From the seedlings into the pond until the seed is harvested, it takes about half a year for cultivation and management. This period of time coincided with the midwinter season. Frequent natural disasters occurred. Cold waves, storms, rain, snow and ice came one after another and brought serious threats to the seedlings. Due to the seedlings that had just entered the pond, the burrows were shallow and extremely easily frozen to death. To this end, it is necessary to strengthen the management of seedling ponds and timely repair the pond embankments so as to avoid leakage of seedling ponds. At the same time, it is necessary to prevent humans from trampling or fishing in ponds. In particular, it is forbidden for ducks to enter ponds to feed on seedlings. Seedling ponds and drains should be kept open for drainage. When there is no water in the pond or when the “oil sludge†(feeding diatoms and seedlings attached to the surface) is thin, the water outlet should be properly raised so that after the tide ebbs, there is still a thin layer of water in the pond and the painted surface will not Aging dry. However, when the smeared surface is too thin or where there are many silt deposits, the water inlet can be dug lower, so that the accumulated water in the pond after the tide is eliminated as quickly as possible.
About 20 days after the advent of the seedlings, seedlings can see dense holes in the seedlings. This is the breathing hole of the seedlings and can be clearly exposed after the ebb. At this time, if the coating quality is too thin, the hole will be blocked by the floating mud and cannot be unfolded. This will cause the seedlings to be forced to migrate out of the pond due to environmental discomfort. To this end, for seedling ponds with too thin coating quality, a ditches leading to the outside of the pond should be excavated around the pond dike to facilitate the outflow of the pond water, reduce the moisture content of the coating, and facilitate the stable attachment of the seedlings. Miaotang in the high tide area should be closed for 3 days to 4 days during the small water period, which is beneficial to improve the softness of the coating. The sand-coated nursery ponds located at the high tide are due to the rapid heat dissipation and low temperature. They must be stored and insulated to prevent seedlings from freezing and prevent the seedlings from freezing. One month after the water is turned off, the water is released after the weather warms up. If the seedling pond does not turn off water, it must have an inclination so as to eliminate the accumulation of water in the pond and prevent the seedlings from freezing and freezing the seedlings.
Do a good job in the management of seedling ponds, pay special attention to the management of pond water and the prevention and control of bird pests.
1. Pond water management. The management of the pond water should be combined with the closing of water and the discharge of water. 20 days after the last batch of seedlings was attached to the pond, the weather had turned cold and the pond had to be insulated from water until the spring of the following year when the warming began. After the water is released, the seedlings will be released for stocking after being exposed for 1 month to 2 months.
In heavy rain, high winds, snow or ice, Miaotang should maintain a water level of 30 cm. Because heavy rain will destroy the smooth surface of the smeared seedlings, the seedlings will be immersed in low-salinity seawater and affect normal growth. The storm will take away the pond mud and flush the seedlings with muddy water out of the pond; the cold will cause the mud to freeze Miao frozen to death. By closing the water, the ability of seedlings to resist natural disasters is enhanced and the seedlings are safe for winter. At the same time, Guanshui can also play a role in improving the coating quality of the coated surface.
In warm weather, the seedlings can be exposed to a few tides. With the fluctuations of the tide, excessive floating sediments are deposited in order to improve the habitat of the seedlings. After the beginning of spring, when the seedlings are approaching 1 to 2 months before catching, they should release water in a timely manner and the tides should enter the tide to enhance the dehydration and dehydration training of the seedlings, so that the seedlings can perform the necessary up and down movements in the caves. Improve the digestion and absorption rate of seedlings, and at the same time, through the dew-exertion exercises, the seedlings can be adapted to the characteristics of the tidal fluctuations of the natural sea area after sowing.
In addition, the management of pond water should also be combined with deep water and shallow water. Warm weather should be closed shallow water (about 15 cm), so that the painted surface to receive more light, in order to promote the painted surface "mud" breeding and growth, increase food organisms, and promote the growth of seedlings. In severe cold weather, the water level should be deepened (about 30 cm or more) to prevent freezing damage.
2. Prevention of bird damage. The harm of bird pests to the seedlings manifests itself in two aspects: one is that it can directly feed on the seedlings, and the other is that its feces produces certain toxic effects on the seedlings. The birds that harm seedlings mainly include:
(1) Wild Duck: This is also known as Mallard Duck, which is a kind of migratory bird. Every autumn and winter, the flocks fly to the south of the country for winter. It feeds on small animals in the intertidal zone. When the tide just rises on the painted surface, it flies to the fields for food.
(2) White Stork: Also known as the red-billed duck, it is a larger migratory bird. It often roams in streams and ponds. They huddle in circles to search for food. Each year from October to November to fly to Putian, eating crickets, a white pelican is said to be a tide to eat 30 to 40 prickly heat, serious damage.
(3) Seagulls: They often circling on the surface of the sea, and quickly find themselves in the paddy fields and dive in the water. The sea gulls live in gregarious groups. When it finds food, it makes a call and groups of seagulls rush to hear it. The main hazard is the shallow seedlings.
There are two main measures for the prevention and control of seabirds. One is the arrest of Zhangwang. That is, large eye blocks are set around the seedling ponds. The use of birds is unclear at night, and they are easily caught on the Internet and cannot be taken off. The block height is 2m~3m, and the mesh is 15cm. It is supported by a bamboo pole on the painted surface. The second is to use sound and light to disperse the seabirds. For example, petrol lamps or "silk wire" (a plastic ribbon tied to bamboo rafts, and the sound of harsh winds) on the pond embankment are used to slay or smash or firecrackers. After flying.
About 20 days after the advent of the seedlings, seedlings can see dense holes in the seedlings. This is the breathing hole of the seedlings and can be clearly exposed after the ebb. At this time, if the coating quality is too thin, the hole will be blocked by the floating mud and cannot be unfolded. This will cause the seedlings to be forced to migrate out of the pond due to environmental discomfort. To this end, for seedling ponds with too thin coating quality, a ditches leading to the outside of the pond should be excavated around the pond dike to facilitate the outflow of the pond water, reduce the moisture content of the coating, and facilitate the stable attachment of the seedlings. Miaotang in the high tide area should be closed for 3 days to 4 days during the small water period, which is beneficial to improve the softness of the coating. The sand-coated nursery ponds located at the high tide are due to the rapid heat dissipation and low temperature. They must be stored and insulated to prevent seedlings from freezing and prevent the seedlings from freezing. One month after the water is turned off, the water is released after the weather warms up. If the seedling pond does not turn off water, it must have an inclination so as to eliminate the accumulation of water in the pond and prevent the seedlings from freezing and freezing the seedlings.
Do a good job in the management of seedling ponds, pay special attention to the management of pond water and the prevention and control of bird pests.
1. Pond water management. The management of the pond water should be combined with the closing of water and the discharge of water. 20 days after the last batch of seedlings was attached to the pond, the weather had turned cold and the pond had to be insulated from water until the spring of the following year when the warming began. After the water is released, the seedlings will be released for stocking after being exposed for 1 month to 2 months.
In heavy rain, high winds, snow or ice, Miaotang should maintain a water level of 30 cm. Because heavy rain will destroy the smooth surface of the smeared seedlings, the seedlings will be immersed in low-salinity seawater and affect normal growth. The storm will take away the pond mud and flush the seedlings with muddy water out of the pond; the cold will cause the mud to freeze Miao frozen to death. By closing the water, the ability of seedlings to resist natural disasters is enhanced and the seedlings are safe for winter. At the same time, Guanshui can also play a role in improving the coating quality of the coated surface.
In warm weather, the seedlings can be exposed to a few tides. With the fluctuations of the tide, excessive floating sediments are deposited in order to improve the habitat of the seedlings. After the beginning of spring, when the seedlings are approaching 1 to 2 months before catching, they should release water in a timely manner and the tides should enter the tide to enhance the dehydration and dehydration training of the seedlings, so that the seedlings can perform the necessary up and down movements in the caves. Improve the digestion and absorption rate of seedlings, and at the same time, through the dew-exertion exercises, the seedlings can be adapted to the characteristics of the tidal fluctuations of the natural sea area after sowing.
In addition, the management of pond water should also be combined with deep water and shallow water. Warm weather should be closed shallow water (about 15 cm), so that the painted surface to receive more light, in order to promote the painted surface "mud" breeding and growth, increase food organisms, and promote the growth of seedlings. In severe cold weather, the water level should be deepened (about 30 cm or more) to prevent freezing damage.
2. Prevention of bird damage. The harm of bird pests to the seedlings manifests itself in two aspects: one is that it can directly feed on the seedlings, and the other is that its feces produces certain toxic effects on the seedlings. The birds that harm seedlings mainly include:
(1) Wild Duck: This is also known as Mallard Duck, which is a kind of migratory bird. Every autumn and winter, the flocks fly to the south of the country for winter. It feeds on small animals in the intertidal zone. When the tide just rises on the painted surface, it flies to the fields for food.
(2) White Stork: Also known as the red-billed duck, it is a larger migratory bird. It often roams in streams and ponds. They huddle in circles to search for food. Each year from October to November to fly to Putian, eating crickets, a white pelican is said to be a tide to eat 30 to 40 prickly heat, serious damage.
(3) Seagulls: They often circling on the surface of the sea, and quickly find themselves in the paddy fields and dive in the water. The sea gulls live in gregarious groups. When it finds food, it makes a call and groups of seagulls rush to hear it. The main hazard is the shallow seedlings.
There are two main measures for the prevention and control of seabirds. One is the arrest of Zhangwang. That is, large eye blocks are set around the seedling ponds. The use of birds is unclear at night, and they are easily caught on the Internet and cannot be taken off. The block height is 2m~3m, and the mesh is 15cm. It is supported by a bamboo pole on the painted surface. The second is to use sound and light to disperse the seabirds. For example, petrol lamps or "silk wire" (a plastic ribbon tied to bamboo rafts, and the sound of harsh winds) on the pond embankment are used to slay or smash or firecrackers. After flying.
Plastic Net,Plastic Netting for Garden,Plastic Trellis Net,Plastic Net Fencing
COFCO HEBEI INTERNATIONAL TRADING CO., LTD. , https://www.cofcohb.com