MA Qinghua,HE Shuxia,WANG Weinan,et al.Effects of Phosphorus Supply Levels on Growth and Flowering Quality in Potted-rose of ‘Xianjing’[J].Northern Horticulture,2021,(11):69-75.[doi:10.11937/bfyy.20202182]
磷供应水平对盆花月季‘仙境’生长和品质的影响
- Title:
- Effects of Phosphorus Supply Levels on Growth and Flowering Quality in Potted-rose of ‘Xianjing’
- 文献标志码:
- A
- 摘要:
- 以盆花月季‘仙境’为试材，采用根部浇灌方式，设置0（P0）、10（P10）、20（P20）、30（P30）g?柱-14个磷供应水平，研究了磷水平对盆花月季‘仙境’根系生长、不同器官氮磷养分吸收、叶片SPAD值以及开花品质（花朵数量、花径、花朵干质量等）的影响，以期为月季养分管理提供参考依据。结果表明：磷不同供应水平明显改变了‘仙境’的根系形态，P20和P30处理较P0和P10处理，总根长增加了81%～111%，总根表面积扩大了133%～196%，细根总长度增加了95%～119%。植株不同器官（新生叶片、新生枝条和根系）生物量和氮、磷养分积累量表现出与根系生长类似的趋势。与P0和P10处理相比，P20和P30处理单株花朵数量增加128%～206%，叶片SPAD值增加16%～21%。与对照P0相比，P10、P20和P30花径分别增加12%、19%和24%。植株总根长与总氮和总磷吸收量表现出显著的正相关关系。综上所述，盆花月季‘仙境’对不同磷供应水平表现出高度的根形态可塑性，适宜的磷供应水平促进根系生长和养分吸收，提高开花数量和品质。
- Abstract:
- Rosa hybrida ‘Xianjing’ was used as test material.The pot experiment was carried out,the effects of four phosphorus levels (0，10，20,30 g?plant-1，as P0，P10，P20 and P30) on the root growth，nutrient absorption in different organs，leaf SPAD value，and flowering quality (number of flowers，flower diameter，dry weight of flowers，etc.) of Rosa hybrida ‘Xianjing’ were studied in order to provide a reference for nutient management of rose.The results showed that different phosphorus supply levels significantly changed the root morphology of ‘Xianjing’.Compared with P0 and P10 treatments，the total root length in P20 and P30 treatments increased by 81%-111%，the total root surface area increased by 133%-196%，and the total length of fine root increased by 95%-119%.The biomass of different organs (new leaves，new shoots and roots) and the accumulation of nitrogen and phosphorus nutrients showed a similar trend to root growth.Compared with P0 and P10 treatments，the number of flowers per plant in P20 and P30 treatments increased by 128%-206% and the leaf SPAD value increased by 16%-21%.Compared with the control P0，the flower diameters in P10，P20 and P30 increased by 12%，19% and 24%，respectively.The total root length showed a significant positive correlation with the absorption of total nitrogen and total phosphorus.In summary，the potted rose ‘Xianjing’ exhibited a high degree of root plasticity for different phosphorus supply levels，and an appropriate phosphorus supply levels promoted root growth and nutrient absorption，and improved flowering quantity and quality.
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备注/Memo
第一作者简介：马庆华（1979-），女，博士，助理研究员，现主要从事氮磷养分高效吸收及根际调控机理等研究工作。E-mail:maqinghua519@163.com.基金项目：国家自然科学基金资助项目（31700559）。收稿日期：2020-05-28