Based on the sow's body condition and physiological characteristics, the following three feeding methods can be used:
One, "grasping two in the middle" method
This method is suitable for slaughtered sows with poor nympancies after weaning, and these pigs account for the majority of pigs. From the first 10 days of breeding to the 20th day of pregnancy, the concentrate was fed. After the medium-term body condition was restored, it was mainly fed with green coarse material and fed according to the feeding standards. In the latter part of the pregnancy, 80 days after the pregnancy, the concentrate was fed.
Second, the "pre-coarse" method
This method is suitable for pre-breeding sows with better body conditions. Because the fetus is very small at the beginning of pregnancy, and the sow's sensation is good, the nutrient needs before the breeding can be fed to the green roughage in the diet, which basically can meet the needs of the growth and development of the fetus, and then feed the concentrate later.
Third, the "step by step" method
This method is suitable for the production of sows. This is mainly because the primiparous sows are still in a stage of growth and development, and the nutrients needed are large. Therefore, the nutritional level throughout the pregnancy is gradually increased according to the increase in the weight of the fetus, reaching the peak one month before delivery. No matter which type of sow, late pregnancy (90 days to 3 days before delivery) requires short-term superior feeding. One way is to feed more than 1 kilogram of mixed concentrate per head per day. Another approach is to add animal fats or vegetable fats (5-6% of the diet) to the original diet.
It takes at least 2 months for Pacific saury to be directly sold or processed.How to effectively maintain the nutritional value and flavor of saury has also become a research hotspot. At present, the easiest and most effective way to store saury is freezing. The lower the freezing temperature is, the more beneficial it is to maintain the quality of saury. It can only be stored for 180 days at -20°C, and -30°C is the suitable temperature for freezing saury.
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