甘薯植株生长和块根形成与钾营养吸收利用密切相关。本研究以31份不同类型优质甘薯品种(系)为材料,利用长期肥料定位试验田2个钾肥水平处理(氮磷处理与氮磷钾处理),探讨耐低钾与钾高效型甘薯材料的筛选及评价指标。`结果表明,该试验条件...甘薯植株生长和块根形成与钾营养吸收利用密切相关。本研究以31份不同类型优质甘薯品种(系)为材料,利用长期肥料定位试验田2个钾肥水平处理(氮磷处理与氮磷钾处理),探讨耐低钾与钾高效型甘薯材料的筛选及评价指标。`结果表明,该试验条件下,不同甘薯品种(系)块根产量差异达显著水平(P<0.05);供试材料的钾敏感指数变幅在0.40～0.98之间,差异达显著水平(P<0.05),经聚类分析,可分为低敏感型、适度敏感型、敏感型和高度敏感型;品种(系)两处理下钾累计量与钾浓度差异均达显著或极显著水平;氮磷钾处理下,块根钾利用效率与整株钾利用效率变幅分别为58.92～384.9 g g–1和42.03～165.52 g g–1,品种(系)差异均达显著水平(P<0.05);相关性分析显示,不同甘薯材料间整株总钾累积量、钾浓度、产量性状指标、钾利用效率与钾敏感性间均有一定相关性。长期肥料定位试验田可用于不同钾营养效率甘薯品种(系)的筛选,块根钾利用效率与钾敏感性可作为筛选耐低钾与钾高效利用型甘薯材料的2个主要指标。展开更多
Objective] This study was performed to investigate the trait changes and their correlations as wel as the dynamic changes of biological yield of Xuzishu 3, which wil help to enhance the yield and anthocyanin content o...Objective] This study was performed to investigate the trait changes and their correlations as wel as the dynamic changes of biological yield of Xuzishu 3, which wil help to enhance the yield and anthocyanin content of sweetpotato by cul-tivation. [Method] We systematical y measured the agronomic traits, qualitative char-acters and biological yield of Xuzishu 3 during six growing periods to investigate the dynamic changes of its essential characters and yield accumulation. [Result] The characters of Xuzishu 3 appeared most prosperous after the 90th d except for an-thocyanin content. Extremely significant positive correlations were found between ev-ery two of the dry matter rates of above-ground parts （including leaf petioles, leaves and stems）, reducing sugar content and potato weight per plant. Assimilated product distributed more in stems and leaves than in storage roots before the 90th d in growing period. Photosynthetic capacity and net assimilation rate gradual y de-creased after the 90th d, but the assimilated product distributing to storage roots in-creased quickly and maximized in the 135th d. [Conclusion] Xuzishu 3 is a late ma-turing variety requiring more fertilizer, and the accumulation of anthocyanin fluctuates during the growth period of Xuzishu 3. So yield of Xuzishu 3 can be increased by applying more fertilizer and extending the growth period reasonably, meanwhile the anthocyanin content can be increased by means of control ing temperature, light, water and phytohormone within 60 d after planting.展开更多
文摘甘薯植株生长和块根形成与钾营养吸收利用密切相关。本研究以31份不同类型优质甘薯品种(系)为材料,利用长期肥料定位试验田2个钾肥水平处理(氮磷处理与氮磷钾处理),探讨耐低钾与钾高效型甘薯材料的筛选及评价指标。`结果表明,该试验条件下,不同甘薯品种(系)块根产量差异达显著水平(P<0.05);供试材料的钾敏感指数变幅在0.40～0.98之间,差异达显著水平(P<0.05),经聚类分析,可分为低敏感型、适度敏感型、敏感型和高度敏感型;品种(系)两处理下钾累计量与钾浓度差异均达显著或极显著水平;氮磷钾处理下,块根钾利用效率与整株钾利用效率变幅分别为58.92～384.9 g g–1和42.03～165.52 g g–1,品种(系)差异均达显著水平(P<0.05);相关性分析显示,不同甘薯材料间整株总钾累积量、钾浓度、产量性状指标、钾利用效率与钾敏感性间均有一定相关性。长期肥料定位试验田可用于不同钾营养效率甘薯品种(系)的筛选,块根钾利用效率与钾敏感性可作为筛选耐低钾与钾高效利用型甘薯材料的2个主要指标。
基金Supported by Earmarked Fund for China Agriculture Research System(CARS-11-B03)Key Technology Research and Development Program of Jiangsu Province(BE2013437)the Agricultural Science Independent Innovation Foundation of Jiangsu Province[CX(11)4057]~~
文摘Objective] This study was performed to investigate the trait changes and their correlations as wel as the dynamic changes of biological yield of Xuzishu 3, which wil help to enhance the yield and anthocyanin content of sweetpotato by cul-tivation. [Method] We systematical y measured the agronomic traits, qualitative char-acters and biological yield of Xuzishu 3 during six growing periods to investigate the dynamic changes of its essential characters and yield accumulation. [Result] The characters of Xuzishu 3 appeared most prosperous after the 90th d except for an-thocyanin content. Extremely significant positive correlations were found between ev-ery two of the dry matter rates of above-ground parts （including leaf petioles, leaves and stems）, reducing sugar content and potato weight per plant. Assimilated product distributed more in stems and leaves than in storage roots before the 90th d in growing period. Photosynthetic capacity and net assimilation rate gradual y de-creased after the 90th d, but the assimilated product distributing to storage roots in-creased quickly and maximized in the 135th d. [Conclusion] Xuzishu 3 is a late ma-turing variety requiring more fertilizer, and the accumulation of anthocyanin fluctuates during the growth period of Xuzishu 3. So yield of Xuzishu 3 can be increased by applying more fertilizer and extending the growth period reasonably, meanwhile the anthocyanin content can be increased by means of control ing temperature, light, water and phytohormone within 60 d after planting.
