Abstract: Experimental sites for this stady are located on Lixiahe Plain of central Jiangsu province. The complex management can make full and rational use of natural resources and create higher productivity and economic benefits. Compared with mono-cropping system, the photo -utilization rate of this complex system is increased by 1—3.6 times,biomass by 1—4 times and net profit by 1—2 times. The ecosystem has better cyclings and can benefit us with improvements of woodland fertility and environmental quality, increment in bird and reduction of insect-pests and diseases.

Key words: population dynamics, male, ephippium, Moina irrasa, edible algal density