بهینه سازی تولید قزل آلای رنگین کمان (Oncorhynchus mykiss) از طریق استفاده از پساب استخرهای خاکی (مطالعه موردی: شهرستان بافق، استان یزد)

This study was carried out in a brackish water earth farm in Bafgh, to use wastewater of earth ponds in order to increase production in rainbow trout earth farms. It was performed in ۲ treatments with ۲ replications. For this purpose, four ۰.۵ha earth ponds (two of those with ۳۰ m۳ round cement ponds at the end and others without cement ponds) were made. The wastewater of culture earth ponds flew in cement ponds through pumping and gravity. The cement ponds aerated with splash aerator during nights. The average initial weight of fish for stocking in all ponds was ۲۵ g and the density of stocking was one and ۷۰ fish per square in earth pond and cement pond, respectively. During about ۱۲۰ days’ culture period, water temperature and salinity were ۱۴±۴ °c and ۱۲.۸±۱ g/l, respectively. The results of some chemical factors measuring in cement ponds indicated that none of them was critical during the culture period. There were significant differences among treatments on some growth factors (p<۰/۰۵). According to The results, through reusing of earth ponds wastewater, yield quantity and production income increased up to ۳۱% and ۴۱%, respectively.

کلیدواژه ها:

قزل آلای رنگین کمان ، استخر خاکی ، آب لب شور ، آب خروجی ، حوضچه بتنی