Influence of different nutrient management practices on productivity, profitability and nutrient dynamics in basmati rice (Oryza sativa) – wheat (Triticum aestivum) cropping systems in western Indo-Gangetic Plains of India

N K JAT; R S YADAV; SUDHIR KUMAR; M SHAMIM; N RAVISANKAR; SUBHASH BABU; A S PANWAR

doi:10.56093/ijas.v89i5.89659

Authors

N K JAT Scientist (Agronomy), ICAR-CAZRI, Jodhpur
R S YADAV Head, ICARIISWC RC, Datia
SUDHIR KUMAR Scientist (Plant Physiology), ICAR-IARI, New Delhi.
M SHAMIM Scientist (Agricultural Meteorology), ICAR-IIFSR, Modipuram
N RAVISANKAR Principal Scientist (Agronomy), ICAR-IIFSR, Modipuram
SUBHASH BABU Scientist, ICAR- Research Complex for NEH Region, Umiam
A S PANWAR Director, ICAR-IIFSR, Modipuram.

https://doi.org/10.56093/ijas.v89i5.89659

Keywords:

Basmati rice-wheat cropping system, Indo-Gangetic Plains, Nutrient uptake, Organic nutrient management, Productivity

Abstract

A field investigation was carried out at ICAR-Indian Institute of Farming Systems Research, Modipuram during 2013-15 to devise the best nutrient management strategy in basmati (Oryza sativa L.)â€“ wheat (Triticum aestivum L. emend Fiori and Paol) cropping system. Investigation used six nutrient management practices, viz. 100% organic; 75% organic + innovative practices; 50% organic + 50% inorganic; 75% organic + 25% inorganic; state recommendation and 100% inorganic. Grain yield and nutrient uptake of basmati rice and wheat were found at par under organic (100% organic and 75% organic + innovative practices) and integrated nutrient management practices (50% organic + 50% inorganic and 75% organic + 25% inorganic), however it was significantly higher compared to 100% inorganic nutrient management. Organic nutrient management, i.e.100% organic and 75% organic + innovative practices resulted in 42.4 and 37.7% higher grain yield in case of basmati rice and 29.3 and 39.7% higher yield in case of wheat, respectively over 100% inorganic; besides being superior in terms of soil available N, P, K and organic carbon. Additional net returns to the tune of ` 53.2 × 103/ha and ` 59.7 × 103/ha from basmati rice-wheat cropping system was recorded under 100% organic and 75% organic + innovative practices, respectively over 100% inorganic. Nutrient management through 75% organic + innovative practices in basmati rice-wheat cropping system resulted in ` 6.5 × 103/ha additional returns over 100% organic nutrient management and it also scored highest in terms of nitrogen use efficiency of both basmati rice (48.5 kg/kg N) and wheat (38.1 kg/kg N). A significantly higher residual soil fertility in terms of available N, P, K and organic carbon in soil as compared to 100% inorganic nutrient management was also observed.

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