CAJ | 학술논문

研究了N/P(1:1、5:1、12.5:1、30:1、50:1、80:1)对菱形藻的生长速率、营养成分含量及氮磷利用率的影响.试验结果表明,(1)N/P对菱形藻的生长影响显著(P<0.05),其中N/P为12.5:1时,比生长速率最大,当N/P<5:1和N/P>50:1时,菱形藻的生长较慢,比生长速率为0.3～0.6/d;(2)藻细胞营养成分的含量也受N/P的影响:在N/P为12.5:1时,叶绿素的含量达到1.81 g/ml,总脂肪、蛋白质、胞外多糖和胞内多糖的含量分别占干质量的29.9%、17.8%、15.3%、14.2%,高于其他N/P下的营养成分含量;(3)培养后水体中氮磷的含量明显下降,TN的利用率之间有显著性差异(P<0.05),利用率均超过55%,最高为30:1,达78%,TP的利用率之间无显著性差异(P>0.05),均高于90%.
연구료N/P(1:1、5:1、12.5:1、30:1、50:1、80:1)대릉형조적생장속솔、영양성분함량급담린이용솔적영향.시험결과표명,(1)N/P대릉형조적생장영향현저(P<0.05),기중N/P위12.5:1시,비생장속솔최대,당N/P<5:1화N/P>50:1시,릉형조적생장교만,비생장속솔위0.3～0.6/d;(2)조세포영양성분적함량야수N/P적영향:재N/P위12.5:1시,협록소적함량체도1.81 g/ml,총지방、단백질、포외다당화포내다당적함량분별점간질량적29.9%、17.8%、15.3%、14.2%,고우기타N/P하적영양성분함량;(3)배양후수체중담린적함량명현하강,TN적이용솔지간유현저성차이(P<0.05),이용솔균초과55%,최고위30:1,체78%,TP적이용솔지간무현저성차이(P>0.05),균고우90%.
The growth and nutrient contents in alga Nitzschia sp. were studied under different ratios of nitrogen to phosphorus(1:1,5:1,12.5:1,30:1,50:1,and 80:1)to evaluate the uptake ratio of nitrogen to phosphorus. It was found that there was significant differences in growth rate(P<0.05),the maximum at N/P=12.5:1,and the minimum at N/P<5:1 and N/P>50:1.The nutrient contents were obviously in accordance with the growth. There were chlorophyll c(P>0.05)ontent of 1.81 g/ml,29.9% of extracellular polymeric substance(EPS),17.8% of intracellular polymeric substance(IPS),5.3% of protein and 14.2% of lipid in the alga at N/P=12.5:1,higher than those at other ratios of nitrogen to phosphorus.After being cultivated,there was much lower N and P levels in the water media after culture,indicating that there were significant differences in the uptake ratio of total nitrogen(TN),over 55%(the maximum of 78% at N/P=30:1)(P<0.05). However,there were no significant differences in the uptake ratio of total phosphorus(TP),over 90%.