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Title: | Influence of nutrients and plant growth promoting root endophyte (pgpre) on growth and development of Dendrobium cv. Earsakul |
Authors: | Ajithkumar, K Dhineesh, D |
Keywords: | Pomology and Floriculture |
Issue Date: | 2009 |
Publisher: | Department of Pomology and Floriculture, College of Horticulture, Vellanikkara |
Citation: | 172944 |
Abstract: | Investigations on the “Influence of nutrients and Plant Growth Promoting Root Endophyte (PGPRE) on growth and development of Dendrobium cv. Earsakul” was carried out in the orchidarium of All India Co-ordinated Floriculture Improvement Project at the Department of Pomology and Floriculture, College of Horticulture, Vellanikkara, Thrissur, during 2008 to 2009. The specific objective was to study the influence of organic and inorganic nutrients and Piriformospora indica (PGPRE) on the growth and development of Dendrobium cv. Earsakul. Foliar sprays of supernatant liquid of cowdung slurry, inorganic nutrients of N:P2O5:K2O 3:1:1 during vegetative period and 1:2:2 during flowering period @ 0.2 per cent, weekly twice (Package of Practices recommendations of KAU for orchids) along with P. indica resulted in increased growth parameters like number of leaves, number of shoots and internodal length of the plants. However, maximum plant height and girth of the shoots was obtained in the treatment combination Package of Practices (POP) + organic mixture + vermiwash + P. indica + bone meal. Maximum number of roots and root volume was resulted from the treatment combinations of POP along with P. indica. However, maximum root length was recorded in treatment receiving POP + organic mixture at 6 Months after Planting (MAP) and organic mixture + vermiwash + P. indica + bone meal at flower bud formation stage. Physiological parameters like dry matter production, crop growth rate and relative growth rate were promoted by POP along with P. indica application. POP + vermiwash + P. indica + bone meal produced maximum net assimilation rate. Application of POP recommendations resulted in maximum chlorophyll ‘b’ and total chlorophyll content. POP along with bone meal application resulted in maximum chlorophyll ‘a’ content. Early flowering and lengthy spikes were obtained from the treatment receiving POP along with P. indica. The treatment combination POP with vermiwash resulted in increased uptake of Nitrogen at 6 MAP and at the time of flower bud formation. In general, at 6 MAP and at the time of flower bud formation, maximum uptake of Phosphorus was recorded in the treatments POP + bone meal and POP + vermiwash + P. indica + bone meal. During both the periods, POP + organic mixture + P. indica + bone meal resulted in maximum uptake of Potassium. In general, uptake of Calcium and Magnesium was maximum in the treatment receiving POP + vermiwash + P. indica + bone meal during both the stages of growth. Application of organic mixture + vermiwash + P. indica + bone meal along with POP gave beneficial effect on uptake of micro nutrients, viz., Fe, Cu, Zn and Mn.Incidence of pests and diseases was negligible during the entire period of study. |
URI: | http://hdl.handle.net/123456789/1066 |
Appears in Collections: | PG Thesis |
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