What kind of water plant is good for crayfish
4hw.com.cn: the survival rate of crayfish cultured in ponds with plenty of aquatic plants is very high. There is such a saying, "how many shrimp, look at the aquatic plants.". So, why grow aquatic plants to raise crayfish? Also, what kind of water plants do crayfish grow?
What kind of aquatic plants do crayfish grow
There are three kinds of aquatic plants in crayfish culture: submerged plants, floating plants and emergent plants. Generally, submerged plants and floating plants are mainly planted, and emergent plants are supplemented.
1. Submerged macrophyte
Submerged macrophyte is a kind of macrophyte whose plant is located under the water layer. Sometimes their roots are undeveloped or degenerated. All parts of the plant can absorb water and nutrients. The aerenchyma is especially developed, which is conducive to gas exchange in the absence of air in the water. The leaves of these plants are mostly banded or filiform.
The main varieties are Elodea, Vallisneria, Potamogeton crispus, Potamogeton malayi, Ceratophyllum, etc.
2. Floating plants
Floating plant or floating leaf plant, growing in shallow water, leaves floating on the surface, roots growing in the underwater soil. The roots of floating leaf plants are generally lack of oxygen, so the anaerobic respiration can produce alcohols, and the oxygen can be supplied by the leaves through the petioles. The petioles can stretch very long to adapt to the water depth. There are also some plants with different shapes of leaves and floating leaves in water.
The main varieties are Alternanthera philoxeroides, water hyacinth, water hyacinth, duckweed, etc.
3. Emergent plant
Emergent plants refer to the plants whose roots and rhizomes grow in the sediment and whose stems and leaves stand out of the water. It is usually distributed in 0-1.5 meters of shallow water, some of which grow on the wet shore. The air part of these plants has the characteristics of terrestrial plants. The part growing in water (root or underground stem) has the characteristics of aquatic plants.
The main varieties are reed, water bamboo, arrowhead, cattail, etc.
Why grow aquatic plants for crayfish
Whether it's a pond or a rice field where crayfish are raised, it's necessary to plant aquatic plants. There's a saying that if you want to raise a good pond of shrimp, you must first grow a good pond of grass. So, what is the role of aquatic plants in crayfish farming?
1. Enrich the field feed
Crayfish's food is very miscellaneous, mainly animal, but the water and grass are fresh and refreshing, rich in nutrition, crayfish are also very fond of, is the supplement and regulation of animal feed.
Aquatic plants can create a good ecological environment. Where there are many kinds of aquatic plants and the growth is dense, there are relatively abundant benthic animals such as small fish, shrimp and shellfish. Therefore, planting aquatic plants can increase the food for crayfish in the field.
2. Improving water quality in the field
Aquatic plants can carry out photosynthesis, increase dissolved oxygen in water, absorb nutrients in water, reduce water fertility, keep water fresh and stable pH value, so as to provide water environment with good water quality and rich dissolved oxygen for the growth and development of crayfish.
3. Promote the growth of crayfish
Water grass is an ideal habitat for crayfish, which is conducive to its climbing and provides support for its activities. Because of the concealment effect of aquatic plants, it can provide a good place for shrimp molting and help crayfish avoid enemies. In high temperature season, water plants can shade and cool down, which is a good place for crayfish to cool off. Moreover, aquatic weed has special pharmacological effects, which can reduce the incidence rate. Aquatic plants can improve the internal and external quality of crayfish.