This submerged plant is widely distributed in China. It likes warm environment and is not strict with soil. Besides being planted in a shrimp pond to provide food for crayfish and purify the water in the shrimp pond, it can also be used as a Chinese herbal medicine.
Third, hydrilla verticillata.
This is a perennial submerged plant, which likes high temperature environment, has strong adaptability, long growth period and is convenient to plant. Even if its branches and stems are cut off by lobsters, it can continue to take root and grow into new plants. Therefore, there is a saying in rural areas that "Hydrilla verticillata takes root step by step", which is a very suitable aquatic plant for shrimp ponds.
Planting method for cultivating crayfish aquatic plants
Insertion method. Hydrilla verticillata, Elodea nuttallii and other aquatic plants with stems are suitable for transplanting, and they are generally planted in winter and spring. The method is to cut the aquatic plants into small pieces with the length of15 ~ 20cm. Like transplanting rice seedlings, evenly transplant bundles of cut grass into the mud at the bottom of the pond, with the plant and row spacing controlled at about 20cm respectively. After transplanting, fill the shrimp pond with water for 20 ~ 30 cm, and gradually deepen the water level after the aquatic plants grow all over the pond.
Throwing method. Floating-leaf plants such as water lilies and water lilies can be wrapped in soft mud and directly thrown into the pond, so that their roots can grow in the sediment and their leaves can float on the water.
Transplanting method. The emergent plants such as Zizania latifolia and Sagittarius sagittarius should be transplanted by roots. When transplanting, the damaged leaves and slender and inferior seedlings should be removed. The transplanting position can be in the shallows near the pool, and the root water of the seedlings should be10 ~ 20 cm, and the density should be controlled at 30 ~ 50 trees/mu.
Cultivation method. For floating plants such as Alternanthera philoxeroides, water hyacinth and duckweed, bamboo poles and straw ropes can be used in a corner of the pond as a "special zone" for intensive cultivation, so that the above aquatic plants can grow and reproduce in the "special zone" environment as a supplement to the shortage of aquatic plants in the shrimp pond.
Sowing method Generally, the most commonly used aquatic plants are Vallisneria angustifolia. Sophora alopecuroides adopts sowing method, which is suitable for shrimp ponds with less silt. Soak the seeds of Sophora alopecuroides L. in water for one day, then crush the softened fruit to get tiny seeds, add fine sand about 10 times the amount of seeds, mix well with the seeds and sow. When sowing, the water level is controlled at10 ~ 20cm, and the sowing amount is about 50g/mu. After sowing, management should be strengthened to improve the survival rate of Sophora alopecuroides and make it form a dominant population as soon as possible.