Thumbnail Image

Thesis

Browse

20162
 Reset filters

Settings

Subject: Silviculture ×

Search Results

Now showing 1 - 2 of 2
  • Thumbnail Image
    ThesisItemOpen Access
    Changes in the population structure, growing stock and physico-chemical properties of soil in different deodar forests of Garhwal Himalaya: a revisitation study over 15 years
    (College of Forestry, Ranichauri campus, V.C.S.G Uttarakhand University of Horticulture and Forestry, 2016-07) Ramola, Gaurav Chand; Khanduri, Dr.V.P.
    Cedrus deodara is a majestic evergreen tree distributed in the Mediterranean region and the western Himalayas. It is native to the western Himalayas mainly in Afghanistan, Northern Pakistan, Northern India (Himachal Pradesh and Uttarakhand) and South-western (mostly Tibet and Western Nepal) occurring at 1,500–3,200 m (4,921–10,499 ft) altitude. It is a large evergreen coniferous tree reaching 40–50 m (131–164 ft) tall, exceptionally 60 m (197 ft) with a trunk up to 3 m (10 ft) in diameter. It has a conical crown with level branches and drooping branchlets. Total area under Deodar forest in India is estimated to be about 203263 ha. In 2000, Bhatt et al. studied the five different forests of deodar at five sites namely Ghimtoli, Dhanolti, Dewarkhal, Devidhar and Jhandidhar in order to know the population structure, growing stock and physico-chemical properties of soil. The present study was also conducted on the same sites mentioned above by recognizing GPS location of the earlier study as the re-visitation study, which was aimed to understand the changes in population structure, growing stock and the various physico-chemical characteristics of soil of Cedrus deodara forests of Garhwal Himalayas over a period of 15 years. The changes in population structure, growing stock and physico-chemical properties of soil over 15 years, assessed by laying out five 0.1 ha sample plots randomly on each location. Enumeration of trees for volume, population structure and growing stock variation was done by measuring girth and height individually for all the tress in the sample plots. Further, data collected from stand were computed for dbh, basal area, volume, stand density and Total Basal Cover. The GSVD (growing stock volume density) were examine for variation of growing stock and percentage relative density was use for the analysis of population structure. The composite soil samples were collected from each sample plot at three different soil depths. The standard method was used to analyzed the soil sample. To study the Physico-chemical properties of soil various parameter viz. Soil organic carbon, available phosphorus, available potassium, pH and moisture content % was analyzed. The outcome of the study revealed that the values of dbh, basal area, height, volume, stand density and TBC ranged from 42.32 to 51.70 cm, 1.49 to 2.02 m2 trees-1 , 27.05 to 38.33 m, 1.60 m3 tree-1 to 3.51 m3 tree-1, 344 to 420 ind. ha-1 and 53.22 to 79.61 m2/ha, respectively. The maximum values of growing stock was recorded in Dewarkhal (Uttarkashi) (1132.85±87.19 m3 /ha), which was followed by Jhandidhar (Pauri) 928.81±28.04 m3 /ha, Dhanolti (Tehri Garhwal) 823.32±79.90 m3 /ha, Ghimtoli (Rudraprayag) 619.55±71.59 m3 /ha and minimum was recorded in Devidhar (Rudraprayag) 515.37±87.19 m3 /ha. The maximum (37 %) population was observed in Dhanolti site under 50-60 cm diameter class, compared to all other sites. Values of soil organic carbon, available phosphorus, available potassium, pH and moisture content % ranged between 0.24 to 0.68 %, 7.76 to 64.21 kg/ha, 63.5 kg/ha to 406.6 kg/ha, 5.07 to 5.87, 14.72 % to 41.99 % respectively. On the basis of field and analytical findings, it may be concluded that healthy growth of stand structure was observed in the forest of Dewarkhal and Jhandidhar. The population structure study observed in different Deodar forest was from young to mature growth in trees in natural forests. Dhanolti , Ghimtoli and Devidhar site showed the maximum percent of population than all other the sites in middle diameter classes .Soil nutrient were found decreases with increasing soil depth. pH was slightly acidic in all sites.
  • Thumbnail Image
    ThesisItemOpen Access
    Autotoxicity against seed germination, seedling emergence and survival of Quercus leucotrichophora A. Camus. Ex. Bahadur
    (College of Forestry, Ranichauri, V.C.S.G. Uttarakhand University of Horticulture and Forestry., 2016-06) Dabral, Aman; Khanduri, Dr. V. P.
    The present study deals with parameter that could influence early recruitment including germination and seedling growth with emphasis on the establishment of Quercus leucotrichophora in Garhwal Himalaya, because plant secondary compounds (terpenoides and or phenolic compounds) may direct competition. Other parameters like burying depth, light availability and root pruning could also influence seed germination and seedling growth. The present study was carried out during year 2014-15 in the research block of Department of Forestry, V.C.S.G. Uttrakhand University of Horticulture and Forestry, Ranichauri, Tehri Garhwal, Uttarakhand. Autotoxicity study in different plant part extracts concentration in laboratory and nursery, different depth in nursery, root pruning at different length from collar region in nursery were conducted to present study. Germination of seed under beneath of different canopy covers was also studied. In this experiment, germination %, mean germination time, germination index radical length were taken in laboratory while in nursery, germination %, mean germination time, germination index, different growth attributes and biomass estimation was done by giving different plant part extract treatments. In natural forest seed was sowed under different canopy cover. The result revealed that seed germination was not varied by different plant part extract treatments. But growth and biomass allocation were higher in plant part extract concentration as compared to control. Result on seed burying at different depth seed germination, growth attributes and biomass allocation were maximum in seed buried at shallower depth and minimum at deeper depth. In root pruning treatment, root pruned at 7 cm length from collar region shows maximum biomass allocations and more growth performance than severe root pruning and control. Light intensity having profound effect on seed germination. Hence present study showed that different parameter viz, autotoxicity, burying depth, root pruning and light availability could influence seed germination and growth of Q. leucotrichophora.