Vol. 11, Issue 11 (2022)

Author(s):
Jaya Bharti, RP Manjhi, R Thakur, S Karmakar, CS Singh, P Mahapatra, Meeta Kumari and Ranveer Kumar

Abstract:
Maize (Zea mays L.) - Wheat (Triticum aestivum L.) is the third most important cropping system in India and is practiced on 1.8 million hectares. The present investigation was carried out during two consecutive years of 2020-22 under the ongoing permanent manurial trial with different nutrient management practices (inorganic and integrated nutrient management) under maize-wheat system since 1983-84 at Birsa Agricultural University, Kanke, Ranchi to study the influence of long-term application of fertilizer and manure under maize-wheat system on the productivity of crops. The experimental soil was loam in texture (42.4 % sand, 23.4 % silt and 34.2% clay) with slightly acidic (6.5) in reaction having low organic carbon (4.1 g/kg soil) and available nitrogen (255.0 kg/ha), medium in available phosphorous (12.50 kg/ha) and available potash (195.0 kg/ha) consisting 11.13 ppm available iron, 18.65 ppm available manganese and 3.85 ppm available zinc. Twelve treatments consisted, T₁: N0P0K0 to maize fb N0P0K0 to wheat; T₂: 50% RDF to maize fb50% RDF to wheat; T₃: 50 % RDF to maize fb100% RDF to wheat; T₄: 75% RDF to maize fb75% RDF to wheat ; T₅: 100% RDF to maize fb100% RDF to wheat; T₆: 50%N through FYM+ 50% RDF through chemical to maize fb 100% RDF through chemical to wheat; T7:25% N through FYM + 75% RDF through chemical to maize fb75% RDF through chemical to wheat; T8: 50%N through cut paddy straw+ 50% RDF through chemical to maize fb 100% RDF through chemical to wheat; T₉: 25% N through cut paddy straw+ 75% RDF through chemical to maize fb75% RDF through chemical to wheat; T₁₀: 50%N through green karanj leaves + 50% RDF through chemical to maize fb100% RDF through chemical to wheat; T₁₁: 25%N through green karanj leaves + 75% RDF through chemical to maize fb75% RDF through chemical to wheat and T₁₂: Farmer’s Practice– urea @ 50kg /ha to both crops laid out in randomized block design and replicated thrice. Results showed that application of 50%N through FYM along with 50% RDF through chemical fertilizer to maize fb 100% RDF through chemical fertilizer to wheat produced maximum and significantly higher grain yield (46.92 and 47.96 q/ha of maize and wheat respectively) than other nutrient management practices except application of 25%N through FYM along with 75% RDF through chemical fertilizer to maize fb 75% RDF through chemical fertilizer to wheat (45.04 and 45.53 q/ha of maize and wheat, respectively)owing to higher yield attributing characters of maize, grains/line (31.47), grains/cob (394) and 1000 grain weight (331.24 g) and of wheat effective tillers /m² (362), grains/spike (46), and 1000 grain weight (40.99 g).