测定甘薯块根干物质含量,是甘薯品种(系)进行定量或定性分析的一项鉴定内容。为了把握较准确的抽样测定方法和对品种(系)的干率评定,我们于1981—1984年以各地育成种(系)和福建地方品种为材料,依据品种特性、块根部位、生长时期、样本容量以及环境条件等不同所表现的差异,设计了块根干率的不同试验处理并进行大量的块根干率的测定及差异分析。现介绍如下: Determination of dry matter content of sweet potato tuber is sweet potato varieties (lines) quantitative or qualitative analysis of an identification content. In order to grasp the more accurate sampling method and the assessment of the dry matter rate of the cultivars (lines), we used the bred lines (lines) and the Fujian local cultivars from 1981 to 1984 as the materials, according to the characteristics of the varieties, the root parts, the growth period, Capacity and environmental conditions, the differences in the performance of different design root block rate of different test treatment and a large number of root dry rate determination and analysis of variance. Now introduced as follows: