Vol. 12, Issue 7 (2023)

Author(s):
Mukesh Kumar Pandey and Ankita Singh

Abstract:
Field experiments on rice-maize cropping systems were undertaken in Vertisols at IGKV, Raipur, during Kharif 2016-17 and Rabi 2017-18, to investigate the influence of residue management on yield, nutrient absorption, and soil health. Ten treatments of rice and maize were used in the rice-maize cropping system for nitrogen control in RDF and the incorporation of alternate crop residue in the soil. Six metrics were used to assess the system's performance: REY, ANR, AUE, PUE, PE, and SP. The study's findings suggested that the treatment T₅- 100% RDF [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀] was superior. T₁- F P - [(N_{103 P57.5} K₄₅) Rice - Maize (N₁₅₅ P₁₁₅ K₄₅)], T₃- 100% RDF [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀)] generated the highest profitable yields of grain and straw, and this treatment was equivalent to T₁- F P - [(N₁₀₃ P_57.5 K₄₅) Rice - Maize (N₁₅₅ P₁₁₅ K₄₅)]. T₄-100% RDF [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀)] [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀) Trichoderma was present during both years. The study's findings suggested that the treatment T₅- 100% RDF [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀] was superior. T₁- F P - [(N₁₀₃ P_57.5 K₄₅) Rice - Maize (N₁₅₅ P₁₁₅ K₄₅)], T₃- 100% RDF [(N₁₀0 P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀)] generated the highest profitable yields of grain and straw, and this treatment was equivalent to T₁- F P - [(N₁₀₃ P_57.5 K₄₅) Rice - Maize (N₁₅₅ P₁₁₅ K₄₅)]. T₄-100% RDF [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K₄₀)] [(N₁₀₀ P₆₀ K₄₀) Rice - Maize (N₁₂₀ P₆₀ K40) Trichoderma was present during both years Farmers typically utilize 258:172:90 kg ha^-1 N: P: K in the rice-maize system, combined with residue incorporation in the soil. The current study with RDF 220:120:80 kg ha^-1 N: P: K resulted in productivity comparable to farmers but with nutrient savings (38:52:10 kg ha^-1 N: P: K) as well as maintaining and improving soil health in this system as compared to initial soil status as reflected by treatment T₅- 100% RDF [(N₁₀₀ P₆₀ K₄₀)]. Rice (N₁₂₀ P₆₀ K₄₀) - Maize (N₁₂₀ P₆₀ K₄₀) 25% P₂O₅ at RI and 75% as basal + Trichoderma, with an increase in 13.5% N, 18.6% P, 9.6% K, and 17.54% organic carbon in the soil after completing a two-year cycle of rice-maize cropping system, with lowered pH and EC of soil.