基于主成分分析评价郁金香留床栽培的观赏价值
Fujian Journal of Agricultural Sciences（2022）
Abstract
[目的]留床栽培是解决郁金香种球消耗性栽培的途径之一,本研究旨在分析不同郁金香品种在留床栽培后观赏价值的变化,筛选出适宜露地留床栽培的郁金香品种,为提高种球利用率、降低园林应用成本提供技术支撑.[方法]对荷兰引进的36个郁金香品种进行连续2年不采挖的留床栽培,测定株高、基生叶数、最长叶叶长、最短叶叶长、最长叶叶宽、最短叶叶宽、花径、花瓣长、花葶长、冠幅、叶面积、叶绿素等12个地上部表型性状,并进行主成分分析及综合评价.[结果]留床栽培1年后36个品种的出苗率为16.51％～86.67％,出苗率下降7.14％～82.10％,其中17个品种的出苗率降幅小于40％.表型性状主成分分析结果表明,综合评价观赏价值时优先考虑株高、基生叶数、最长叶叶长、最短叶叶长、最长叶叶宽、最短叶叶宽、花径、花葶、叶面积等9个性状的变化情况.根据主成分得分对36个品种进行排名,留床一年后排名有所提升的品种占总数的55.5％,排名退后的品种占总数的19.4％.结合出苗率、综合排名和表型性状的增减数目,共筛选出6个在留床栽培后观赏价值较高且稳定的品种:Yellow Pomponette、Negrita、Leen Van Der Mark、Christmas Marvel、Pink Pomponette、Parade.[结论]筛选出6个适宜在西宁地区或相似环境条件下进行露地留床栽培的郁金香品种.
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