Improve the survival rate of seedlings

1 Seed quality

The quality of seeds for long-distance transport is a key issue. The seedlings must be trained for more than 2 times before being transported and stopped for food within 2 days before departure. Before dispatching, the seedlings are pulled from the net and caught in a net bucket for a night of raising, so as to excrete feces and mucus. Seedlings must be disease-free, injury-free, physically strong, grass carp seedlings, and wherever conditions permit, it is best to vaccinate them in order to increase the survival rate of transport.

If it is a fry, it should be visible to the naked eye and the body should be shipped lightly black. If the fry has been eaten, it should be fed 1 egg yolk before departure and about 500,000 fry should be fed 1 egg yolk. , 24 hours after feeding, change the water again.

If it is a seed to be diluted, such as Macrobrachium rosenbergii, it should be desalinated before it can be shipped. Otherwise, it will die in large numbers.

2 Shipping methods

For different specifications and different varieties of seedlings, appropriate shipping methods should be adopted. Specifications up to 6 . 7cm above the fish species, should adopt oxygenated shipment of fish gills, which is conducive to changing the water on the way; specifications have not yet reached 6.7cm seedlings, should adopt plastic bag oxygenation shipment, which is conducive to saving manpower; on the Tanggu skin Breeding seeds (small size) should be shipped in large plastic buckets. The mouth of the barrel should be sealed with a plastic film. A small sip in the center of the plastic film can be used without oxygenation. Otherwise, the rate of reactivation is low. Crisp seedlings such as squid should be transported by oxygen in plastic bags. For tilapia and other highly pungent seedlings, it is advisable to use oxygenated rods for transport, as the thorns are likely to pierce the plastic bag.

3 Several problems that should be noticed when transporting

3.1 The density of various shipping methods should be moderate, and lean or dense can cause unnecessary losses. According to seed specifications, long-distance roads, water temperature, water quality, and availability of reserve oxygen.

3.2 Careful plans should be made before transportation, such as the time of loading the fish, the time of departure and arrival, the manpower of the destination to fish, and the arrangement of tools.

3.3 Water for transporting fish must be clean and fresh, chlorine-containing tap water, pond water and contaminated water must not be used. During the transportation, water or water must be added, and the ground temperature difference cannot be too large. Generally, the temperature difference does not exceed 3°C.

3.4 Pay close attention to the situation during transportation. Water and oxygen should be replaced in a timely manner. In special cases such as the rupture of oxygen bags, positive measures should be taken to remedy the situation.

4 Notices after reshipment

4.1 After the temperature difference seed is transferred to the destination, do not rush to fish the pond. For the seedlings transported by the fish, the water can be pumped in the pond, and the fish can be gradually filled into the fish to ensure that the water temperature of the two can be roughly the same. Only if the fish is transported by oxygen in the plastic bag, the entire plastic bag can be placed. In the pond, wait 5-10 minutes until the water temperature inside and outside the bag is consistent.

4.2 After disinfecting the disinfected seedlings for transport to their destination, the fish should be unloaded into the fish hopper for raising. On the one hand, the survival rate of the transport can be counted, the fish that is about to die can be removed, and on the other hand it can be disinfected. . After long-distance transportation, the seedlings have more or less damage to the seedlings. In addition, sterilization can also prevent bacteria from being brought back to the local area.

4.3 Water Quality Requirements Before the seedlings are transported, they must first understand the water quality of the original place. The water quality of the seedlings transferred back to the lower pond should be consistent with the water quality of the original pond, and cannot be too different. After waiting for the fish, the water quality will be gradually changed according to the requirements of water quality adjusted by the seedlings.

4.4 Feeding methods After the seedlings are transferred back to the lower pond, the feeding and management shall be strengthened. The feeding shall be done in a manner consistent with the method of feeding in situ, and then gradually converted according to local feeding habits. If the raw material is fed, the refined feed should be fed after the ship is transported, and then the habit of feeding the green feed can be gradually converted into the habit of feeding the green feed. Do not immediately change their eating habits, otherwise it will cause a lot of death.

Light Amber Halves Walnut Kernels

only divided by color, the quality , the size , the taste are as well as the light halves

different types of the walnut has the different color of the skin of the Walnuts kernels , the little darker color of the light amber color halves is only caused by the different type of the walnuts naturally.

Light Amber Halves Walnut Kernels,Standard Walnut Kernels Light Amber Halves,Walnuts Kernels Light Amber Halves,Light Amber Walnut Kernels Halves

Weishan Yuanxing Walnuts Co.,Ltd. , https://www.walnutsxxy.com