不同水力负荷下薄荷去除养殖水氮磷研究

采用小区试验方法,研究了不同水力负荷条件下薄荷(Mentha arvensis)对鱼塘养殖循环水氮、磷的吸收能力和去除作用。结果表明,当水力负荷为0.35~1.40 m^3/(m^2·d)时,薄荷的生物量累积增加1.40~1.95 kg/m^2,产量为11 098~15 177 kg/hm^2;在水力负荷0.35 m^3/(m^2·d)时,薄荷组织中氮含量表现为地上部>地下部,根冠比(地上部/地下部)为1.05;而磷含量在4种水力负荷下均表现为地上部<地下部,随水力负荷的增大,根冠比分别为0.93、0.86、0.69、0.71。整株的氮、磷平均含量在4种水力负荷下分别在14.43~17.23和3.09~3.35 mg/g;薄荷对氮、磷的吸收总量在水力负荷1.05 m^3/(m^2·d)时均达到最大,分别为36.20和7.53kg/hm^2;在水力负荷0.35 m^3/(m^2·d)时,薄荷吸收作用对系统去除水体氮、磷的贡献率达最大,分别为15.95%和22.12%。

Studies on the Technology for Mass Production of Abalone Breeding

Based on the traditional way of abalone breeding,the technological process of industrial abalone breeding suitable for the coastal areas of southern China has been developed.The process is simple and easy to handle,and results in a high yield of young abalones after being applied.