2), Bernardia myricifolia (437.53 μg/cm2). There is a here is a need to conform the efficiency of these selected species for productivity and adaptation of the species to environment.
{"title":"Biodiversity in Leaf Chemistry (Pigments, Epicuticular Wax and Leaf Nutrients) in Woody Plant Species in North-eastern Mexico, a Synthesis","authors":"R. Maiti, H. Rodríguez, N. C. Sarkar, A. Kumari","doi":"10.4172/2168-9776.1000170","DOIUrl":"https://doi.org/10.4172/2168-9776.1000170","url":null,"abstract":"The leaves of trees and shrubs possess various chemical components such as leaf pigments, epicuticular wax and various macro and micronutrients. These components influence the growth, development and productivity and adaptation of the species to environments. The results of studies undertaken on the more than 30 woody species in North-eastern Mexico results reveal that there exist large variations in pigments (chlorophyll, carotenoids), epicuticular wax and macro and micro nutrients Several species have been selected with high values of the pigments, epicuticular wax and various macro and micronutrients. For example, species with high Chlorophyll a were: Ebenopsis ebano (1.755), Cercidium suveoleon (0.589), Amyrys texana (1.66), and those with high chlorophyll b were Ebenopsis ebano (0.398), Amyrys texana (1.66) and species with high Chlorophyll total (Chl a + b) were: Ebenopsis ebano (2.253), Leucaena leucocephala (1.687). Species with high carptenoids were: Berberis chococo (0.585), Diospyros palmeri (0.433. The species showing high epicuticular wax load are Forestiera angustifolia (702.04 μg/cm2), Diospyros texana (607.65 μg/cm2), Bernardia myricifolia (437.53 μg/cm2). There is a here is a need to conform the efficiency of these selected species for productivity and adaptation of the species to environment.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"100 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75458696","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}
Pub Date : 2016-06-17DOI: 10.4172/2168-9776.1000183
H. Rodríguez, R. Maiti, A. Kumari
The present paper make a synthesis of a comparative leaf anatomy including leaf surface, leaf lamina, petiole and venation as well as wood anatomy of 30 woody species of a Tamaulipan Thorn Scrub, Northeastern Mexico. The results showed a large variability in anatomical traits of both leaf and wood anatomy. The variations of these anatomical traits could be effectively used in taxonomic delimitation of the species and adaptation of the species to xeric environments. For example the absence or low frequency of stomata on leaf surface, the presence of long palisade cells, and presence of narrow xylem vessels in the wood could be related to adaptation of the species to drought. Besides the species with dense venation and petiole with thick collenchyma and sclerenchyma and large vascular bundle could be well adapted to xeric environments. It is suggested that a comprehensive consideration of leaf anatomy (leaf surface, lamina, petiole and venation) and wood anatomy should be used as a basis of taxonomy and drought resistance.
{"title":"Research Advances on Leaf and Wood Anatomy of Woody Species of a Tamaulipan Thorn Scrub Forest and its Significance in Taxonomy and Drought Resistance","authors":"H. Rodríguez, R. Maiti, A. Kumari","doi":"10.4172/2168-9776.1000183","DOIUrl":"https://doi.org/10.4172/2168-9776.1000183","url":null,"abstract":"The present paper make a synthesis of a comparative leaf anatomy including leaf surface, leaf lamina, petiole and venation as well as wood anatomy of 30 woody species of a Tamaulipan Thorn Scrub, Northeastern Mexico. The results showed a large variability in anatomical traits of both leaf and wood anatomy. The variations of these anatomical traits could be effectively used in taxonomic delimitation of the species and adaptation of the species to xeric environments. For example the absence or low frequency of stomata on leaf surface, the presence of long palisade cells, and presence of narrow xylem vessels in the wood could be related to adaptation of the species to drought. Besides the species with dense venation and petiole with thick collenchyma and sclerenchyma and large vascular bundle could be well adapted to xeric environments. It is suggested that a comprehensive consideration of leaf anatomy (leaf surface, lamina, petiole and venation) and wood anatomy should be used as a basis of taxonomy and drought resistance.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"42 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2016-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72510379","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}
Pub Date : 2016-06-17DOI: 10.4172/2168-9776.1000181
R. Walker, Swim Sl, Dale W. Johnson, W. W. Miller
Comparison of the burned and unburned portions of a Jeffrey pine stand in the eastern Sierra Nevada that was partially destroyed by a wildfire approximately a half century earlier served as the basis of an investigation intended to provide insight into the direction and pace of unaided recovery from such events in this and similar forest cover types. With Jeffrey pine the predominant species regardless of treatment, lodgepole pine was a secondary component of the overstory in both stand portions but a minor representation of white fir in the unburned portion was absent from the burned acreage. Commensurate with the large difference in age, tree dimensions, basal area, and biomass in the overstory of the burned stand portion were greatly exceeded by those of the overstory in the unburned portion. Tree seedlings and saplings were much more abundant in the burned acreage, with those of Jeffrey pine largely accounting for the disparity. Predominant among shrubs in the understory of the burned stand portion was snowbrush ceanothus with that in the unburned portion consisting of prostrate ceanothus, while among herbaceous species a small quantity of Sandberg bluegrass in the former contrasted against none in the latter. Fine and total fuel loading along with fuel bed depth on the burned substrate were greatly exceeded by those on the unburned substrate, while proportionally, less fine fuels but more of the coarsest ones were found on the former compared to the latter.
{"title":"Recovery Status of a Sierra Nevada Forest Plant Community One-Half Century after Wildfire","authors":"R. Walker, Swim Sl, Dale W. Johnson, W. W. Miller","doi":"10.4172/2168-9776.1000181","DOIUrl":"https://doi.org/10.4172/2168-9776.1000181","url":null,"abstract":"Comparison of the burned and unburned portions of a Jeffrey pine stand in the eastern Sierra Nevada that was partially destroyed by a wildfire approximately a half century earlier served as the basis of an investigation intended to provide insight into the direction and pace of unaided recovery from such events in this and similar forest cover types. With Jeffrey pine the predominant species regardless of treatment, lodgepole pine was a secondary component of the overstory in both stand portions but a minor representation of white fir in the unburned portion was absent from the burned acreage. Commensurate with the large difference in age, tree dimensions, basal area, and biomass in the overstory of the burned stand portion were greatly exceeded by those of the overstory in the unburned portion. Tree seedlings and saplings were much more abundant in the burned acreage, with those of Jeffrey pine largely accounting for the disparity. Predominant among shrubs in the understory of the burned stand portion was snowbrush ceanothus with that in the unburned portion consisting of prostrate ceanothus, while among herbaceous species a small quantity of Sandberg bluegrass in the former contrasted against none in the latter. Fine and total fuel loading along with fuel bed depth on the burned substrate were greatly exceeded by those on the unburned substrate, while proportionally, less fine fuels but more of the coarsest ones were found on the former compared to the latter.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"25 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2016-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74583327","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}
Pub Date : 2016-02-23DOI: 10.4172/2168-9776.1000172
R. Walker, R. M. Fecko, Dale W. Johnson, W. W. Miller
Forest thinnings using cut-to-length and whole-tree harvesting approaches followed by prescription underburning were assessed for their influences over multiple growing seasons on the mineral nutrition of Jeffrey pine (Pinus jeffreyi Grev. & Balf.) on a Sierran site. Specifically examined were foliar and soil elemental concentrations encompassing macronutrients and micronutrients plus Al. Foliar N was higher in thinned stand subunits initially before transitioning to a relatively elevated concentration in the burned portion of either the cut-to-length or wholetree subunits, while higher foliar S in the burned cut-to-length treatment combination was evident in the last two of the six sampling periods. Foliar Mn was usually higher in the burned whole-tree combination while B and Al were often higher in burned stand portions but with less specificity regarding thinning treatment. At mid growing season, N, P, K, S, Fe, and Cu were higher in young needles while Ca, Mn, and Al were so in older ones. Near mid study, mineral soil Ca was higher in the unthinned subunit while Mg, Fe, Mn, Zn, and Cu were higher in unburned stand portions.
{"title":"Mechanized Thinning, Prescribed Fire, and Needle Age Influences on the Mineral Nutrition of Jeffrey Pine: Elemental Concentrations in Foliage and Soil","authors":"R. Walker, R. M. Fecko, Dale W. Johnson, W. W. Miller","doi":"10.4172/2168-9776.1000172","DOIUrl":"https://doi.org/10.4172/2168-9776.1000172","url":null,"abstract":"Forest thinnings using cut-to-length and whole-tree harvesting approaches followed by prescription underburning were assessed for their influences over multiple growing seasons on the mineral nutrition of Jeffrey pine (Pinus jeffreyi Grev. & Balf.) on a Sierran site. Specifically examined were foliar and soil elemental concentrations encompassing macronutrients and micronutrients plus Al. Foliar N was higher in thinned stand subunits initially before transitioning to a relatively elevated concentration in the burned portion of either the cut-to-length or wholetree subunits, while higher foliar S in the burned cut-to-length treatment combination was evident in the last two of the six sampling periods. Foliar Mn was usually higher in the burned whole-tree combination while B and Al were often higher in burned stand portions but with less specificity regarding thinning treatment. At mid growing season, N, P, K, S, Fe, and Cu were higher in young needles while Ca, Mn, and Al were so in older ones. Near mid study, mineral soil Ca was higher in the unthinned subunit while Mg, Fe, Mn, Zn, and Cu were higher in unburned stand portions.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"38 1","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"2016-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90528418","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}
Pub Date : 2016-02-18DOI: 10.4172/2168-9776.1000171
Gawali As, Wagh Rs, Sonawane Cj
A 23 candidate plus trees of Jatropha curcas were selected from the states of Maharashtra, Chhattisgarh and Haryana in India. A total 14 seed traits and growth parameters were measured and their genetic values and correlation was calculated to serve as base information for further tree improvement and breeding program of J. curcas. Significantly treatment sum of squares were observed for all these traits under the study indicating an existence of a substantial variability revealed high PCV and GCV values for number of branches, number of primary branches, initial collar diameter of plant and seed yield per plant. The PCV values were higher than GCV values for all the traits, while the difference between PCV and GCV magnitude were minimum for number of seeds per fruit. High heritability was observed for number secondary branches and seed yield per plant with high genetic advance. These traits may be considered for selection and improvement of Jatropha accessions/genotypes. Positive and significant correlation exists between number of fruit per plant, number seed per fruit, 100 seed weight and seed yield. Accessions RJ-88, RJ-90, RJ-92, RJ-93, RJ- RJ-123, RJ-124 and RJ- 133 showed above average higher values for growth and seed traits attributes (viz. number of secondary branches, number of fruits per plant, 100 seed Test weight, shelling percentage, oil content and seed yield per plant. Identified promising genotype with favorable traits for future establishment of elite seedling seed orchard for varietal and hybridization programme of tree.
{"title":"Genetic Variability in Growth and Seed Traits of Jatropha curcas L.Germplasm for Genetic Tree Improvement","authors":"Gawali As, Wagh Rs, Sonawane Cj","doi":"10.4172/2168-9776.1000171","DOIUrl":"https://doi.org/10.4172/2168-9776.1000171","url":null,"abstract":"A 23 candidate plus trees of Jatropha curcas were selected from the states of Maharashtra, Chhattisgarh and Haryana in India. A total 14 seed traits and growth parameters were measured and their genetic values and correlation was calculated to serve as base information for further tree improvement and breeding program of J. curcas. Significantly treatment sum of squares were observed for all these traits under the study indicating an existence of a substantial variability revealed high PCV and GCV values for number of branches, number of primary branches, initial collar diameter of plant and seed yield per plant. The PCV values were higher than GCV values for all the traits, while the difference between PCV and GCV magnitude were minimum for number of seeds per fruit. High heritability was observed for number secondary branches and seed yield per plant with high genetic advance. These traits may be considered for selection and improvement of Jatropha accessions/genotypes. Positive and significant correlation exists between number of fruit per plant, number seed per fruit, 100 seed weight and seed yield. Accessions RJ-88, RJ-90, RJ-92, RJ-93, RJ- RJ-123, RJ-124 and RJ- 133 showed above average higher values for growth and seed traits attributes (viz. number of secondary branches, number of fruits per plant, 100 seed Test weight, shelling percentage, oil content and seed yield per plant. Identified promising genotype with favorable traits for future establishment of elite seedling seed orchard for varietal and hybridization programme of tree.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"110 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2016-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75927978","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}
Pub Date : 2016-01-21DOI: 10.4172/2168-9776.1000167
R. Walker, Swim Sl, R. M. Fecko, Dale W. Johnson, W. W. Miller
Thinning implemented with a cut-to-length harvesting system coupled with on-site slash mastication and redistribution and followed by prescribed under burning were assessed for their impacts on the shrub understory and natural regeneration in an uneven-aged Sierra Nevada mixed conifer stand. Initial suppression of the cover and weight of huckleberry oak, the most prevalent ground cover species, by the combined thinning and mastication operations and those of prostrate ceanothus by the under burn were followed by a pronounced resurgence in abundance for both species in burned stand portions, particularly where thinning had preceded the fire. White fir was most prevalent initially among species represented in the seedling size class of natural regeneration and became predominant thereafter while this species dominated the sapling class throughout the study. White fir seedling establishment was enhanced where the mechanized operations were excluded, and especially so where fire was as well, and such was also the case for incense-cedar initially but its seedling abundance declined precipitously as the study progressed. White fir saplings were most numerous in the unthinned stand subunit but the under burn proved lethal to many of them therein. Jeffrey and sugar pine were little represented among seedlings and absent altogether among saplings.
{"title":"Responses of a Sierran Mixed Conifer Understory Plant Community toOver Story Thinning, Slash Mastication, and Prescribed Fire RestorationTreatments","authors":"R. Walker, Swim Sl, R. M. Fecko, Dale W. Johnson, W. W. Miller","doi":"10.4172/2168-9776.1000167","DOIUrl":"https://doi.org/10.4172/2168-9776.1000167","url":null,"abstract":"Thinning implemented with a cut-to-length harvesting system coupled with on-site slash mastication and redistribution and followed by prescribed under burning were assessed for their impacts on the shrub understory and natural regeneration in an uneven-aged Sierra Nevada mixed conifer stand. Initial suppression of the cover and weight of huckleberry oak, the most prevalent ground cover species, by the combined thinning and mastication operations and those of prostrate ceanothus by the under burn were followed by a pronounced resurgence in abundance for both species in burned stand portions, particularly where thinning had preceded the fire. White fir was most prevalent initially among species represented in the seedling size class of natural regeneration and became predominant thereafter while this species dominated the sapling class throughout the study. White fir seedling establishment was enhanced where the mechanized operations were excluded, and especially so where fire was as well, and such was also the case for incense-cedar initially but its seedling abundance declined precipitously as the study progressed. White fir saplings were most numerous in the unthinned stand subunit but the under burn proved lethal to many of them therein. Jeffrey and sugar pine were little represented among seedlings and absent altogether among saplings.","PeriodicalId":35920,"journal":{"name":"林业科学研究","volume":"81 1","pages":"1-17"},"PeriodicalIF":0.0,"publicationDate":"2016-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74175197","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}
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