有机物料在潮土中的腐解残留率测定方法改进与变化规律

在河南省潮土上进行有机物料的腐解残留率两种测定方法的比较研究。结果表明，在潮土区用锦纶袋——重铬酸钾容量法测定有机物料腐解残留率更符合田间实际情况，建议用该法替代砂滤管——重铬酸钾容量法进行相关研究。用锦纶袋法测定小麦秸秆在潮土中的腐殖化系数为12．25％。

Study on the improvement of the determining method and regular of change for the decomposing and retention rate of the organic material in fluvo-agvic soil

The comparative study on the two methods for determining the decomposing and retention rate of the organic material in fluvo-agvic soil in Henan province was carried out.The result showed that it conformed to the actual condition of the field to determine the decomposing and retention rate of the organic material with the method of nylon bag-potassium dichromate,so it's suggested that the relative study being performed with the method to replace the method of sand filtration tube-potassium dichromate.The humification cofficient of the wheat straw determined with the nylon bag method was 12.25%.