水产养殖

于2023年4—7月开展了枯草芽孢杆菌和过硫酸氢钾复合盐对河蟹养殖水质的影响试验。共分3个试验组和1个对照组(空白，C组)，试验组分别为A组(添加1.25 g/m³过硫酸氢钾复合盐，每隔10 d使用1次)、B组(添加0.13 g/m³枯草芽孢杆菌，每隔10 d使用1次)和AB组(枯草芽孢杆菌和过硫酸氢钾复合盐联合施用，添加量同A和B组，每次枯草芽孢杆菌使用5 d后，再投放过硫酸氢钾复合盐)，每组设置3个重复，对应12个玻璃缸，每缸投放20只扣蟹。结果表明，AB组对总氮、溶解性总氮、硝酸盐氮、溶解性总磷去除效果较好；A组对铵态氮去除效果较好；试验后期(7月份), 3个试验组对总氮、溶解性总氮、硝酸盐氮、铵态氮、总磷、溶解性总磷、活性磷酸盐去除效果较好。

From April to July 2023, the effect of Bacillus subtilis and potassium persulfate compound on thewater quality of crab farming was carried out. They were divided into three experimental groups and one controlgroup(blank, group C). The experimental groups were group A(adding 1.25 g/m³potassium persulfate compound,once every 10 days), group B(adding 0.13 g/m³Bacillus subtilis, once every 10 days) and group AB(Bacillussubtilis and potassium persulfate compound were applied in combination, and the addition amount was the same asthat of group A and group B. After Bacillus subtilis was used for 5 days, potassium persulfate compound was added).Three replicates were set for each group, corresponding to 12 glass tanks, and 20 crabs were put in each tank. Theresults showed that AB group had better removal effect on total nitrogen, dissolved total nitrogen, nitrate nitrogenand dissolved total phosphorus. Group A had better removal effect on ammonium nitrogen. In the later stage of theexperiment(July), the three experimental groups had better removal effects on total nitrogen, dissolved total nitrogen,nitrate nitrogen, ammonium nitrogen, total phosphorus, dissolved total phosphorus and active phosphate.