Autotrophic profit: According to the current pig price of 6.5 yuan/kg, the breeding profit of a pig is 6.5 yuan/kg *200 kg-the cost is 865=435 yuan, and the profit rate is 50%. The calculation is as follows:

1. Annual feeding cost of sows: based on 5 kg feed/head per day, 365 days *5*0.9 yuan/kg * day = 1642 yuan per year, plus epidemic prevention cost 100 yuan, and other miscellaneous expenses, up to 2,000 yuan. Theoretically, a sow gives birth to 2.45 fetuses a year. If you count two nests, the average nest is one 10, so you count eight nests. The cost of a piglet is 2000 yuan/16= 125 yuan/head.

2. Feed cost: Piglets usually eat suckling pig feed (granules) before 30 kg, if one kg is counted in 2 yuan, they will eat 1.2 kg in lactation for 30 days, and the cost of growing to 30 kg is 30* 1.2*2=72 yuan, if it is counted in 80 yuan.

30 kg to 200 kg fattening pigs, fattening pigs eat compound feed (that is, 20% concentrate and 80% corn, divided into three stages). Theoretically, the average feed-meat ratio is 3: 1, and the feed used is 3*(200-30)=5 10 kg. No matter how bad the pig farm is, it needs 600 Jin of feed. Feed per catty 1. 1 yuan (feed concentrate 2.5 yuan *20%+0.6~0.7 yuan *80%= 1.06), that is, 660 yuan.

3. Total cost: 125 yuan (the cost of sows giving birth to piglets) +740 yuan =865 yuan.

Extended data:

Matters needing attention in raising pigs

1. Sows play an important role in the reproductive process. If the sow is well fed, the piglets born will naturally be healthy. And feed some good feed to the sow, let the sow eat well, and the sow's breast milk will naturally be fine. Piglets eat good breast milk, and their immunity is enhanced, which will make the whole herd healthy, so sow feed is very important.

In the process of growing up, pigs eat the most in middle school. In the middle of the pig period, farmers will feed pigs with a lot of feed, which will increase the cost, so farmers need to control the cost at this stage.

3. When pigs grow to the middle stage, the requirements for feed quality are not so high, so farmers can feed them with mixed feed at this stage, as long as the feed can ensure that it is not moldy and has not passed the shelf life. Farmers can also choose to replace some corn and soybean meal.