Kan wichai lumnam thi Huai Khok Ma.
1979
Bunvong Thaiutsa | Choompol Ngampongsai | Samakkee Boonyawat
56 % of the annual litter-fall decomposed during the first year. The decomposition parameter k was found to be 2.28. With this rate, a complete mineralization of forest litter in this area could occur within 1.8 years. There were positive linear correlations between percent decomposition and each of the four independent variables: relative humidity, rainfall, dryness ratio, and hydrofactor. Relationship with maximum temperature was found to be negative. Using a stepwise regression procedure, two multiple regression were developed. Both equations showed highly significant correlation coefficient. Those four variables accounted for almost 90 % of the variance in the measured decay rates. Decomposition rates of this watershed stand could be predicted from relative humidity as well as from the combination of relative humidity, rainfall, actual evapotranspiration, and mean temperature. Rainfall played greater role in litter breakdown than temperature. Surface soil water and moisture content of litter were suggested to be accounted for in the future studies.
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