Many farmers and friends in the countryside have their own fish ponds, but some have big, fat fish in their homes, and others are hard to feed, which may be related to their productivity! What's the proper density in the pond
Feeding density: a reasonable feed density (or stocking) ensures that fish or species are rearing for the desired duration of the rearing period. Density (feasibility) can be expressed in the end and weight of the species. There are both empirical and computational methods for determining the level of deregulation in production。
Empirical means that this year's feed density and specifications are determined on the basis of the survival rate and actual growth specifications of the fish that the pond has raised in previous years, and that if last year's nutrient specification is smaller, it should be reduced this year; instead, it should be increased。
Calculating: a general pond, without taking into account the weight of the species, can be calculated according to the following empirical formula. Consumption per acre = estimated gross production per acre/(planned fish specification x estimated survival rate) species feed specifications (kg/tail) = planned fish specification (kg/tail)/estimated multiplier root
Based on the current level of aquaculture in my province, fish pond acre production is typically 300-400 kg, and refined pond acre production is 500-600 kg. In the case of grassfish and carp, for about eight months, the survival rate for savannah species (above 50 g/tail) was 7-10 times greater than 75-80 per cent; and for carp (above 50 g/tail) it was 92-95 per cent greater than 6-7 times greater. The survival rate of thorium and thorium is about 95 per cent, with a multiplier of 5-7 times。
Example 1: a 1-acre pond is prepared to feed herbs, platinum, platinum, with a planned fish yield of 400 kg, each fish yield and specification: grassfish 250 kg, 1 kg/tail; thorium 100 kg, 0. 5 kg/tail; thorium 50 kg, 0. 75 kg/tail. Ask how many species would need to be dropped and what were the specifications for each fish to feed
Based on the current minimum production level in our province:
Strawfish: herbfish consumption = planned herbfish production/(student fish out of ponds x minimum survival rate) = 250 kg/1 x 75% = approximately 330 tails, if measured by a minimum weight multiplier, the maximum specification for herbfish at feeding = a pond specification/multiplication = approximately 140 g/tail; and at a maximum weight multiplier of 10, the minimum specification for herbfish at feeding is 100 g/tail。
Pyramid species feed = planned peptide production/(student-out pond specification x minimum survival rate) = 100/(0. 5 x 95%) = approximately 210 tail peptide species feed at 70 ~ 100 g/tail。
Pyramid species feed = planned production/(polymeric pond specification x minimum survival rate) = 50 (0. 75 x 95 per cent) = approximately 70 tails. The size of the species is 100-150 g/tail。
"tittle" = "sipley" /
The total catch of the pond species is = (grass fish + poach) = 330 + 210 + 70 = 610 tails. As the water quality of ponds, the variety of feed and daily feeding are closely related to fish production for consumption, flexibility should be exercised when considering the amount of stock to be fed from the original species. The usual number of tails per acre of conventional species is about 600-1200 tails, yellowfish and clouds. The concentration of fish in the main fish pond can increase to 1,500 ~2000 tails。
Fish density in ponds is mainly related to fish species and size. For fish of larger sizes or growing faster, farm density can be controlled less, and for fish of smaller sizes and slower growth, early farm density can be larger. And at different times of fish growth, there are density adjustments to adapt to changes in fish size。
