International Journal of Applied Research
Vol. 3, Issue 8, Part G (2017)
Nitrogen and phosphorous mineralization and soil microbial biomass carbon, nitrogen and phosphorous in a humid subtropical forest ecosystem of North Eastern India
The humid subtropical forest ecosystem in Meghalaya, north eastern India is a closed canopy forest with high diversity of vascular plants, particularly, the impact of tree species on net N and P mineralization, and soil properties beneath their canopy were studied. The reduction of N and P in Myrica plot (First plot), could be due to sandy nature and lower organic matter and microorganisms that help in retention of NH4+-N, NO3--N and PO43--P. High MBC in Rhododendron plots (Second plot) favoured the growth of microbial population and accumulation of microbial biomass. The higher MBN in Neolitsea plots (Third plot) and mixed (Fourth plot) could be due to higher nutrient return. Significantly higher MBN in these two plots could be due to the higher TKN, soil pH and lower soil C/N and other micro-environmental factors. The high nitrification, net N mineralization and net P mineralization under Neolitsea and mixed plots corresponds to the chemical properties of soil as evident from high pH, TKN, Av.P, extractable inorganic P, intermediate SOC, inorganic N and lowest C/N ratio. The differences among the plots suggest that N and P transformation processes on the forest floor varied depending on the distribution pattern of dominant trees in the patch.
How to cite this article:
Jenpuiru Kamei, HN Pandey, SK Barik, PK Singh. Nitrogen and phosphorous mineralization and soil microbial biomass carbon, nitrogen and phosphorous in a humid subtropical forest ecosystem of North Eastern India. Int J Appl Res 2017;3(8):478-487.