Influence of Micronutrient Application on Nutrient Content, Uptake and Residual Soil Nutrient Status in Rice (Oryza sativa L.) in Western Uttar Pradesh Condition

Abstract

A field experiment was conducted to assess the effect of different nutrient treatments on nutrient content, uptake and residual soil fertility in rice crop at Crop Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut during kharif 2022 on clay loam soil, low in organic carbon, available nitrogen, phosphorous, zinc and iron, medium to high in available potassium and slightly alkaline in reaction. The treatments comprising of different combinations (10) of NPK, Zn and Fe with VAM {Control,100% NPK, 100% NPK + 25kg ZnSO4 ,100% NPK+ 25 kg FeSO4, 100% NPK + 25kg ZnSO4+25 kg FeSO4, 100% NPK + 12.5 kg ZnSO4+ 12.5 kg FeSO4+VAM, 100% NPK+ZnEDTA+FeEDTA, 100% NPK + 0.5% ZnSO4 at tillering and panicle initiation, 100% NPK + 0.5% FeSO4 at tillering and panicle initiation and 100% NPK + 0.5% ZnSO4 +0.5% FeSO4 at tillering and panicle initiation}were tested in RBD with 3 replications. Rice variety PB-1637 was transplanted on 23rd July and harvested on 10th November, 2022 with recommended package of practices except the treatments. Nutrient content, uptake and residual soil fertility were significantly affected by different nutrients treatments. Zn, Fe, Zn+Fe and Zn+Fe+VAM application favored nutrient content, uptake and residual soil fertility when compared to 100% NPK. Among the various treatments crop was applied with 100% NPK + 0.5% ZnSO4 + 0.5% FeSO4 registered highest nutrient content in grain (N- 1.33% ,P-0.43%, K-0.39%, Zn-36.5 mg kg-1 and Fe-127.31 mg kg-1), nutrient uptake in grain (N-57.5 kg ha-1,P- 18.6 kg ha-1 K-16.8 kg ha-1 ,Zn- 157.7 g ha-1 and Fe-550.0 g ha-1) and residual soil nutrient status (N-221.1 kg ha-1, P-17.6 kg ha-1, K-214.7 kg ha-1, Organic Carbon-0.47%, Zn-0.98 mg kg-1 and Fe-6.56 mg kg-1).