氮、磷、硅对条纹小环藻生长和叶绿素a含量的影响Effects of Nitrate, Phosphate and Silicate on Growth and Chlorophyll-a Content of Cyclotella striata
曾艳艺,黄翔鹄
摘要(Abstract):
采用单因子实验方法研究氮、磷和硅营养盐对条纹小环藻(Cyclotella striata)生长和叶绿素a含量的影响。结果表明:在不同磷和硅营养盐浓度下,条纹小环藻比生长率μ变化显著(P<0.05),其中,硝酸盐为0.60~0.85 d-1,硅酸盐为0.49~0.61 d-1,磷酸盐为0.46~0.51 d-1。总体而言,在一定的营养盐浓度范围内,条纹小环藻的最大藻细胞密度Nmax随着氮、磷和硅营养盐浓度的增加而增大;条纹小环藻叶绿素a(Chl a)含量亦随着氮、硅浓度的增加,与Nmax增加趋势一致,但随着磷浓度的增加Chl a先增加后减小,与Nmax不一致。条纹小环藻的主要限制营养元素是氮和硅,而磷可能不会成为其短期培养的限制因子。
关键词(KeyWords): 条纹小环藻;叶绿素a;比生长率;营养盐
基金项目(Foundation): 广东省自然科学基金(8152408801000003);; 科技部农业科技成果转化资金项目(2010GB2E000351)
作者(Author): 曾艳艺,黄翔鹄
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