Validation and modification of soil organic matter models in arable soils in Japan and Thailand
2006
Shirato, Y.(National Inst. for Agro-Environmental Sciences, Tsukuba, Ibaraki (Japan))
Soil organic matter (SOM) dynamics directly affects the soil productivity. It is therefore required to develop suitable methods for evaluating the changes in the SOM content caused by changes in the way arable soils are managed. Since some changes in the SOM content or composition occur slowly over decades, long-term experiments are useful for measuring them. Because it is difficult to carry out long-term experiments on all soil types for a large number of management scenarios, SOM turnover models are the only practical means of estimating changes in the SOM content in areas other than the sites of long-term experiments. However, most of existing SOM models were developed and parameterized in the Europe or the USA. There is no model which is fully tested in Asia. The objective of this study was to validate existing SOM models by using long-term experiments in Asia, and to modify it if necessary.
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