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20152
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Subject: Forest Product and Utilisation × End date: 2018 × Start date: 2010 ×
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    ThesisItemOpen Access
    Standardization of Nursery Techniques In Sterculia urens Roxb.
    (University of Agricultural Science, Dharwad, 2015-09) Padeppanavar, Sanjeev S.; Manjunatha, G.O.
    A trial was conducted at college of Forestry Sirsi, to standardize the nursery techniques in Sterculia urens Roxb. which is an important vulnerable NTFP tree species. In first trial, ten pre-sowing treatments were tried to study their effect on seed germination parameters. In second trial, two levels of organic manures (FYM and vermicompost), three levels of bio-fertilizers (No bio-fertilizer, Azospirillum and PSB) and three levels of inorganic fertilizers (No NPK, 1:1:1 g NPK and 2:1:1g NPK) were evaluated to know their effect on seedling growth of Sterculia urens. Out of ten pre-sowing seed treatments, the maximum germination percentage (65.3%) was recorded in mechanical scarification with Gibberlic acid (GA3) 250 ppm treatment. The other germination parameters viz., mean daily germination, peak value, germination value and germination rate were also maximum in this treatment. Among the organic manures, application of vermicompost has recorded maximum seedling growth parameters. Among bio-fertilizers, application of PSB has recorded maximum seedling and root growth parameters. Among inorganic fertilizers, application of 2:1:1 g NPK has recorded significantly highest seedling and root growth parameters. Among the interactions of organic manures and bio-fertilizes, combination of vermicompost with PSB has recorded maximum seedling height and collar diameter. The number of leaves, leaf area, fresh shoot weight, fresh root weight, total fresh weight and total root dry weight were maximum in the combination of vermicompost and without biofertilizers. Among the interactions of organic manures and inorganic fertilizers, all the seedling growth parameters were found maximum in the combination of vermicompost with 2:1:1 g NPK. Among the interactions of bio-fertilizers and inorganic fertilizers, all parameters were found maximum in combination of PSB with 2:1:1 g NPK. Among the interactions of organic manures, bio-fertilizers and inorganic fertilizers, combination of vermicompost with PSB and 2:1:1 g NPK has recorded maximum seedling growth parameters.
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    ThesisItemOpen Access
    Effect of Integrated Nutrient Management on Early Growth Performance of Agarwood (Aquilaria Agallocha l.) In Central Western Ghats
    (University of Agricultural Science, Dharwad, 2015-07) Bhat, Rekha Ganapati; Manjunatha, G.O.
    ABSTRACT Tropical tree agarwood (Aquilaria agallocha L.) is the principal source of agar which is one of the most valuable forest products traded internationally. Although this species is the focus of increasing conservation concern, information on their growth, proper management techniques and nutrient requirements are lacking. Keeping in view the importance of this species, drastic decline in natural population, biological conservation and for the success of commercial plantations, a field experiment was conducted to find out suitable combination of nutrients for early growth of agarwood plantations at farmer’s field, Koppa village of Sirsi taluk during 2014-2015. The experiment was laid out in randomized complete block design comprising ten treatments and each treatment was replicated thrice. The treatments included nutrients in the form of organic, inorganic and bio-fertilizers. Among all the treatments the treatment comprises FYM (2 Kg/tree), VAM (100 g/tree), PSB (50 g/tree) and Azospirillum (50 g/tree) showed best performance recording highest tree height, DBH, tree basal area and tree volume i.e., 4.11 m, 4.52 cm, 16.17 cm2 and 6227.90 cm3 respectively at the end of 9 MAT. The lowest among all the growth parameters was recorded in control (T1). Soil pH varied within the range of 5.99 to 6.23, electrical conductivity within 0.2 to 0.48 ds/m, organic carbon in the range of 0.42 to 0.73 per cent; whereas available nitrogen, phosphorous and potassium ranged from with 225-383 Kg/ha, 37.16-44.44 Kg/ha and 144.33-242 Kg/ha respectively among the different nutrient treatments.