不同处理方法对养殖池塘上覆水体可溶性氮含量的影响

以天津市东丽区和西青区养殖池塘为对象,取池塘的底泥和上覆水,采用对照组、添加沸石、酶抑制剂、芽孢杆菌、沸石与酶抑制剂组合、沸石与芽孢杆菌组合6种处理组,于实验室内进行5个月培养,每月测定1次上覆水中NH4+-N、NO3--N和NO2--N含量,同时对实际养殖池塘上覆水中NH4+-N、NO3--N和NO2--N含量进行监测。结果表明,两池塘上覆水体中NH4+-N和NO3--N含量随采样时间不同而变化,实际池塘与室内对照组两者含量相差不大;NO2--N含量在室内外及不同处理、不同采样期两池塘变化都很小且含量很高。芽包杆菌、沸石既能减少上覆水中NH4+-N含量,也降低了NO3--N含量。酶抑制剂处理组虽然使NH4+-N含量下降最多,但其上覆水中NO3--N含量较高。

Effect on Dissolved Nitrogen Content of the Overlying Water in Ponds by Difference Treatments

The ponds in Tianjin Dong li and Xi qing district were studded. The sediments and overlying water were placed under room experimental environment. One control and five treatments-zeolite, enzyme inhibitor, Bacillus spp., zeolite and enzyme inhibitor, zeolite and Bacillus spp.-were taken. Dissolved NH_4~+-N, NO_3~--N and NO_2~--N contents in overlying water were determined monthly, meanwhile NH_4~+-N, NO_3~--N and NO_2~--N contents in the overlying water of practice ponds were monitored. The results showed that NH_4~+-N and NO_3~--N contents of the two ponds varied in deferent time. NH_4~+-N and NO_3~--N contents in the two actual ponds and controls Changed consistently. NO_2~--N contents were high and changed little. Bacillus spp.and zeolite could decrease NH_4~+-N, NO_3~--N contents. Enzyme inhibitor could decrease NH_4~+-N contents greatly, but NO_3~--N contents were high in overlying water.