河南农业科学 ›› 2023, Vol. 52 ›› Issue (3): 82-90.DOI: 10.15933/j.cnki.1004-3268.2023.03.009

• 农业资源与环境 • 上一篇    下一篇

供磷水平对柳枝稷干物质量及磷吸收利用特性的影响

屈小玉1,2,吴娜1,赵匆1,陈娟1,刘吉利1,3,4   

  1. (1.宁夏大学农学院,宁夏 银川 750021;2.宁夏大学西北土地退化与生态恢复国家重点实验室培育基地,宁夏 银川 750021;3.宁夏大学西北退化生态系统恢复与重建教育部重点实验室,宁夏 银川 750021;4.宁夏大学生态环境学院,宁夏 银川 750021)
  • 收稿日期:2022-11-21 出版日期:2023-03-15 发布日期:2023-04-14
  • 通讯作者: 刘吉利(1982-),男,山东聊城人,研究员,博士,主要从事能源植物开发利用研究。E-mail:tim11082003@163.com
  • 作者简介:屈小玉(1997-),女,河南安阳人,在读硕士研究生,研究方向:作物生理生态。E-mail:quxiaoyu0413@163.com
  • 基金资助:
    宁夏自然科学基金项目(2022AAC03062);国家自然科学基金项目(31860344)

Effects of Phosphorus Supply Level on Dry Matter Weight and Phosphorus Uptake and Utilization Characteristics of Switchgrass

QU Xiaoyu1,2,WU Na1,ZHAO Cong1,CHEN Juan1,LIU Jili1,3,4   

  1. (1.School of Agriculture,Ningxia University,Yinchuan 750021,China;2.National Key Laboratory of Northwest Land Degeneration and Ecological Restoration of Ningxia University,Yinchuan 750021,China;3.Key Laboratory of Northwest Degraded Ecosystem Restoration and Reconstruction,Ministry of Education,Ningxia University,Yinchuan 750021 China;4.School of Ecology and Environment of Ningxia University,Yinchuan 750021,China)
  • Received:2022-11-21 Published:2023-03-15 Online:2023-04-14

摘要: 为了探究不同供磷水平对柳枝稷干物质量及磷吸收利用特性的影响,采用双因素随机区组设计进行盆栽试验,设置3个品种柳枝稷(低地型品种Alamo加倍体、Alamo和高地型品种Pathfinder),3个供磷水平P0(不施磷,0 mg/kg)、P10(低磷,10 mg/kg)、P100(高磷,100 mg/kg),分析柳枝稷生长指标及磷吸收利用特性相关指标,综合评价不同供磷水平条件下柳枝稷的磷吸收利用特性。结果表明,Alamo加倍体、Alamo和Pathfinder的株高、分蘖数、叶面积、干物质量均随供磷水平的提高而增加,在P100处理下达到最大值。而3个品种柳枝稷的根冠比随供磷水平的提高而降低,P100处理较P0处理分别显著降低了16.67%、17.24%、20.69%。随着供磷水平的提高,3个柳枝稷品种的叶磷含量、根磷含量、磷吸收量呈增加趋势,在P100处理下达到最大值。而磷利用效率呈下降趋势,P100处理较P0处理分别显著下降11.32%、18.31%、18.38%。Alamo 加倍体与Alamo 的磷转移效率均在P100 处理下达到最低值,而Pathfinder的磷转移效率以P10处理为最低。隶属函数分析结果表明,P100处理下3个柳枝稷品种的磷吸收利用特性相关指标的隶属函数均值最大。综上,100 mg/kg(P100)供磷条件下既可以促进3个柳枝稷品种的植株生长及干物质量增加,又能在一定程度上提高磷吸收利用特性。

关键词: 供磷水平, 柳枝稷, 干物质量, 磷吸收利用特性, 隶属函数值

Abstract: In order to explore the effects of different phosphorus supply levels on the dry matter weight and phosphorus uptake and utilization characteristics of switchgrass,a two‑factor randomized block design was adopted to conduct a pot experiment.Three varieties of switchgrass(Alamo syndiploid,Alamo and Pathfinder)were set up,and three phosphorus supply levels P0(0 mg/kg phosphorus),P10(10 mg/kg for low phosphorus)and P100(100 mg/kg for high phosphorus)were used to analyze the growth indexes and phosphorus utilization characteristics of switchgrass,and comprehensively evaluate the phosphorus uptake and utilization characteristics of switchgrass under different phosphorus supply levels.The results showed that the plant height,tiller number,leaf area and dry matter weight of Alamo syndiploid,Alamo and Pathfinder increased with the increase of phosphorus supply level,and reached the maximum under P100 treatment.The root‑shoot ratio of switchgrass decreased with the increase of phosphorus supply level,compared with P0 treatment,the root‑shoot ratio of switchgrass in P100 treatment was significantly decreased by 16.67%,17.24%,20.69%,respectively.With the increase of phosphorus supply level,the leaf phosphorus content,root phosphorus content and phosphorus uptake of three switchgrass varieties showed an increasing trend,and reached the maximum under P100 treatment.Compared with P0 treatment,phosphorus utilization efficiency in P100 treatment decreased by 11.32%,18.31%,18.38%,respectively. The phosphorus transfer efficiency of both Alamo syndiploid and Alamo reached the lowest value in P100 treatment,while that of Pathfinder was the lowest in P10 treatment.The results of membership function analysis showed that the means of membership function values related to phosphorus uptake and utilization characteristics of three switchgrass varieties under P100 treatment were the largest. In conclusion,100 mg/kg(P100)phosphorus supply condition can not only promote the plant growth and dry matter weight of three switchgrass varieties,but also improve the phosphorus uptake and utilization characteristics to a certain extent.

Key words: Phosphorus supply level, Switchgrass, Dry matter weight, Phosphorus uptake and utilization characteristics, Membership function value

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