摘要
本试验以高淀粉品种晋薯2号、中淀粉品种内薯3号和低淀粉品种紫花白为试验材料,设置了小区试验,在生育期间从植株茎叶生长及各器官氮、磷、钾的含量变化等方面进行了研究,其结果:(1)含生育期3个品种的叶、茎秆、块茎含氮的浓度均随生育期间的推移而呈逐渐下降趋势。各生育时期块茎淀粉含量始终与茎秆含氮浓度呈正相关,与块茎含氮浓度呈负相关,与苗期和淀粉积累期叶片含氮浓度呈正相关。苗期叶片和块茎形成期茎秆的含氮浓度,可做为高淀粉育种早期选择的重要生理指标,块茎含氮浓度可做为品质鉴定的重要依据;(2)全生育期3个品种叶、茎秆、块茎的含磷浓度的变化与氮相同,均随生育期推移而呈下降趋势。各生育时期块茎淀粉含量始终与叶片、茎秆含磷浓度呈正相关.与块茎的含磷浓度不相关。幼苗期叶片和块茎形成期茎秆含磷浓度可做为高淀粉育种早期选择的重要生理指标;(3) 全生育期3个品种叶、茎秆、块茎含钾浓度变化与氮、磷相同,均随生育期推移而呈逐渐下降趋势。块茎淀粉含量除生育后期与叶片含钾浓度呈正相关外,与茎秆、块茎各时期含钾浓度、叶片前中期含钾浓度不相关或相关不强。
In small area test, using three types of variety, i.c. high starch Jinshu No.2, middle starch Ncishu No.3 and low starch Zihuabai. We studied the growth of leaf and stem, and the change of nitrogen, phosphorous and potassium contents in every organ with growth. The results shows: (1) With growth the content of nitrogen in leaf, stem and tuber decreases gradually. In every growth period,the tuber starch content is positively correlated wi th the stem nitrogen concentration, negatively correlated with the tuber nitrogen concentration, and positively correlated with the leaf nitrogen concentration in the seedling stage and the starch accumulation stage. Therefore, the nitrogen concentration of stem and leaf can be used as an early selection criterion for high starch breading, and the tuber nitrogen concentration can be used as an important quality criterion.(2)With growth the phosphorous concentration of leaf, stem and tuber decreases gradually. In various growth stage, there is a positive correlation between the tuber starch content and the phosphorous concentration of stem and leaf, but the correlation between the tuber starch content and the tuber phosphorous concentration isn't remarkable. So the phosphorous concentration of leaf in seedling stage and of stem during tuber formation period can be used as the early selection criterion for high starch breeding.(3)With growth the potassium concentration of leaf, stem and tuber for all three vavieties also decreases gradully. There is a positive correlation between the tuber starch content and the leaf potassium concentration during later growth period, but there isn' t a correlation between the tuber starch content and the potassium concentration of stem and tuber for every growth period.
出处
《马铃薯杂志》
1993年第2期65-70,共6页
Chinese Potato Journal
基金
内蒙古自然科学基金
