Effect of organic and synthetic fertilizer management on rice yield and micronutrient transformation in soil

Abstract

The present investigation was conducted during kharif 2022 at the CRC of Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (U.P.) to studies the effect of organic and synthetic fertilizer management on rice yield and micronutrient transformation in soil. The soil of experimental site was clay- loamy in texture, slightly alkaline, non-saline, low in organic carbon, N, P, and high in available K. DTPA extractable micronutrient were in high amount. Eleven treatments, viz., T1 (Absolutely Control), T2 (100:75:0 kg NPK ha-1), T3 (100:75:60 kg NPK ha-1), T4 (Only FYM @ 20 t ha-1), T5 (Only VC @ 20 t ha-1), T6 (50:37.5:30 kg NPK ha-1 + FYM @ 20 t ha-1), T7 (50:37.5:30 kg NPK ha-1 +VC @ 20 t ha-1 ), T8 (100:75:60 kg NPK ha-1 + FYM @ 10 t ha-1), T9 (100:75:60 kg NPK ha-1 + VC@ 10 t ha-1), T10 (50:37.5:30 kg NPK ha-1 + FYM @ 10 t ha-1) and T11 (50:37.5:30 kg NPK ha-1 + VC @ 10 t ha-1) were tested in RBD with three replication. The study revealed that application of T9 significantly improved the growth, yield attributes, plant nutrients content, and uptake, thus increasing the yield of rice over control with a corresponding increase of 61.2 and 34.5 percent in grain and straw yield of rice, respectively, although this treatment was found to be on par with T7 and T11. The total nitrogen, phosphorus, potassium, zinc, and iron uptake by the rice crop was also highest (100.9 ha-1, 31.4 ha-1, 120.2 kg ha-1, 532.2 g ha-1, and 1279.8 g ha-1), respectively, with the application of T9. Thus, the inclusion of inorganic with organic sources of plant nutrients encourages not only the yield of rice but also soil health and mitigates the world-wide phenomenon of micronutrient deficiencies.