甘薯种质资源盆栽保存基质的筛选与评价

为了筛选和优化盆栽基质配比,用于国家种质广州甘薯圃内甘薯资源的盆栽保存,本研究以田土、沙和泥炭土为材料,进行7种基质配比,并利用不同资源品种生长指标测定值对其进行评价与筛选。利用隶属函数、变异系数及主成分分析法对不同基质条件下,不同资源品种地上部鲜重、薯块产量等生长指标进行分析。结果显示：基质5（50%壤土+20%沙+30%泥炭土）条件下,不同甘薯资源品种生长指标变异系数综合隶属函数值及主成分综合评价值最高,分别为8.1639和0.8725,表明基质5可更大程度上保证甘薯资源品种的活力,体现资源品种的种性特征。综上所述,基质5可作为甘薯种质资源盆栽保存的优良基质。

Potted Conservation Substrates of Sweet Potato Germplasms: Screening and Evaluation

To screen and optimize soil substrate for potted conservation of sweet potato germplasm resources in the National Germplasm Guangzhou Sweet Potato Nursery, field soil, sand and peat substrate were selected as materials for seven different soil substrates preparation in this study. The soil substrates were evaluated and screened by measuring the growth indexes of different sweet potato varieties. The growth indexes, including fresh weight of the aboveground parts, the yield of sweet potato tubers and so on, were analyzed by subordinate function, variation coefficient and principal component analysis methods. The results showed that under substrate 5 (composed of 50% field soil, 20% sand and 30% peat soil), the subordinate function value of variation coefficient and the principal component comprehensive evaluation value of the growth indexes of different sweet potato resources were the highest, which were 8.1639 and 0.8725 respectively. It indicated that substrate 5 could keep the vitality and reflect the characteristics of different sweet potato germplasm resources most. Taken together, substrate 5 is recommended to be an appropriate soil substrate for potted conservation of sweet potato germplasm resources.