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红光与远红光比值对温室切花菊花‘神马’花芽分化进程的影响

彭晓丹1,杨再强1,2**,李伶俐1,张继波1   

  1. (1南京信息工程大学江苏省农业气象重点实验室,  南京 210044; 2南京信息工程大学应用气象学院, 南京 210044)
  • 出版日期:2013-06-10 发布日期:2013-06-10

Effects of red and far-red light ratio on the flower bud differentiation of greenhouse cut chrysanthemum cultivar ‘Jingba’.

PENG Xiao-dan1, YANG Zai-qiang1,2**, LI Ling-li1, ZHANG Ji-bo1   

  1. (1Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2 College of Applied Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China)
  • Online:2013-06-10 Published:2013-06-10

摘要:

以切花菊品种‘神马’(Chrysanthemum morifolium cv. ‘Jingba’)为试材,设计红光(R: 660±10 nm)与远红光(FR: 730±10 nm)比值(R/FR)为0.5、2.5、4.5、6.5的LED照光处理,研究不同R/FR处理对菊花花芽分化进程、相对发育速率及花径的影响。结果表明:R/FR=6.5处理的菊花完成花芽分化进程所需时间最短,比R/FR=0.5处理下的菊花缩短了34 d。R/FR越大,菊花花芽分化的相对发育速率越大,完成花芽分化时,R/FR=6.5相对发育速率为R/FR=0.5的2倍。与花芽分化趋势一致,不同光质处理下的花径由大到小的R/FR顺序为:6.5>4.5>2.5>0.5。本研究表明,R/FR=6.5能够显著促进菊花花芽分化进程和花径的生长。
 

关键词: 最小费用模型, 生物多样性, 重力模型, 生态网络

Abstract: An experiment with LED light source irradiation of 4 ratios (0.5, 2.5, 4.5, and 6.5) of red light (R: 660±10 nm) to far-red light (FR: 730±10 nm) was conducted to study the effects of red/far red light ratio (R/FR) on the flower bud differentiation, relative growth rate, and inflorescence diameter of Chrysanthemum morifolium cv. ‘Jingba’. In treatment R/FR=6.5, the duration needed by the ‘Jingba’ to complete its flower bud differentiation was the shortest, being shortened by 34 days as compared to treatment R/FR=0.5. The larger the R/FR, the higher the relative growth rate for the flower bud differentiation would be. When the flower bud differentiation completed, the relative growth rate in treatment R/FR=6.5 was as twice as that in treatment R/FR=0.5. Similar to the flower bud differentiation, the dimension of inflorescence diameter was in the order of treatment R/FR 6.5 > R/FR 4.5 > R/FR 2.5 > R/FR 0.5. This study indicated that the R/FR ratio of 6.5 could promote the chrysanthemum flower bud differentiation and the inflorescence diameter growth significantly.

Key words: ecological network, gravity model, biodiversity., least cost model