How is it that the per-mu yield of a fish pond can reach over a thousand jin?

SummaryThe per-mu yield of fish farming in ponds is generally around 1000 jin, and with high yields it can reach around 4000 jin. Different fish species and rearing methods will affect the yield. Pond fish farming generally adopts a polyculture model, and the stocking density of fish is determined according to the size of the fish species, but it should be noted that before stocking, they must be soaked and disinfected in a 4% salt water solution for about 10-15 minutes.

I. Per-mu yield of pond fish farming

1. Generally, the per-mu yield of pond fish farming is about 1000 jin, but because of different fish species, the per-mu yield also differs. When stocking grass carp, silver carp, mud carp, bighead carp, etc. can be appropriately polycultured. Before stocking, all fish species must be soaked and disinfected in a 4% salt water solution for about 10-15 minutes.

2. Taking 1 mu as an example, for grass carp with a size of 250-500 grams per fish, the stocking density is 400 fish per mu, while for grass carp with a size of 1000-1250 grams per fish, the stocking density is 300 fish per mu.

3. The stocking density of mud carp is 1500 fish per mu; for silver carp with a size of 300-400 grams per fish, the stocking density is 100 fish per mu; for bighead carp with a size of 150-200 grams per fish, the stocking density is 20 fish per mu.

4. During stocking, they can be stocked in 3 sizes: 1-3 liang, 5-7 liang, and a maximum of 1 jin. While harvesting, stock at the same time. About 5 harvests can be made in 1 year, with an average body weight of about 3 jin, and the per-mu yield can reach over 4000 jin.

II. Analysis of fish farming profit for a 10-mu fish pond

Taking a 1-mu fish pond as the unit and a per-mu yield of 800 jin as an example, according to the availability of rural fertilizer, feed, fish species, etc., the per-mu yield of silver carp and bighead carp is generally 350 jin, and the yield of feeding fish is generally 450 jin.

Details: 50 jin of bream, 1 jin per fish; 50 jin of bighead carp, 3.5 jin per fish; 100 jin of crucian carp, 0.8 jin per fish; 300 jin of grass carp, 6 jin per fish; 300 jin of silver carp, 2 jin per fish; 300 jin of silver carp, 2 jin per fish,

The estimated total income is: 3002.5+504.5+4505=3225 yuan.

The total income of a 10-mu fish pond is: 10*3225 yuan=32250 yuan.

Based on this, calculated per mu, it is necessary to stock 3 jin of bighead carp, 0.2 jin per fish, 15 fish; 5.5 jin of bream, 0.1 jin per fish, 55 fish; 14 jin of crucian carp, 0.1 jin per fish, 140 fish; 34 jin of silver carp, 0.2 jin per fish, 170 fish; 52.5 jin of grass carp, 0.7 jin per fish, 75 fish.

Total stocking amount: 37 jin of silver carp and bighead carp, 72 jin of feeding fish, totaling 109 jin. By the end of the year, the net weight gain of silver carp and bighead carp is 313 jin, and the net weight gain of feeding fish is 378 jin.

Fish species stocking price: calculated at this year's fish species prices, it is 341.6+32.8+52.55.5+5.55+144=435.05 yuan.

The fish species input for a 10-mu fish pond is: 435.05 yuan*10=4350.5 yuan.

Calculated according to high-quality fertilizer and feed on the market, each year requires an input of 281.7 jin of fertilizer, 281.7 yuan. Feed is 756 jin, 1200 yuan. According to general rules, water and electricity costs are 50 yuan per mu, and medicine costs are 70 yuan per mu.

Each mu requires a total input of 2036.75 yuan for fish species, feed, fertilizer, water and electricity, medicine, etc., and the return on investment for fish farming is about 60%.

A 10-mu fish pond for fish farming requires an input of: 2036.75 yuan*10*0.6=12220.5 yuan. Through the analysis of the above results, the fish farming profit of a 10-mu fish pond is 32250-4350.5-12220.5=15679 yuan.