On farm response of nutrient management practices on soil, yield and economics of rice- chickpea cropping system in Chhattisgarh

Abstract

On –farm experiments were conducted during Kharif and Rabi seasons of 2017-18 at 24 farmers fields at 6 villages viz. Aaturgaon, 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 (217.79 kg ha-1) and medium in available phosphorus (11.3 kg ha-1), available potassium (303.21 kg ha-1) and organic carbon (0.51%) and acidic in reaction (6.2 pH).The rice- chickpea cropping system experiment was 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: 100:60:40:20 kg/ha N: P: K: ZnSO4 for rice and 20:40:20:20 kg/ha N: P: K: S for chickpea. Whereas, in farmer’s practices 60:40:30 kg/ha N: P: K and 10:20:10 kg/ha N: P: K: were applied in rice and chickpea crops respectively. IGKV R-1 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 (54.47 q ha-1), chick pea (14.27 q ha-1) and RGEY (93.95 q ha-1). Farmers practice treatment recorded highest nutrient response 16.09 kg grain/ kg nutrient and application of recommended dose of N in rice- chickpea cropping system recorded highest nutrient response Rs/Re (8.62). Application of recommended dose of NPK+ micronutrient recorded significantly higher nutrient uptake N (152.58 kg ha-1), P (34.11 kg ha-1) and K (172.57 kg ha-1) by rice- chickpea cropping system. Application of recommended dose of NPK+ micronutrient recorded significantly higher organic carbon (0.68%), available nitrogen (263.57 kg ha-1), phosphorus (18.13 kg ha-1) and potassium (366.36 kg ha-1) at end of the cropping system. Highest positive balance of available nitrogen (98.36 kg ha-1) and potassium (195.72 kg ha-1) recorded in application of recommended dose of NPK + micronutrient and application of recommended dose of NK resulted higher positive balance of phosphorus ((21.5 kg ha-1). Highest gross return (86602 Rs ha-1) and net return (56028 Rs ha-1) of rice, gross return (62764 Rs ha-1) and net return (42430 Rs ha-) of chickpea and gross return (149366 Rs ha-1), net return (98458 Rs ha-) and B: C ratio (2.93) of rice- chickpea cropping system recorded under application of recommended dose of NPK + micronutrient.