EVALUATION OF GREEN HOUSE GAS EMISSIONS FROM VARIOUSCOMPONENTS AND FARMING SYSTEM MODELSIN SOUTHERN TELANGANA ZONE

Abstract

An experiment was conducted to compare and evaluate the greenhouse gas emissions from various components (crop, horticulture and livestock) and farming system models at IFS Unit, College farm, College of Agriculture, PJTSAU, Rajendranagar during 2021-22 and 2022-23. Theintegrated farming system was planned for 1.00 acre area and consisted of four cropping systems i.e., Rice – Groundnut; Pigeonpea + Sweetcorn (1:3) – Bajra; Bt cotton + Greengram (1:2) – Maize; Pigeonpea + Maize (1:3) – Sunhemp, Napier grass and Hedge lucerne as fodder crops, guava orchard, poultry and two sheep units (each 5+1 each). Seven integrated farming system models were formulated by using suitable combinations ofdifferent components and compared. M1: Rice – Groundnut; M2: Rice – Groundnut, Pigeonpea + Sweetcorn (1:3) – Bajra, Bt cotton + Greengram (1:2) – Maize; M3: Rice – Groundnut, Pigeonpea + Sweetcorn (1:3) – Bajra, Pigeonpea + Maize (1:3) – Sunhemp; Napier grass, Sheep (5+1); M4: Rice – Groundnut, Pigeonpea + Sweetcorn (1:3) – Bajra, Bt cotton + Greengram (1:2) – Maize, Pigeonpea + Maize (1:3) – Sunhemp,
Poultry unit; M5: Guava, Hedge Lucerne, Napier grass, Bt cotton + Greengram (1:2) – Maize, Sheep (5+1); M6: Guava, Bt cotton + Greengram (1:2) – Maize, Rice – Groundnut, Poultry; M7: Rice – Groundnut, Pigeonpea + Sweetcorn (1:3) – Bajra, Pigeonpea + Maize (1:3) – Sunhemp; Napier grass, Hedge lucerne, Poultry, Sheep (5+1). Among different IFS models, higher mean negative net emissions (-2542 kg CO2 eq.) were recorded in M4 which was significantly at par with M3 (-2360 kg CO2 eq.), M2 (-2372 kg CO2
eq.) and M7 (-2215 kg CO2 eq.). Based on the findings, it can be concluded that integration of crops with livestock components results in net negative emissions and maintains the sustainability as compared to cropping systems.