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桑树不同性别组合种植模式下的生物

朱娟1,刘刚2,肖娟1,竺诗慧1,曾贞1,胥晓1,董廷发1*#br#   

  1. (1西南野生动植物资源保护教育部重点实验室, 西华师范大学生命科学学院, 四川南充 637009; 2四川省农业科学院蚕业研究所, 四川南充 637000)
  • 出版日期:2016-09-10 发布日期:2016-09-10

Biomass of mulberry under planting modes of different gender combinations.

ZHU Juan1, LIU Gang2, XIAO Juan1, ZHU Shi-hui1, ZENG Zhen1, XU Xiao1, DONG Ting-fa1*#br#   

  1. (1Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, College of Life Sciences, China West Normal University, Nanchong 637009, Sichuan, China; 2Sericultural Research Institute, Sichuan Academy of Agricultural Sciences, Nanchong 637000, Sichuan, China).
  • Online:2016-09-10 Published:2016-09-10

摘要: 以雌、雄桑树(Morus alba)幼苗为试验材料,比较不同种植模式(雌-雌、雄-雄、雌-雄)对其生物量及分配的影响,为桑树的种植培育提供理论和技术支撑。结果表明:与雄-雄组合相比,雌-雌和雌雄组合的桑树总生物量均显著增加,分别增加了31.6%和39.2%;与雌-雌组合相比,雄-雄组合的叶生物量显著降低了41.7%,而雌-雄组合的根生物量显著增加了34.5%;从生物量的分配看,雌-雄组合的根重比和根冠比最高。综上所述,不同性别组合种植下桑树的生物量存在差异,雌-雄桑树组合的生物量最高,而雄-雄组合生物量最低。

关键词:  , 弯齿风毛菊, 繁殖特征, 个体大小, 权衡, 海拔

Abstract:

Seedlings of Morus alba were grown in different sex cultivation modes (female-female, F-F; male-male, M-M; female-male, F-M) to evaluate their biomass and allocation. The results showed that the total biomass of M. alba in modes F-F and F-M were higher than in M-M, with increments of 31.6% and 39.2%, respectively. The leaf biomass of M-M was lower than that of F-F (-41.7%), while the root biomass of F-M was higher than that of F-F (+34.5%). Root biomass fraction and root to shoot ratio of F-M were the highest among the three cultivation modes. Our results indicated that the biomass of M. alba was related to the sexrelated cultivation mode, with the highest in F-M and the lowest in M-M among the three treatments.
 

Key words: individual size, reproductive characteristics, trade off., altitude, Saussurea przewalskii