Agro fertigational response of sugar mill effluent and synthetic fertilizer (DAP) on the agronomy of crop Vigna unguiculata L. walp in two seasons

Agro fertigational response of sugar mill effluent and synthetic fertilizer (DAP) on the agronomy of crop Vigna unguiculata L. walp in two seasons

2015

E11620

A study was performed under natural environment to assess the agro-fertigational response of Sugar mill effluent (SME) on the crop Vigna unguiculata L. (Cowpea) irrigated with five rates of SME viz. 10, 25, 50, 75 and 100% concentrations; Di-ammonium phosphate (DAP) treatment (applied @100Kg/ha i.e. 0.7g / per 5 Kg) and control Bore well water (BWW) separately in both the Kharif and Zaid seasons for 90 days. Results revealed that irrigation of soil with different concentrations (10, 25, 50, 75, and 100 %) of SME for 90 days resulted in significant (P<0.001) changes in Moisture Content (MC); Electrical Conductivity (EC), pH, chlorides (Cl-), total organic carbon (TOC), exchangeable sodium (Exc. Na+), Available Potassium (Ava. K+), Calcium (Ca2+), Magnesium (Mg2+), Total Kjeldahl\n Nitrogen (TKN), Available Phosphorus (Ava. P), and Sulfate (SO4 2) of soil. The non-significant (P>0.05) changes were observed for Water Holding Capacity (WHC) and Bulk Density (BD) of the soil. DAP treatment fertilized soil significantly (P<0.001) increased EC in Zaid season than BWW, but insignificant than different concentrations of SME in both the seasons. The stimulation in agronomical parameters such as shoot length, root length, number of leaves, flowers, pods, dry weight, fresh weight, chlorophyll content, leaf area index, and crop yield of V. unguiculata were observed to be inversely proportional to the concentrations of SME, with the best results being obtained at a dilution of 50 % of SME concentration after 90 days of SME irrigation than DAP and BWW in both the seasons of Kharif and Zaid.

2(3):5-17, RESEARCH JOURNAL OF AGRICULTURAL AND ENVIRONMENTAL SCIENCES

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