Author(s):

Gulshan Kumar Janghel, Tapas Chowdhury, MC Bhambri, SB Gupta, Nitish Tiwari and Ravindra Soni

Abstract: A field study was conducted during Kharif, 2016-17 in Instructional cum Research farm, IGKV, Raipur (Chhattisgarh) in Inceptisols with rainy season rice to evaluate the effect of different combinations of organic manures along with biofertilizers on physico-chemical, chemical, biochemical properties of soil and crop yield. Different chemical and non –chemical weed management techniques were also evaluated to find out their suitability. Three different types of organic manures i.e. FYM, Poultry manure and Vermicompost were mixed in different combinations and applied in field to fulfill the nitrogen requirement of the crop. The results of the investigation revealed that the 50% nitrogen management through FYM, 50% nitrogen management by poultry manure along with application of biofertilizers Azospirillum and PSB was found most effective to improve the physico-chemical, chemical, biochemical properties of soil and crop yield. Under this system the pH of the soil tended towards nutrality. Soil organic carbon was also found at maximum level due to above combination of organic manures. In this experiment a minute increase in soil pH was observed before application of organic manures (initial observation) and harvest of crop. It was also observed a minute increase in soil EC from initial observation i.e. before application of organic manures and at harvest stage of the crop. Comparatively higher soil organic carbon content (SOC) was found in soil at 30 and 50 DAS of crop. A field study was conducted during Kharif, 2016-17 in Instructional cum Research farm, IGKV, Raipur (Chhattisgarh) in an Inceptisols with rainy season rice to evaluate the effect of different combinations of organic manures along with biofertilizers on physico-chemical and chemical properties of soil and crop yield. Different chemical and non –chemical weed management techniques were also evaluated to find out the suitability. Three different types of organic manures i.e. FYM, Poultry manure and Vermicompost were mixed in different combinations. The experiment was laid Split Plot Design with three replications and twelve treatments involving organic manures Azotobacter and along with PSB. The results revealed that significantly highest soil physiological and chemical properties was obtained under FYM (50% N) + Poultry Manure (50%N) + Azospirillum + PSB as compared to FYM (50% N) + Vermicompost (25% N) + Poultry Manure (25% N) +Azospirillum + PSB and FYM (50% N) +Vermicompost (50% N) + Azospirillum + PSB treatments. In this treatments FYM (50% N) + Poultry Manure (50%N) + Azospirillum + PSB is produced significantly maximum soil pH (6.38), soil EC (0.24) and Organic carbon content (0.51) over other treatments. No significant difference in grain yield of scented rice was found among different nutrient management practices. However, highest grain yield of rice (1.48 t/h) was recorded in FYM (50% N) + Poultry Manure (50%N) combination of organic manure application along with treatment of Azospirillum and PSB. Residual nitrogen in soil also found significantly higher in treatment FYM (50%N) + Poultry Manure (50%N) +Azospirillum + PSB. Thus it is concluded that management of nitrogen through FYM (50% N), Poultry Manure (50%N) and application of biofertilizers like Azospirillum and PSB improved the soil properties of during organic scented rice cultivation.

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