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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: Forestry × Author: Gupta, Heena × End date: 2016 × Start date: 2016 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Studies on Lannea coromandelica (Houtt.) Merr. wood characteristics using plant extracts as biopreservatives
    (YSPU, 2016) Gupta, Heena; Sharma, K.R.
    The present investigation entitled “Studies on Lannea coromandelica (Houtt.) Merr. wood characteristics using plant extracts as biopreservatives” was carried out in the Department of Forest Products, College of Forestry, UHF Campus, Nauni, Solan (H.P.). The wood samples of Lannea coromandelica (Houtt.) Merr. of size 5cm x 2.5cm x 2.5cm (longitudinal x radial x tangential) were prepared. These wood samples were dip treated in control, 0.25%, 0.5%, 1%, 1.5% and 2 % (w/v) plant extracts of Lantana camaraL. and Ageratum conyzoidesL. 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 anduntreated 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, hromium 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 vitromycelial growth of Polyporussp., per cent fungal growth on plant extracts and Chromium treated wood samples, per cent fungal inhibition by plant extracts and Chromium treated wood samples, ecay test for 2 months and three months period and qualitative and quantitative enzyme assays. The maximum value of specific gravity was recorded at 2.00 per cent concentration. The maximum swelling and rinkage of wood samples have been recorded for tangential plane followed by radial and longitudinal planes. The highest volumetric swelling and shrinkage coefficient, were observed for Ageratum conyzoides L. at T (2.00%) and control respectively. 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 Lantana camaraL. The treated samples have shown improved anti-swelling 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 Chromium retention in wood increased (upto 1%) and was found maximum for Ageratum conyzoidesL. reated samples where, petroleum ether was usedas a solvent. More variation in swelling and shrinkage after Chromium absorption was observed in Lantana camara L. treated wood samples. The treated wood samples have shown more fixation of Chromium trioxide over untreated samples. The maximum funguscolonization was observed in untreated samples. The decay test upto 3 months showed more weight loss ascompared to 2 months. The treatment of samples at higher concentrations where, petroleum ether was used as a solvent proved to be effective in protection against the fungal degradation. Quantitative and qualitative analysis indicated that the fungus was capable of producing cellulase, xylanase and laccase enzymes showing its capability of degreading the wood.