Optimal Light Intensity and Nitrogen-to-Phosphorus Ratio for Growth of Nitzschia capitellata Hust.  

小头端菱形藻生长的最适光照强度及氮磷比(英文)

作　　者：晏妮[1] 胡晓红[2] 陈椽[1] 

机构地区：[1]贵州师范大学生命科学学院,贵州贵阳550001 [2]贵州师范大学地理与环境科学学院,贵州贵阳55001

出　　处：《Agricultural Science & Technology》2014年第3期453-456,共4页农业科学与技术（英文版）

基　　金：Supported by Guizhou Provincial Science&Technology Fund((2010)2067)~~

摘　　要：Objective] The aim was to explore the potential of Nitzschia capitel ata as excel ent baits and bioenergy, and the optimal light intensity and nitrogen-to-phos-phorus （N/P） ratio suitable for its growth were researched as wel . [Method] With light intensity gradient set, Nitzschia capitel ata was cultured with the same nutrients at （25 ±1） ℃ and light cycle at 12 h/d to select optimal light intensity. Then, Nitzschia capitel ata was cultured with the same condition, and nitrogen-to-phospho-rus ratios at 5∶1, 6∶1, 7∶1 and 8∶1. [Result] With light intensity at 3 000 lx, specific growth rate and standing stock achieved the highest at 0.51 d-1 and 7.97×104 cel s/ml. The growth condition with nitrogen-to-phosphorus ratio at 6∶1 was the most suitable for Nitzschia capitel ata growth. [Conclusion] The optimal light intensity and nitrogen-to-phosphorus ratio were 3 000 lx and 6∶1, respectively, for Nitzschia capitel ata.[目的]为进一步探索小头端菱形藻(Nitzschia capitellata Hust.)作为优质饵料、生物能源的潜能,在室内条件下对小头端菱形藻生长的最适光照强度、氮磷比等培养条件进行研究。[方法]设定不同光照度梯度,在相同营养、温度(25±1)℃以及光周期(12 h/12 d)下进行培养,筛选得出最适光照强度,其次将氮磷比设置为5∶1、6∶1、7∶1和8∶1,置于相同条件进行培养。[结果]在3 000 lx的光照度下,小头端菱形藻的藻比增殖率和现存量最高,分别为0.51 d-1和7.97×104cells/ml。在氮磷比为6∶1条件下,小头端菱形藻生长最佳。[结论]小头端菱形藻的最适光照度为3 000 lx,最适氮磷比为6∶1。

关 键 词：Nitzschia capitellata Hust. Light intensity Specific growth rate Standingstock Nitrogen-to-phosphorus ratio 

分 类 号：S578[农业科学—作物学]