Effects of water movement on nitrogen uptake by Gracilaria lemaneiformis (Rhodophyta)
- 海洋环境－已发表论文 
通过在室外0.5t的玻璃缸桶内对不同放养密度的龙须菜进行流水和静水的氮吸收比较养殖试验,发现龙须菜可以同时吸收介质中的铵态氮和硝态氮;静水导致水体中的pH值升高,最大的上升了1单位以上;龙须菜的吸收造成介质中营养盐的减少,在试验开始3h后,静水组的高放养密度处理中出现氮吸收抑制现象;采用流水方式,水流速度在(160～175)L·h-1范围,养殖介质的条件相对稳定,藻体所吸收的氮量也较多,流水组的2kg和4kg处理分别比静水相应处理多吸收N为5.80、10.25(16∶00)和7.64、11.59mg(18∶00),分别比静水条件增加24、31和18、27%。In outdoor, effects of water movement on nitrogen uptake by different stocking densities Gracilaria lemaneiformis were inspected. From this, the following conclusions can be drawn: the macroalgae can simultaneously absorb ambient ammonium and nitrate; In dead media, the uptake of macroalgae to nutrient led to pH values rose in the media and the highest increase in value above 1. After 3 hours of the beginning, nitrogen concentration was low in the dead media and the restrain happened in the barrel had high stocking density; In flowing media, the conditions was good and steady, the macroalgae absorbed more nitrogen than in dead media, in 2kg and 4kg treatments, the nitrogen uptake quantity was more 5.80, 10.25 mg(16∶00); 7.64, 11.59 mg(18∶00) than counterpoint in dead media, and the ratio was increased 24%, 31%; 18%, 27% respectively.