International Journal of Environmental Sciences

Volume 5 Issue 1 2014- July 2014    Pages: 88-97  <<Previous    Next>>

Effect of season, soil and land use pattern on soil N-mineralization, Ammonification and Nitrification: A study in Arunachal Pradesh, Eastern Himalaya

Author Information:

Bhuyan. S.I1, Tripathi. O.P2. Khan. M.L2

1-School of Biological Sciences, University of Science & Technology, Meghalaya, 9th Mile, Ri-Bhoi, Meghalaya-793101

2-Department of Forestry, North Eastern Regional Institute of Science and Technology, Nirjuli-791109, Arunachal Pradesh, India

ABSTRACT

Net N-mineralization, ammonification and nitrification as influenced by climatic factors, soil characteristics and land use patterns were studied soils of two different land use patterns prevalent in East Siang district, Arunachal Pradesh. Ammonification and nitrification rate varies significantly (p<0.001) between the land use pattern and seasons. The greater amount of N-mineralization was recorded during the rainy season in both the land use patterns while during the spring season (Paddy AES) and rainy season (Homegarden). Ammonification rate is positively correlated with soil pH, SOC, NH4-N and NO3-N. Conversely, nitrification rate is negatively correlated to ammonium and nitrate concentration which suggests that available nitrogen concentration was not saturated in these agricultural systems. Lesser nitrification rate compared to the ammonification rate would be helpful in conserving the soil nitrogen.

Keywords: Gentrification, immobilization, microbial activities, nutrient management, tropical ecosystems.

DOI:10.6088/ijes.2014050100008

© 2014 Copyright by the authors, licensee Integrated Publishing Association.This is an open access article distributed under the Creative Commons Attribution License (3.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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