Effect of on-farm nutrient management practices on soil, yield and economics of rice-chickpea cropping system at north Bastar Kanker district of Chhattisgarh

Abstract

On - farm experiments were conducted during Kharif and Rabi seasons of 2019-20 at 24 farmer’s fields at 6 villages viz. Aturgaon, Bevarti and Mohpur of Block- Kanker and Hatkondal, Gotulmunda and Damkasa villages of Block - Durgukondal, District-Uttar Bastar Kanker, situated in Chhattisgarh Plain Zone (CG-1) and Bastar Plateau Zone (CG-2) of Chhattisgarh. Experiment conducted at 4 farmer’s field in each village. The soils of experimental site were sandy loam to loam; with low in available nitrogen (188.16 kg ha-1) and available phosphorus (10.76 kg ha-1) and medium in available potassium (321.16 kg ha-1) and organic carbon (0.56%) and neutral in reaction (7.56 pH). The rice- chickpea cropping system experiments were conducted with seven treatments viz. control (T1), N (T2), NP (T3), NK (T4), NPK (T5), NPK+ micro nutrient (T6) and Farmers practice (T7). For Zn micro nutrient ZnSO4 applied in rice and Single Super Phosphate applied for both P and S in chickpea under T6 treatment. The recommended dose of nutrients were: 100:60:40 kg ha-1 N: P2O5: K2O + 20 kg ha-1 ZnSO4 for rice and 20:40:20:20 kg ha-1 N: P2O5: K2O: S for chickpea. Nutrients dose 60:40:30 kg ha-1 N: P2O5: K2O and 10:20:10 kg ha-1 N: P2O5: K2O were applied in rice and chickpea crops respectively under farmer’s practice. IGKV R-2 variety of rice and JAKI-9218 variety of chickpea grown with recommended package of practices under irrigated condition. The application of recommended dose of NPK + micro nutrient recorded significantly higher grain yield of rice (50.40 q ha-1), chick pea (13.15 q ha-1) and RGEY (85.85 q ha-1). Farmers practice treatment recorded highest nutrient response 11.49 kg grain/ kg nutrient and application of recommended dose of N in rice- chickpea cropping system recorded highest nutrient response Rs/Re (15.15). Application of recommended dose of NPK+ micro nutrient recorded significantly higher nutrient uptake N (153.41 kg ha-1), P (32.79 kg ha-1) and K (174.08 kg ha-1) by rice- chickpea cropping system. Application of recommended dose of NPK + micro nutrient recorded significantly higher organic carbon (0.61%), available nitrogen (200.65 kg ha-1), phosphorus (11.42 kg ha-1), potassium (316.60 kg ha-1) at end of the cropping system. Highest positive balance of available nitrogen (165.9 kg ha-1) and phosphorus (33.45 kg ha-1) and potassium (169.52 kg ha-1) recorded in application of recommended dose of NPK + micronutrient. Highest gross return (156585 Rs ha-1), net return (100620 Rs ha-1) and B: C ratio (2.80) of rice- chickpea cropping system recorded under application of recommended dose of NPK + micronutrient.