文献类型：期刊文献

英文题名：Investigation of main factors affecting the growth rate of Spirulina

作者：Shi, Wen-qing[1];Li, Si-dong[1];Li, Gao-rong[1];Wang, Wen-hua[1];Chen, Qing-xiang[2];Li, Yong-qiang[1];Ling, Xu-wei[3]

机构：[1]Guangdong Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Coll Ocean & Meteorol, Zhanjiang 524088, Peoples R China;[3]Guangzhou City Green Biotechnol Dev Co Ltd, Wuchuan Biol Breeding Base, Wuchuan 524500, Peoples R China

年份：2016

卷号：127

期号：16

起止页码：6688

外文期刊名：OPTIK

收录：SCI-EXPANDED(收录号：WOS:000377734100055)、、EI(收录号：20162002384597)、Scopus(收录号：2-s2.0-84966335539)、WOS

基金：The authors would like to thank the financial support for this work from the fund of the Scientific and Technological Projects of Zhanjiang science and technology bureau, Guangdong Province, China (grant no. A14019).

语种：英文

外文关键词：Spirulina; Growth rate; Influencing factors; Culture medium; Luminous efficiency

外文摘要：Spirulina is a kind of microalgae with high economic value, therefore, investigations of the growth of Spirulina are of great importance. In this paper, the effect of culture conditions (temperature and pH), culture medium, light source (single and combined light source) and the corresponding exposure time on the growth rate of Spirulina is extensively studied. The results showed that the optimal temperature and pH for the growth of Spirulina were 30 degrees C and 9.5-10.0, respectively, while the culture medium with 10 g/L of NaHCO3, 2 g/L of NaNO3, 0.6 g/L of KH2PO4, 0.2 g/L of MgSO4 center dot 7H(2)O and 1.2 g/L of K2SO4 achieved the best growth rate of Spirulina. When being exposed to the red light (wavelength, 620-630 nm), blue light (wavelength, 465-475 nm) and green light (wavelength, 522-532 nm), the maximum dry matter contents of Spirulina were 1.346 g/L, 1.179 g/L and 1.081 g/L, respectively, indicating that the red light was the best light source for the growth of Spirulina as a highest growth rate with an dramatic increase of 56.69% (compared to the control group) in the dry matter content was observed. 8 h were proved to be the best exposure time of red light for the growth of Spirulina within one day, where a dry matter content of 1.440 g/L was found. This was 67.64% higher than that of the control group. Combined light sources of red -blue light, red -green light and blue-green light were also applied to Spirulina, and it was found that the maximum dry matter contents of Spirulina were 1.518 g/L, 1.389 g/L and 1.232 g/L for red -blue light, red -green light and blue-green light respectively. Therefore, the Spirulina exposed to red -blue light attained the highest growth rate with the corresponding dry matter content increasing by 76.72% when compared with the control group. (C) 2016 Elsevier GmbH. All rights reserved.