Influence of Organics and Inorganics on Mineralization of Nitrogen in the Soil under Controlled condition

Author: Shiva Kumar H.D., Kalyana Murthy K.N., Anand M.R., Prakasha H.C., Boraiah B. and Nanjareddy Y.A.

Download PDF

Abstract

Understanding nitrogen release patterns from decomposing organic manures will help in optimizing nitrogen use efficiency in crop production systems. In a pot-culture experiment of finger millet carried out for 10 weeks period, a significantly higher nitrate nitrogen (NO3--N) content (48.6, 47.51 and 48.52 mg kg-1, respectively) was recorded with 100% RDN through FYM + 25% through inorganic fertilizers at 56, 63 and 70 DAI. The NO3--N content recorded in Only inorganics treatment was found significantly higher than NO3--N content recorded in treatments 100% RDN through FYM + 25% through inorganic fertilizers, 75% RDN through FYM + 25% through inorganic fertilizers and Only organics treatments at 14, 21, 28, 35, 42, 49 DAI. The significantly higher Ammonical nitrogen (NH4+-N)content (28.65, 40.80, 51.14, 55.46, 61.37, 69.01 and 62.92 mg kg-1, respectively) was recorded in Only inorganics treatment at 7, 14, 21, 28, 35, 42, 49 DAI which decreased thereafter until 70 days followed by 100% RDN through FYM + 25% through Inorganic fertilizers (24.46, 30.69, 41.77, 48.48, 55.71, 59.25 and 59.24 mg kg-1, respectively) and 75% RDN through FYM + 25% through inorganic fertilizers(23.08, 25.40, 37.66, 44.60, 51.58, 55.75 and 56.94 mg kg-1, respectively) and at 56, 63 and 70 DAI significantly higher NH4+-N content (61.88, 62.13 and 61.13 mg kg-1, respectively) was recorded with 100% RDN through FYM + 25% through Inorganic fertilizers. Our pot-culture results suggest that the use of organic manures as the source ofN supply for crops for short and long term should be encouraged.

Keywords

Nitrate nitrogen (NO3-N), Ammonical nitrogen (NH4+-N), Mineralization of Nitrogen, Manure Levels, Pot-culture, Finger Millet.

Conclusion

From this study, it can be concluded that the integrated use of inorganic fertilizers with organic manures represents the sound practice for sustaining the nitrogen reserves in soil and this will be a more beneficial proposition than the application of inorganics alone in improving the soil nitrogen status and enhancing nutrient availability to the crop during the critical stages of nutrient requirement and yield under an intensive cropping system.

References

-

How to cite this article

Shiva Kumar H.D., Kalyana Murthy K.N., Anand M.R., Prakasha H.C., Boraiah B. and Nanjareddy Y.A. (2022). Influence of Organics and Inorganics on Mineralization of Nitrogen in the Soil under Controlled condition. Biological Forum – An International Journal, 14(4): 258-262.