I am looking for k2 values: "humus annual decomposition rates"
for tropical (cocoa) conditions, in Indonesia.
I would like to use them for a simple Hénin-Dupuis modeling experiment on soil organic matter dynamics.
Otherwise, have you heard of a method to approximate the k2 value depending on climate and soil data for example?
Thanks
Please find enclosed the K1 and K2 mineralization rates, however it is not for indonesian conditions. Hope that it may be useful
Please go through the following article for detailed information
Soil organic carbon as observed in lowland of continuous rice cropping in guinea savanna..... 2017. Journal of Research in Environmental and Earth Science 3(3):25-34.
Co-efficient of humus mineralization can be calculated by equation of Bouvier et al, 2016
K2= (0.3t - 3)/[(1+0.05 X CL (%)) X (100 + 0.15 CaCO3)(%o)
t = annual average temp, CL % is the proportion of clay in soil, CaCO3 is the soil content of CaCO3 (%), known that 40.04 % is the content of Ca
Qualitative and quantitative differences in SOC can affect the rate of humification.
K2 = 0.06/year for Argentina soil
K2= 0.01/year in tropical Ultisol of SE Brazil
K2= 0.01/year in clayey Ultisol in a region of Brazil with low temp and rainfall
K2= 0.02 /year in soils of Netherland, indicating that 2 % of humus is mineralized
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