New PDF release: Nutrient cycling in terrestrial ecosystems
By Petra Marschner, Zdenko Rengel
This booklet provides a complete assessment of nutrient biking methods and their value for plant development and atmosphere sustainability. The publication combines basic clinical reports and devised sensible techniques. It includes contributions of best foreign experts from quite a few disciplines leading to multidisciplinary techniques, and all chapters were rigorously reviewed. This quantity will help scientists and practitioners alike.
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Additional info for Nutrient cycling in terrestrial ecosystems
1) In Eq. 1, 'SOC represents the net change in the amount of SOC over a specified time in response to the addition of an amount of organic carbon, CA, and the concomitant losses due to leaching of dissolved organic carbon (DOC) out of the soil profile, CL, lateral movement due to erosion, CE, and mineralisation, CM. Unless external sources of carbon are applied, carbon inputs are controlled by net primary productivity (NPP) originating from photosynthesis in the soil/ plant ecosystem. NPP represents the difference between total C uptake by plant photosynthesis and C loss via plant respiration.
Holzforschung 45:49–54 Mayer LM (1994a) Surface area control of organic carbon accumulation in continental shelf sediments. Geochim Cosmochim Acta 58:1271–1284 McCown RL, Hammer GL, Hargreaves JNG, Holzworth DP, Freebairn DM (1996) APSIM: a novel software system for model development, model testing and simulation in agricultural systems research. Agric Syst 50:255–271 Mendham DS, O’Connell AM, Grove TS (2002) Organic matter characteristics under native forest, long-term pasture, and recent conversion to Eucalyptus plantations in Western Australia: microbial biomass, soil respiration, and permanganate oxidation.
Clay particles have also been observed to encapsulate particles or patches of organic material (Baldock 2002) and isolate organic materials from the decomposer community. At a larger size scale, the formation of aggregates around pieces of plant debris can also limit SOC mineralisation. Since intra-aggregate pores are more often filled with water than inter-aggregate pores, and the diffusion of oxygen is 104 times slower through water than air, organic material trapped inside aggregates tends to be less decomposed than that found on aggregate exteriors (Amelung and Zech 1996).
Nutrient cycling in terrestrial ecosystems by Petra Marschner, Zdenko Rengel