Analysis of the output to input ratio in farmland ecosystem in Shouguang Experimental Area,the prevention and cure of seawater intrusion project in Laizhou Bay

Energy and material flux in Lijia village farmland ecosystem were analysed and evaluated.The results showed that the Lijia village,which used to be affected by seawater intrusion,after harnessed by agro-eco-engineering,its system function has been strenthened up,and its structure tends to reach rationalization.Then some problems which should be paid attention to are pointed out concerning eco-agricultural development in the region.