Study On Planting And Breeding Patterns Of Grass-Base-Fishpond In Low-lying Areas Around Dongting Lake

In this paper, economic benefits and ability of disaster prevention of agricultural model in lowland areas was investigated around Dongting Lake. The yield and nutritional quality of forage grass varieties (germplasm) was comprehensively analysed to find some forage varieties suitable for fish.The yield, and nutritional quality of planting grass mode combinations of clustering was analysed to find the optimal planting grass mode. The production performance, body mass index and nutritional quality of the four major Chinese carps under different treatments was investigated with the comprehensive analysis.The main results are as follows:11Effect of Escaping Meteorological disaster on grass-base-fishpond at lowland areas around Dongting LakeThe results showed that the ratio of output to inpu of Grass fish pond model is1.44:1,which is the highest,the rate of the traditional feed for fish, rice rape+winter fallow,rice,double cropping rice fallow was1.19:1;1.17:1;1.22:1respectively. Grass-base-fishpond model was the best in economic benefits and ability of disaster prevention of agricultural model in lowland region.2Fish forage selectionThe analysis of yield.nutritional quality and amino acid nutritional quality of different forage,the same forage with different planting area and fodder ramie varieties; its comprehensive properties and comparation with the nutrient requirements of grass carp, was carried out,the resuts showed that xiangsizhu X3、xiangsizhu XI, xiangzhu no3is appropriate forage varieties to breed Grass Carp, the crude protein content more than25%,sulfur amino acid more than0.70%, lysine up to1.17%,;the essential amino acid requirements can reach9.70%.3,Planting and breeding modeThe yield and nutritional quality of forage grass varieties (germplasm) was comprehensively analysed to find some forage varieties suitable for fish.The yield.and nutrition quality of planting grass mode combinations of clustering was analysed to find the optimal planting grass mode. The production performance, body mass index and nutritional quality of the four major Chinese carps under different treatments was investigated with the comprehensive analysis, The results showed that the best planting model was the one of planting xiangsizhu XI around the fish pond in non winter with Intercropping ryegrass in winter and spring,and planting ryegrass in the bottom of the pool during dry period in winter, planting water spinach on the water in non winter...