15个淀粉甘薯主要农艺性状的综合评价

Comprehensive Evaluation of Key Agronomic Characters in 15 Starch Sweetpotato Varieties

以15个淀粉甘薯品种为试材,采用灰色关联法、DTOPSIS法对淀粉甘薯在郑州栽培的8个农艺性状进行综合评价及分析,结果表明,15个淀粉甘薯品种的8个农艺性状均存在差异显著,变异系数在13.36%~92.01%,产量排名前三的品种为哈密、商薯19和徐薯37;相关分析表明,产量与商品率呈极显著正相关,单株分枝数与商品率呈显著正相关,7个农艺性状对淀粉甘薯产量影响大小依次为商品率>茎直径>单株分枝数>干物质>叶面积>最长蔓长>单株结薯数。DTOPSIS分析结果表明,综合排序前3名与产量前3名排序一致,仅有4个甘薯品种排序有所变化,其余均与鲜薯产量排序一致。综上分析,DOTPSIS法可作为淀粉甘薯品种综合评价的一种方法,筛选出哈密、商薯19和徐薯37可以作为新品种在郑州进行示范推广。

Using 15 starch sweetpotato varieties as test materials,the grey correlation method and DTOPSIS method were used to comprehensively evaluate and analyze eight agronomic traits of starch sweetpotato cultivated in Zhengzhou.The results showed that there were significant differences in eight agronomic traits among the 15 starch sweet potato varieties,with a coefficient of variation of 13.36%to 92.01%.The top three varieties in yield were Hami,Shangshu 19,and Xushu 37;Relevant analysis showed that there was a significantly positive correlation between yield and commodity rate,and a significantly positive correlation between branch number per plant and commodity rate.The influence order of seven agronomic traits on yield of starch sweetpotato was commodity rate>stem diameter>branch number per plant>dry matter>leaf area>longest vine length>tuber number per plant.The results of DTOPSIS analysis showed that the the top three comprehensive rankings were consistent with the ranking of the top three in yield,with only four sweetpotato varieties having changes in the ranking,and the rest were consistent with the ranking of fresh sweetpotato yield.In summary,the DOTPSIS method can be used as a comprehensive evaluation method for starch sweetpotato varieties,and Hami,Shangshu 19,and Xushu 37 can be selected as new varieties for demonstration and extension in Zhengzhou.