1. KAUTIR (Kerala Agricultural University Theses Information and Retrieval)
Permanent URI for this communityhttp://localhost:4000/handle/123456789/1
Browse
4 results
Search Results
Item Nutrient management in turmeric (Carcuma Longa L.) through organic manures(Department of Plantation Crops and Spices, College of Agriculture, Vellayani, 2002) Rakhee, C K; Jayachandran, B KAn experiment was conducted at the Instructional Farm, College of Agriculture, Vellayani during June 2001 to February 2002 to evaluate the effect of organic manures on growth, yield and quality of turmeric grown as an intercrop in coconut garden and to assess the relative efficiency of organic manures as substitute to inorganic fertilizers. The experiment consisted of eleven treatments and three replications laid out in RBD. The organic manures used were FYM, vermicompost, neem cake, green leaves, poultry manure, biogas slurry and coir pith compost. Organic manures were applied on nitrogen equivalent basis. The results of the study revealed that the growth characters, rhizome yield as well as quality aspects like volatile oil content of turmeric were significantly influenced by various organic manures. But harvest index, top yield, curcumin content, soil properties except NPK content were not significantly influenced by various organic manures. In the case of weed biomass also no significant influence was noticed. FYM, vermicompost and coir pith compost performed well in the case of growth characters. Though FYM and coir pith compost maintained their superiority at various growth stages regarding plant height, number of leaves, number of tillers, dry matter production, LAI, LAD, and root: shoot ratio, other organic manures like neem cake,' green leaves, poultry manure and biogas slurry gave comparable results at various stages of growth. Regarding rhizome spread and thickness, coir pith compost performed superior and the superiority was present only during later stages of growth .. In the case of root spread, root length and root volume also coir pith compost was the best treatment. At initial stage of growth maximum root weight was produced by FYM and at later stages coir pith compost performed better. In the case ofCGR and RGR, FYM and vermicompost performed better. In the case of NAR maximum values were produced by vermicompost, green leaves and NPK alone as POP recommendations of KAU. Coir pith compost as the source of organic manure had positive influence on rhizome yield which was on par with FYM. Coir pith compost, vermicornpost and FYM performed better than other treatments in the case of dry turmeric and bulking rate at various stages of growth. Absolute control treatment recorded lower values in the case of growth and yield characters. Quality of turmeric improved with various organic manures. Volatile oil content was highest in the case of coir pith compost treatment and it was on par with POP recommendations of KAU, NPK alone as per POP recommendations of KAU and FYM alone as per POP recommendations ofKAU In the case of residual nutrients high soil NPK values were registered by green leaves. B: C ratio was maximum when coir pith compost was used as the organic manure and it was on par with FYM, vermicompost and poultry manure. The significant impact of organic manures in the current research brings out the suitability of organic manures as a substitute for inorganic fertilizers for successful turmeric cultivation.Item Photosynthetic efficiency, growth, yield and quality of turmeric (Curcuma longa L.) under different shade levels(Department of Horticulture, College of Agriculture, Vellayani, 2000) Joseph Louis; Jayachandran, B KA field experiment was conducted at the College of Agriculture, Vellayani during the period from 1998-' 99 to study the effect of shade on photosynthetic efficiency, partitioning of photosynthates and quality of turmeric (Curcuma longa L.) under different shade levels. The experiment was laid out as split plot design with shade levels of 0, 25, 50 and 75 per cent as main plot treatments and 3 varieties, Kanthi, Alleppey and Sobha as sub plot treatments. The number of replications was four. Artificial shade was provided using high density polyethylene shade nets and calibrated using quantum photosensors. Bimonthly observations of various growth parameters were taken from two months after planting. At s.ix months after planting photosynthetic related parame!ers were recorded. The various growth parameters like number of tillers, dry matter production, crop growth rate, bulking rate and harvest index which contributed to yield was highest under 25 per cent shade. The yield recorded at 25 per cent shade was significantly superior when compared to open, indicating the shade tolerance of the crop. Different shade levels influenced the quality of turmeric rhizomes as determined by the volatile oil content which was maximum under 75 per cent shade level and curcumin content was maximum under 50 per cent shade level. The photosynthetic rate and related parameters like leaf temperature, leaf internal CO2 concentration and stomatal conductance of' turmeric were measured at 6 MAP using leaf chamber analyser. Photosynthetically Active Radiation (PAR) on leaf surface, stomatal conductance, leaf internal CO2 concentration and leaf temperature was high .under open condition. Photosynthetic rate was maximum in plants grown at open condition. Though at 25 per cent shade, the photosynthetic rate was less, the yield was high at this shade level when compared to the open condition. Under open condition there is a possibility of an increase in photo-oxi dation I photo-respiration resulting in the inefficient translocation of photosynthates from the source to the sink. The results indicate that low levels of shade is favourable for growing turmeric to get high rhizome yield and this specific nature of turmeric can be. fully exploited for growing this as an intercrop or as a crop component in homesteads.Item Refinement of in vivo and in vitro pollination techniques in turmeric (Curcuma domestica Val.)(Department of Plantation Crops and Spices, College of Horticulture, Vellanikkara, 2001) Vijayasree, P S; Valsala, P AItem Response of turmeric Curcuma domestic Val. to in vivo and in vitro pollination(Department of Plantation Crops and Spices, College of Horticulture, Vellanikkara, 1999) Renjith, D; Valsala, P A