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Dr. Y. S. Parmar University of Horticulture & Forestry, Solan

Dr. Yashwant Singh Parmar University of Horticulture and Forestry, Solan, was established on 1st December, 1985 with the objective to promote education, research and extension education in the fields of Horticulture, Forestry and allied disciplines. Late Dr. Yashwant Singh Parmar, the first Chief Minister and the architect of Himachal Pradesh perceived the importance of Horticulture and Forestry to develop and improve the State economy which led to the establishment of this University. Its history lies in erstwhile Himachal Agricultural College, Solan, established in 1962 and affiliated to the Panjab University. It became one of the campuses of Agriculture Complex of Himachal Pradesh University on its formation in 1970. Consequent upon the establishment of Himachal Pradesh Krishi Vishvavidyalaya in 1978, this campus became its Horticulture Complex and finally in 1985, assumed the status of a State University, being the only University in the country engaged exclusively in teaching, research and extension in Horticulture and Forestry. The University is located at Nauni in Solan District of Himachal Pradesh, 13 km from Solan on Solan-Rajgarh Road, at an elevation of 1300 metres above mean sea level. Solan town is situated on national highway (NH-22) and is well connected by train and bus services. The University has four constituent colleges, out of which, two are located at the main campus Nauni, one for horticulture and the other for forestry, having 9 and 7 departments, respectively. The third College i.e., College of Horticulture & Forestry is located at Neri in Hamirpur District on Nadaun-Hamirpur state highway, about 6 Km from Hamirpur town and is well connected with bus service. The college offers three Undergraduate Degree Programmes i.e. BSc (Hons.) Horticulture, BSc (Hons.) Forestry and B. Tech. Biotechnology and MSc degree programme in a few subjects. The fourth college i.e. College of Horticulture and Forestry, Thunag (Mandi) is located at Thunag District Mandi. This college offer BSc (Hons.) Horticulture and BSc (Hons.) Forestry degree programme. In addition, there are five Regional Research Stations, 12 Satellite Stations and five Krishi Vigyan Kendras (KVKs) situated in different zones of the State.

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Subject: Forest Products × Author: MEENA, RAJESH KUMAR × End date: 2017 × Start date: 2012 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    STUDIES ON Pinus roxburghii Sargent WOOD CHARACTERISTICS USING PLANT EXTRACTS AS BIOPRESERVATIVES
    (UHF,NAUNI, 2017-11) MEENA, RAJESH KUMAR; DUTT, BHUPENDER
    ABSTRACT The present investigations entitled “Studies on Pinus roxburghii Sargent wood characteristics using plant extracts as biopreservatives” was carried out in the Department of Forest Products, College of Forestry, UHF, Nauni, Solan (H P). The wood samples of Pinus roxburghii Sargent of 5cm x 2.5cm x 2.5cm (longitudinal x radial x tangential) dimensions were prepared and dipped in 0.25per cent, 0.5 per cent, 1 per cent, 1.5 per cent and 2 per cent (w/v) plant extracts of Acorus calamus L. and Parthenium hysterophorus L. for 72 hours. These plant extracts were extracted by using two solvents viz., petroleum ether and methanol solutions. The wood samples were analysed for variation of specific gravity, swelling and shrinkage of wood in three different planes viz., longitudinal, radial and tangential, per cent weight gain of treated and untreated wood on dry weight basis, per cent weight gain of treated and untreated wood on wet weight basis, weight percentage gain, volumetric swelling coefficient, volumetric shrinkage coefficient, anti-swelling efficiency, anti-shrinkage efficiency, chromium absorption, chromium leaching, chromium retention, variation in treated and untreated wood after chromium absorption on dry weight basis (swelling) and wet weight basis (shrinkage), variation in treated and untreated wood after chromium leaching on dry weight basis (Swelling) and wet weight basis (Shrinkage), in vitro mycelial growth of namely Trametes versicolor L. and Gloeophyllum striatum (Fr.) Murrill per cent fungal growth on plant extracts and chromium treated wood samples, per cent fungal inhibition by plant extracts and chromium treated wood samples, decay test for two months and three months, chemical properties of wood after decay test and qualitative and quantitative enzyme assays. The maximum value of specific gravity was recorded at 0.25 per cent concentration. The maximum swelling and shrinkage was recorded in tangential plane followed by radial and longitudinal planes. The highest volumetric swelling was observed for Parthenium hysterophorus L. at T5 (2.00%) and shrinkage coefficient was also recorded for the Parthenium hysterophorus L. at 0.25 per cent concentration. Per cent variation in weight of treated and untreated wood on dry weight basis (swelling) and wet weight basis (shrinkage) were found to be maximum for Acorus calamus L. The treated samples have shown improved antiswelling and anti-shrinkage efficiency over untreated samples. The extract treated wood samples have shown an increased dimensional stability over untreated samples. With increase in plant extract concentration the maximum chromium retention in wood was recorded in treated wood samples and minimum was found at untreated wood samples. Maximum chromium retention was recorded for Acorus calamus L. treated samples with petroleum ether extract. Maximum chromium retention was noticed at 2.00 per cent concentration. Per cent weight highest swelling was observed for the Acorus calamus L. and maximum swelling was recorded at 0.50 per cent concentration and minimum was at 2.00 per cent concentration and highest shrinkage after Chromium absorption was observed in Acorus calamus L. treated wood samples maximum was noticed at 0.25 and 1.50 per cent and minimum was at 2.00 per cent. The treated wood samples have shown more fixation of chromium trioxide than untreated samples. The maximum fungus colonization was observed in untreated samples. The decay test upto three months showed more weight loss than two months. The treatment of samples at higher concentrations with methanol extract was found to be effective in protection against the fungal degradation. Parthenium hysterophorus L. extract was found more effective against the wood degrading fungi as compare to the Acorus calamus L. extract Quantitative and qualitative analysis indicated that the both fungi were able to produce cellulase and xylanase enzymes showing its capability of degrading the wood. The treated wood samples showed higher water soluble extractives, lignin and holocelluloses content than untreated wood samples.