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氮磷比对蛋白核小球藻和湛江等鞭金藻种间竞争的影响

魏杰,王月琪,刘倩,赵文**,王丽,丛玉婷   

  1. (大连海洋大学辽宁省水生生物学重点实验室, 辽宁大连 116023)
  • 出版日期:2014-08-10 发布日期:2014-08-10

Effect of nitrogen-phosphorus ratio on the competitive relationship of Chlorella pyrenoidosa and Isochrysis zhanjiangensis. 

WEI Jie, WANG Yue-qi, LIU Qian, ZHAO Wen**, WANG Li, CONG Yu-ting   

  1. (Key Laboratory of Hydrobiology in Liaoning Province, Dalian Ocean University, Dalian 116023, Liaoning, China)
  • Online:2014-08-10 Published:2014-08-10

摘要:

为了了解饵料微藻的种间竞争关系,通过微藻共培养的方法,以NaNO3和KH2PO3作为氮源和磷源,研究了氮磷比对蛋白核小球藻(Chlorella pyrenoidosa)和湛江等鞭金藻(Isochrysis zhanjiangensis)种间竞争的影响。结果表明:在单养模式下,蛋白核小球藻生长适宜的N/P为4~22,N/P>22时其生长受抑制,而湛江等鞭金藻生长受N/P影响不明显;共养模式可促进蛋白核小球藻的生长,而抑制湛江等鞭金藻的生长;蛋白核小球藻具有明显的竞争优势,且N/P为13和16时其种群竞争优势最明显;在蛋白核小球藻大规模生产性培养时可接入等生物量或少量湛江等鞭金藻,一方面利用共养模式提高蛋白核小球藻的产量,另一方面可根据养殖生产需要适时采收混合藻类饵料用于投喂。

 

关键词: 微生物组, AM真菌, ACC脱氨酶, 印度梨形孢, 根际促植物生长细菌

Abstract: In order to understand interspecific competition of live prey microalgae, the effect of nitrogen-phosphorus ratio (N/P) on the interspecific competition of Chlorella pyrenoidosa and Isochrysis zhanjiangensis was investigated by adding NaNO3 and KH2PO3 as N and P sources. Under monoculture mode, C. pyrenoidosa normally grew with N/P ranging from 4 to 22 and was inhibited when the ratio was over 22, while I. zhanjiangensis was not obviously affected. Co-culture mode could promote the growth of C. pyrenoidosa and inhibit the growth of I. zhanjiangensis. C. pyrenoidosa owned an obviously competitive advantage in the co-culture mode, especially when N/P was 13 and 16. C. pyrenoidosa could be co-cultured with I. zhanjiangensis in large scale production, which might increase the output of C. pyrenoidosa and provide the possibility to harvest mixed microalgae as live food for aquaculture.

Key words: 1-aminocyclopropane-1-carboxylate deaminase, plant growth-promoting rhizobacteria, arbuscular mycorrhizal fungi, microbiome, Piriformospora indica