植物残体的分解速率,是评价植物残体在保持和改善土壤有机质状况方面的作用,以及估计土壤对农业废物的处理能力等方面所必需的资料。它决定于植物物质的化学组成和分解的环境条件,因此欲获得这方面可靠的资料,试验条件必须尽可能逼近田间实际情况。早期有关这方面用非标记物料的实验室研究,其水热状况与田间迥异;用塑料纱袋法 The decomposition rate of plant residues is the information necessary to evaluate the role of plant residues in maintaining and improving the status of soil organic matter, and in assessing the soil’s ability to treat agricultural waste. It depends on the chemical composition of plant matter and the decomposition of the environmental conditions, so to obtain reliable information in this regard, the test conditions must be as close as possible to the actual field conditions. In the early laboratory research on non-labeled materials in this area, the hydrothermal conditions were very different from those in the field;