The invention discloses a method for ecologically fattening and regulating quality of pond breeding river crabs, which comprises steps: preparation of a fattening pond, selecting and
stocking of crabs,
salinity regulation of fattening water, daily management and
fishing and marketing. The method for ecologically fattening and regulating quality of pond breeding river crabs artificially creates suitable
salinity conditions and feeds high quality baits according to the influence of water
salinity to
gonad development and physiological
metabolism of
eriocheir sinensis, and improves fattening effect and quality of merchandise crabs. The method for ecologically fattening and regulating quality of pond breeding river crabs is characterized in that male and female crabs are separately fattened, suitable water salinity (male crabs are 10-15ppt, female crabs are 5-8ppt) is selected, fine sands are paved on the bottom of the fattening pond,
oxygen is charged from micropores which are arranged on the bottom portion of the fattening pond, and the male and female crabs are scientifically feed. Gonadosomatic index of female crabs is increased to about 8% from initial about 4% through scientific fattening for 30-40 days, the gonadosomatic index of male crabs is increased to about 3% from initial about 1%, and the radios of
survival rate of fattening and high quality green crab respectively achieve above 80% and 70%, thereby improving taste, nutritive value and economic value of river crabs. The method for ecologically fattening and regulating quality of pond breeding river crabs is suitable for river crab breeding enterprises, breeding farmers and marketing units, and is beneficial to improve breeding efficiency and
nutritional quality of river crabs.