CLONAL VARIATION IN PHYSICAL, ANATOMICAL AND CHEMICAL PROPERTIES OF WOOD IN Eucalyptus

Simple item page
dc.contributor.advisorJadeja, D. B.
dc.contributor.authorBehera, L. K.
dc.date.accessioned2017-11-22T09:01:05Z
dc.date.available2017-11-22T09:01:05Z
dc.date.issued2015-12
dc.description.abstractThe present investigation entitled “Clonal variation in physical, anatomical and chemical properties of wood in Eucalyptus” was carried out at the College of Forestry (ASPEE College of Horticulture and Forestry), Navsari Agricultural University, Navsari, Gujarat, India during 2014-2015. Evaluation trial of Eucalyptus clones representing 29 clones collected from Pragati Biotech, Punjab; ITC Bhadrachalam, Andhra Pradesh and JK Paper Mill Ltd., Gujarat was established during September 2009. This trial was established with 29 clones consisting of three replication following Randomized Block Design (RBD) at the instructional farm, College of Forestry, ACHF, Navsari Agricultural University, Navsari. Out of 29 clones, 20 clones were selected for the present study. Before selection of clones, all the 29 clones were assessed for standing growth and volume. Later, superior 20 clones were chosen for present study to evaluate the clones for physical, anatomical and chemical properties of wood along with growth. All the growth status and physical, anatomical and chemical properties of wood were assessed for two different seasons i.e., winter and summer during 2014- 15. Total six ramets per clone were marked in the field trial. For each season, 3 ramets per clone were used and then, those trees were harvested for various observations. The first observations were recorded during winter and subsequent observations were recorded during summer with two separate sets of clones. Further, harvested materials after felling, discs of wood samples at 1m, 3m and 6m from stump height of 30 cm were collected and used for studying various physical, anatomical and chemical properties of different clones. The significant variation was found among 20 clones of Eucalyptus for growth parameters like DBH, mid-diameter, tree height, form quotient and volume. Same trend of variation for each growth parameters was observed during both the seasons of winter and summer. Among the clones growth parameters varied viz. for DBH (11.47 to 16.07 cm during winter and 11.95 to 16.85 cm during summer), for mid-diameter (6.99 cm to 10.57 cm during winter and 7.52 to 11.41 cm during summer), for tree height (18.5 to 23.6 m during winter and 18.77 to 23.86 m during summer), for form quotient (0.58 to 0.71 during winter and 0.60 and 0.72 during summer) and for volume (0.12 to 0.28 m3 winter and 0.14 to 0.32 m3 during summer). Considering both the seasons, clones such as C12 (P2045), C17 (B2253), C4 (P413), C8 (P526), C7 (P498), C16 (SRO16) and C11 (P3020) performed superior for growth attributes over other clones. Important parameters of physical property, specific gravity and moisture content significantly varied among clones for winter and summer seasons whereas other parameters like colour of wood having yellowish sapwood with brownish pink heartwood, medium texture and straight grain found in the maximum clones of Eucalyptus. Specific gravity varied in the range of 0.52 to 0.62 during winter and 0.55 to 0.65 during summer season whereas moisture content was in the range of 59.5 to 80.7 per cent and 61.9 to 80.9 per cent during winter and summer seasons respectively. Clones such as C12 (P2045), C10 (P2155) and C13 (P2069) outperformed the other clones by considering the higher specific gravity and least moisture content during the winter and summer seasons. Fibre dimensions of anatomical property consist of fibre length, fibre diameter, fibre lumen diameter and fibre wall thickness varied significantly among the clones. Same trend of variation for each growth parameter was observed during both the seasons of winter and summer. Range of fibre dimensions viz. fibre length of 793 to 871 µm (during winter) and 797 to 872 µm (during summer), fibre diameter of 11.2 to 13.3 µm (in winter season) and 12.5 to 14.7 µm (in summer season), fibre lumen diameter of 6.03 µm to 7.20 µm (in winter) and 6.22 to 7.35 µm (in summer) and fibre wall thickness of 2.59 to 3.16 µm (during winter) and 3.09 to 3.82 µm (during summer) was recorded. Vessel dimensions of anatomical property consist of vessel length found non-significant whereas vessel diameter and vessel frequency significantly varied among clones of Eucalyptus. Vessel dimensions exhibited vessel length of 283 to 317 µm (during winter) and 288 to 232 µm (during summer), vessel diameter of 87 to 100 µm (during winter) and 90 to 103 µm (during summer) and vessel frequency 12.8 to 14.7 mm-2 (in winter season) and 11.9 to 14.5 mm-2 (in summer season). Considering anatomical properties clones such as C1 (P72), C15 (JK08) and C18 (B2153) showed superiority over rest of clones of Eucalyptus under investigation. Chemical properties of Eucalyptus wood like cellulose, hemicellulose and hemicellulose significantly varied among clones and same trend of variation for both the seasons of winter and summer was discernible. Cellulose ranged from 44.9 to 48.5 per cent in the winter season and 45 to 50.8 per cent during summer season, holocellulose 10.7 to 15.3 per cent during winter season and 12.6 to 16.1 per cent during summer season and holocellulose of 54.6 to 63.1 per cent and 57.6 to 66.9 per cent during winter and summer seasons respectively. On the basis of chemical properties clones such as C6 (P316), C13 (P2069), C15 (JK02) and C20 (B288) performed better as compared to remaining clones. Genetic parameter of growth traits found minimum and maximum for GCV (3.94 and 22.67 %), heritability (0.26 and 0.52) and genetic gain (4.17 and 33.78 %) respectively in tree height and volume. Correlation study for growth traits was positive between volume and DBH, mid-diameter, tree height, form quotient. Among the growth traits, volume contributed highest 35.79 per cent towards genetic divergence. Total 6 number of clusters were formed on the basis of genetic divergence for growth traits and maximum inter cluster distance was found between cluster-IV and cluster-VI (4.99), moreover cluster VI was formed by DBH with highest clonal mean 16.85, followed by tree height with value of 21.99, whereas in cluster V, tree height (clonal mean value of 23.86) contributed more. Therefore, such traits may be used while crossing among the clones belonging to clusters- V and VI. Considering the genetic parameter, correlation and genetic divergence for growth traits clones such as C20 (B288) and C4 (P413) could be selected for tree improvement program. Genetic parameter of wood anatomical traits for heritability and genetic gain was found maximum in specific gravity (0.54 and 5.38 %), moisture content (0.64 and 9.88 %), fibre diameter (0.51 and 6.47 %), fibre lumen diameter (0.52 and 6.67 %) and hemicellulose (0.41 and 7.87 %). Moisture content (6.02 %) and hemicellulose (9.40 %) recorded higher GCV. Correlation study for wood anatomical traits indicates that specific gravity is positively related with cellulose content and negatively related with moisture content. Among the wood anatomical traits, hemicellulose contributed highest 18.42 per cent towards genetic divergence. Total 10 number of clusters were formed on the basis of genetic divergence for wood anatomical traits and maximum inter cluster distance was found between cluster IV and IX (5.34). Based on cluster mean, it is indicated that cluster IV could be superior for specific gravity and moisture content. Similarly, clones belonging to cluster VIII and cluster X could be superior for fibre traits, especially fibre length and holocellulose content, respectively. Considering the genetic parameters, correlation and genetic divergence for wood anatomical traits clones such as C6(P316), C7(P498), C12(P2045), C14(JK08) and C15(JK02) could be selected for future tree improvement program.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810036233
dc.language.isoenen_US
dc.pages165en_US
dc.publisherSILVICULTURE AND AGROFORESTRY DEPT., ASPEE COLLEGE OF HORTICULTURE AND FORESTRY, NAVSARI AGRICULTURAL UNIVERSITY, NAVSARIen_US
dc.subSilviculture and Agroforestryen_US
dc.subjectnullen_US
dc.themePh.D. Thesisen_US
dc.these.typePh.Den_US
dc.titleCLONAL VARIATION IN PHYSICAL, ANATOMICAL AND CHEMICAL PROPERTIES OF WOOD IN Eucalyptusen_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
69121 Behera Laxmikanta.pdf
Size:
23.48 MB
Format:
Adobe Portable Document Format
Description:
Ph.D. Thesis
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Doctoral Theses