INFLUENCE OF MOISTURE CONSERVATION AND NUTRIENT MANAGEMENT PRACTICES ON SOIL MOISTURE CONTENT, SOIL NUTRITIONAL STATUS AND FIBRE QUALITY OF BT COTTONS.A. Jaybhay, B.A. Shinde2, M.S. Khakre and G.M. Kote
A field experiment was conducted at Cotton research unit, Dr. P.D.K.V. Akola during kharif season of 2007- 08, to find out the effect of different soil moisture conservation measures (M1: opening of alternate furrows in last intercultural, M2: Intercropping of cotton with black gram and M3: Mulching with wheat straw mulch @ 5 t/ha at 45 DAS) and integrated nutrient management practices (N1: RDF-50:25:25 kg NPK/ha, N2: 75% RDF+25% FYM, N3: 75% RDF+25% vermicompost, N4: 50% RDF+50% FYM, N5: 50% RDF+50% vermicompost and N6: RDF+ Micronutriments Zn, Fe, B) on soil moisture content, soil nutrient status, nutrient uptake, fertilizer use efficiency and fibre qualities of Bt cotton hybrid cv. Bunny. The experiment was laid out in a split plot design and replicated thrice. Mulching with wheat straw mulch @ 5 t/ha recorded significantly highest soil moisture content (%) than opening of alternate furrows in last interculture and Intercropping of cotton with black gram, at different crop growth stages. In case of INM practices 50% RDF+50% FYM recorded significantly highest soil moisture content (%) and it was at par with 75% RDF+25% FYM, 75% RDF+25% vermicompost and 50% RDF+50% vermicompost. Intercropping of cotton with black gram recorded significantly highest available nitrogen (203.95 kg/ha), available phosphorus (21.02 kg/ha) and available potassium (495.05 kg/ha). In nutrient management practices, available nitrogen (205.92 kg/ ha), phosphorus (22.46 kg/ha) and potassium (495.61 kg/ha) was significantly highest in RDF+ mi cronutrient Zn, Fe and B and it was at par with the treatment RDF (50:25:25 kg NPK/ha). Nitrogen uptake was not significantly influenced due to moisture conservation measures however, uptake of phosphorus (7.49 kg/ ha) and potassium (19.54 kg/ha) by crop was significantly superior in intercropping of cotton with black gram than rest of the treatments except for uptake of potassium it was at par with wheat straw mulch (19.16 kg/ha). RDF+ micronutrients Zn, Fe and B recorded significantly highest nitrogen (16.39 kg/ha), phosphorus (8.15 kg/ha) and potassium uptake (20.19 kg/ha) and it was at par with RDF- 50:25:25 kg NPK/ha and 75% RDF+25% vermicompost. Fibre qualities were not influenced due to soil moisture conservation and nutrient management practices.
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