Bt. COTTON PRODUCTIVITY AS INFLUENCED BY FERTIGATION USING SOLID SOLUBLE FERTILIZERS
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Date
2011
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Mahatma Phule Krishi Vidyapeeth, Rahuri.
Abstract
A field experiment entitled, “Bt. cotton productivity as influenced by fertigation using solid soluble fertilizers” was conducted at Post Graduate Research Farm, Interfaculty Department of Irrigation Water Management, Mahatma Phule Krishi Vidyapeeth, Rahuri (Maharashtra) during the year 2009. The experiment was laid out in Randomized Block Design with nine treatments including surface irrigation as control replicated thrice. There were two sources of fertilizers (water soluble fertilizers and conventional fertilizer). Two spacing in paired row planting (0.75 -1.5 m x 0.75 m and 0.9 x 1.8 m x 1.05 m). Three levels of fertilizers (75, 100 and 125 per cent RD of WSF of cotton) and three schedules A, B and schedule C used for apportioning of fertilizers. The soils of experimental field was Inceptisols moderately alkaline in reaction (pH 8.03) with 70 cm depth. The required quantity of irrigation water through drip was computed on the basis of CPE, pan factor and crop coefficient. The plots were irrigated at alternate days through drip for both sources of fertilizers and 75 mm CPE in the surface method treatments. The biometrical observations viz., (Plant height, leaf area, monopodium and sympodium branches per plants) were higher in paired row planting with recommended dose of WSF having spacing 0.75 – 1.5 m x 0.75 m. Treatment T8 showed higher values of all parameters than all the treatments including CF and normal planting. The fertilizer application @ 125 per cent of RD of WSF with 0.75- 1.5 m x 0.75 m spacing (T8) showed the best effect for yield and quality than normal planting and all other treatments. Drip method of irrigation resulted into 59.12 and 55.18 per cent more seed cotton and cotton seed yield than the conventional method of irrigation. Similarly, the yield of seed cotton and cotton seed was 17.17 and 16.53 per cent more in WSF than CF.
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