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将初始体质量(5.07±0.45)g的仿刺参幼参放养在池塘内竹制的4m×4m×1.5m网格中,将夹有初始平均体长(31.7±10)cm,体质量(2.32±1.2)g的鼠尾藻和菊花心江蓠的聚乙烯苗绳均匀地系在网格竹竿骨架上。仿刺参初始放养密度为11头/m2,鼠尾藻和菊花心江蓠的密度分别为187.5g/m2、375g/m2、562.5g/m2、750g/m2和250g/m2、500g/m2、750g/m2、1000g/m2,后轮养的菊花心江蓠按密度从小到大分别放置于原混养鼠尾藻密度为187.5g/m2、375g/m2、562.5g/m2、750g/m2网格内。每隔15d检测一次不同轮养系统中仿刺参和藻类的生长及水体中叶绿素a,底泥中总氮、总磷和有机碳含量的变化。120d的饲养结果表明,轮养大型藻的仿刺参特定生长率高于单养对照组的仿刺参,混养鼠尾藻562.5g/m2后,轮养菊花心江蓠750g/m2的模式下,仿刺参的特定生长率显著高于对照组(P<0.05);轮养水体中叶绿素a含量明显下降,大型藻净产量越高,水体中叶绿素a含量下降越明显;轮养组底泥中总氮、总磷和总有机碳含量均明显低于单养组(P<0.05)。
The initial body weight (5.07 ± 0.45) g of sea cucumber seedlings were stocked in a 4m × 4m × 1.5m grid of bamboo in the pond. The average body length (31.7 ± 10) cm and body weight 2.32 ± 1.2) g of Sargassum ficus and Chrysanthemum Xinyi polyethylene seedling ropes tied evenly on the grid bamboo pole skeleton. The initial stocking density of A. japonicus was 11 heads / m2. The density of Sargassum thunbergii and Chrysanthemum spp. Were 187.5g / m2, 375g / m2, 562.5g / m2, 750g / m2 and 250g / m2, 750g / m2, 1000g / m2, the rear wheel raised chrysanthemum heart Jiang 蓠 according to the density from small to large were placed in the original polyculture Sargassum density 187.5g / m2, 375g / m2, 562.5g / m2, 750g / m2 net Grid inside. The growth of sea cucumber and algae in different rotation system and the changes of chlorophyll a, total nitrogen, total phosphorus and organic carbon in sediment were detected every 15 days. The results of 120 days showed that the specific growth rate of A. macrophylla was higher than that of monoculture control group, with the pattern of 750g / m2 , The specific growth rate of A. ginseng was significantly higher than that of the control (P <0.05). The content of chlorophyll a decreased significantly in round-fed water and the net production of macrophytes was higher, and the chlorophyll-a content in water decreased more obviously. Total nitrogen, total phosphorus and total organic carbon in the mud were significantly lower than those in the monoculture group (P <0.05).