What should be paid attention to when farmed soft-shelled turtle seedlings start eating?
The feeding of soft-shelled turtle seedlings is an important operation link in the cultivation and production of soft-shelled turtle seedlings. In the past. We feed the soft-shelled turtle seedlings by soaking them in a basin with 3% feed slurry water for 3 hours in order to allow the soft-shelled turtle seedlings to swallow and smell the feed before stocking. After stocking, Eli can quickly identify the feed to eat. However, after several years of practice, it has been found that this feeding method does more harm than good, one is that the feed slurry is unable to swallow and can not play the role of eating, but a waste of feed; the other is that soaking in the feed slurry for a long time not only causes soft-shelled turtle seedlings to scratch each other, if the feed slurry is slightly thicker, it will also cause the feed slurry to block the nostrils of soft-shelled turtle seedlings, resulting in the suffocation and death of soft-shelled turtle seedlings. Third, in this feeding operation, there is one more link of man-made damage to the body of soft-shelled turtle, leaving a hidden danger for the occurrence of skin rot after release of soft-shelled turtle fry. Therefore, the feeding of soft-shelled turtle fry is good or bad, not only affect the survival and growth of soft-shelled turtle fry, improper treatment will also cause a large number of soft-shelled turtle fry death.
For example, in May 2002, a soft-shelled turtle farm in Shaoxing soaked high-density soft-shelled turtle seedlings with high concentration feed pulp in plastic pots, resulting in the death of more than 2000 soft-shelled turtle fry after eating for 5 hours. The correct method is introduced as follows: first of all, fertilize the pond water 5 days before stocking, the standard of fertilizer water is grayish white or light green, the transparency is not more than 20 cm, pH7~8. After stocking, sprinkle the soft pellet feed with 8% body weight on the feed board in the pond, and at the same time, sprinkle a little 1% feed slurry around the feed board. This direct feeding method not only adapts turtle seedlings quickly and eats well, but also greatly improves the survival rate.
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Prevention and treatment of acute poisoning of river crab cultured in river crab
There are two symptoms of acute poisoning of river crab: 1) toxic factor, because of the strong invasion, in a relatively short time, through the Gill and triangular membrane of the river crab, the posterior edge of the dorsal nail of the river crab shows false molting, or the triangular membrane is red or black mud, or the abdominal navel of the river crab.
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Four-look feeding method for breeding laying ducks
First, look at the weight feed to determine the feed quality and feed quantity according to the body weight and laying rate of laying ducks: (1) the laying rate of ducks is still more than 80%, while the weight of ducks tends to lose slightly. At this time, the animal feed should be fed properly (fresh snail is better).
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