论文部分内容阅读
为了研究不同模式对虾养殖水体中无机磷与叶绿素a的关系,于2001年10月15～19日在广西海洋研究所的养殖试验基地,选取8个封闭式的对虾工厂化养殖试验池和4个水泥底普通的露天养殖池,连续5d现场测定养殖水体的pH值和化学耗氧量(COD),并现场抽滤固定水样,带回实验室分析叶绿素a和无机磷的含量。工厂化养殖试验池采用高密度、高投饵的养殖模式,普通养殖池采用低密度、少投饵的传统养殖模式。结果表明,在工厂化养殖模式中,无机磷含量为0.82～1.59mg/L,叶绿素a含量均在1.7lμg/dm3以下,水体环境呈高磷低植物生物量特征。在普通养殖模式中,无机磷含量均在0.041mg/L以下,叶绿素a含量为3.94～6.86μg/dm3,水体环境呈低磷高植物生物量特征。在两种模式的养殖水体中,无机磷与叶绿素a之间呈显著负相关(r=|-0.791|～|-0.927|>r0.01=0.708),与COD之间呈显著正相关关系(r=0.818～0.904>r0.01=0.708),与pH值之间有3d呈负相关关系(r=|-0.685|～|-0.750|>r0.05=0.576)。光照度的强弱及营养盐补充源的多少对养殖水体中无机磷含量和叶绿素a含量起重要的影响作用。
In order to study the relationship between inorganic phosphorus and chlorophyll-a in shrimp culture water of different modes, eight enclosed shrimp farmed aquaculture test ponds and four aquaculture ponds were selected on October 15-19, 2001 in Guangxi Oceanographic Research Base. The common open-air ponds at the cement bottom were used to measure the pH value and chemical oxygen demand (COD) of aquaculture water continuously for 5 days. The water sample was filtered and fixed on the spot and brought back to the laboratory to analyze the contents of chlorophyll a and inorganic phosphorus. Factory farming test ponds using high-density, high feed farming mode, the general breeding ponds using low-density, less feeding the traditional breeding mode. The results showed that the content of inorganic phosphorus was 0.82-1.59 mg / L and the content of chlorophyll a was less than 1.7 lμg / dm3 in the factory culture mode. The biomass of the plant was characterized by high phosphorus and low biomass. In the general culture mode, the content of inorganic phosphorus was less than 0.041mg / L and the content of chlorophyll a was 3.94-6.86μg / dm3, and the water environment was characterized by low phosphorus and high plant biomass. There was a significant negative correlation between inorganic phosphorus and chlorophyll a (r = | -0.791 | ~ | -0.927 |> r0.01 = 0.708), and there was a significant positive correlation between the inorganic phosphorus and chlorophyll a r = 0.818 ~ 0.904> r0.01 = 0.708), and there was a negative correlation between pH and 3d (r = | -0.685 | ~ | -0.750 |> r0.05 = 0.576). The intensity of illumination and the amount of nutrient supplement source play an important role in the content of inorganic phosphorus and chlorophyll a in aquaculture water.