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沉水植物穗花狐尾藻耐盐性与生长

刘萌萌,刘巧,杨娜,包炎琳,张琪,于克锋,霍元子,何培民*   

  1. (上海海洋大学海洋生态与环境学院, 上海 201306)
  • 出版日期:2019-03-10 发布日期:2019-03-10

Salt tolerance and growth of submerged macrophyte Myriophyllum spicatum.

LIU Meng-meng, LIU Qiao, YANG Na, BAO Yan-lin, ZHANG Qi, YU Ke-feng, HUO Yuan-zi, HE Pei-min*   

  1. (College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China).
  • Online:2019-03-10 Published:2019-03-10

摘要: 通过室内人工海水培养和杭州湾栽培实验,探究了穗花狐尾藻的耐盐能力及在低盐度水域中的生长情况。室内培养表明:穗花狐尾藻断枝可在盐度12以内的人工海水中正常生长;低盐度处理可促进不定根的生长;水体盐度达到15后,穗花狐尾藻叶绿素含量和最大光合效率Fv/Fm降低,生长停滞,大部分植株逐渐死亡。野外栽培表明:从2017年6月到2018年5月,穗花狐尾藻可在杭州湾水体盐度6.06~9.03,水温3.85~33.37 ℃条件存活,8—10月是穗花狐尾藻的快速生长期;穗花狐尾藻在杭州湾低盐度水体中可进行有性繁殖和无性繁殖,以无性繁殖为主。研究结果为穗花狐尾藻在低盐度水体中建立种群提供了依据。

关键词: 小麦间作蚕豆, 根系, 供N, 供P, 调控

Abstract: Salt tolerance and growth properties of Myriophyllum spicatum were investigated by both artificial seawater culture and cultivation in Hangzhou Bay. Results from the indoor cultivation showed that the branch of M. spicatum could grow normally in artificial seawater with salinity less than 12. Low salinity treatment promoted the growth of adventitious roots. When salinity reached 15, the chlorophyll content and maximum photosynthetic efficiency (Fv/Fm) of M. spicatum decreased, the growth was stagnant, and most plants died gradually. Results from field cultivation showed that M. spicatum could survive in the salinity of 6.06-9.03 in Hangzhou Bay from June 2017 to May 2018, with water temperature of 3.85-33.37 ℃. The rapid growth period of M. spicatum was from August to October. M. spicatum can carry on sexual reproduction and vegetative reproduction in the low salinity water of Hangzhou Bay, mainly by vegetative reproduction. These results provide basis for the establishment of M. spicatum in waters with low salinity.

Key words: Spring wheat spring faba bean intercropping, Root system, Nitrogen supply, Phosphorus supply, Regulation