Author/Authors :
Motesharezadeh، B. نويسنده Assistant Professor, Department of Soil Science, College of Agriculture and Natural Sciences, University of Tehran Motesharezadeh, B. , Arasteh، A. نويسنده Department of Soil Science Eng., University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran , , Pourbabaee، A. A. نويسنده Department of Soil Science Eng., University College of Agriculture & Natural Resources, University of Tehran, Karaj, Iran , , Rafiee، Gh. R. نويسنده ,
Abstract :
Limitation of water resources and necessity in profitable production, and consequently
productivity enhancement has taken crop production by means of unconventional water into consideration. In
this study, the effect of different levels of zeolite and nitrifying bacteria were investigated on nitrogenous
compounds absorption in a closed system of carp breeding with alfalfa. Treatments of zeolites at three levels
(with a weight percent of 0, 5, and 10%) and bacterial treatments including two levels (without bacteria and
with nitrifying bacteria) were used for six weeks in such way that produced effluent of the carp breeding from
an experiment unit were entered to alfalfa culturing medium; so a closed cycle was established. The results of
this studyshowed that use of zeolite and nitrifying bacteria significantly decreased ammonia values in comparison
to the control in effluent, in addition, nitrate amount in treatments containing zeolite and bacteria were
significantly (P > 0.05) more than the control treatments. Dry weights of alfalfa in the treatments containing
zeolite and bacteria were more than the control treatments; additionally, use of bacteria was also significant on
dry weight of alfalfa (P > 0.05).This study showed that application of zeolite and nitrifying bacteria to soil,
conversion of ammonia to nitrate happens during nitrification that improves water quality of aquaculture and
causes more uptake of nitrate by plant that reduces water and soil pollution by this element.
