Eeo-fishery model in soda saline-alkaline land of northeast China

The exDeriments show that eco-fishery pattern of fish-rice-reed-cattail in soda saline-alkaline land of northeast China has a significant benefit．The average yields of rice grain，reed and cattail are 6024．2kg／hm²，8336．2kg／hm²and 7387．6kg／hm²，respectively，and the average fish yields are 912．1kg／hm² ，3537kg/hm²and 2766kg／hm² in paddy fields，reed ponds and cattail ponds，respectively．The average net income is 5667．1 yuan(RMB)／hm² and the ratio ofoutput and input is 2．074 in the experimc ntal area．19000m ³／hm² of water and 290kg／hm² of chemical fertilizer can be sayeel，respec-tively，and the total amount of the salinity of 507kg／hm² has been cut down at a growth period．