Nowadays, there are many models in which shrimp and rice are co-produced in many areas. Then in the autumn, it is the harvest season of rice. How to manage the shrimp-rice co-production mode in this stage? What are the key points? Let's take a look at it together. First, rice harvesting Harvesting of rice must be completed at the end of September and early October. Harvesting too late will affect the production of shrimp and the income of the following year. Before harvesting, it is easy to mechanically operate. When harvesting, the rice pile is kept more than 40cm, and the rice straw is directly returned to the field. Second, water planting Planting aquatic plants in rice fields: After harvesting, a small amount of water plants can be planted in rice fields, and one plant can be planted every 8-10 m with a rotary tiller, and Elodea is planted at a plant spacing of 5-6 m. Replenishing Elodea in the furrow: Cut Elodea into 15cm section and insert it by planting at a distance of 3m. After planting the grass, the water should not be too much in one time, the water level can be submerged, and the water level will gradually increase with the growth of the water grass. Third, water level and water quality management After the rice is harvested, the rice field is flooded. The water intake time depends on the rice straw. If the rice straw is greener, it will enter the water after 3-5 days of drying. If the rice straw is yellow, the water will enter the next day. When entering the water, the water level must be controlled. The initial water intake is 10-15cm, and the rice blast can be submerged. The water level will be gradually adjusted with the change of temperature. The adjustment of water level adheres to the principle of shallow-deep-shallow-deep. The specific operation is: October-November, shallow water, keep the depth of the field 10~20cm, December-February, deep water, keep the depth of the field 30~50cm, 3- In early April, shallow water, keep the depth of the field 20~30cm, from mid-April to the end of May, deep water, keep the depth of the field 30~50cm. When the rice is harvested, the rice piles are too shallow, too many rice rods return to the field, or the initial water level is too high, and a large number of rice rods rot rapidly, causing the water to become eutrophic and black and red, and the water body is dehydrated, resulting in crayfish on the grass. , or a large area of ​​death; the best choice for this situation is to change the water, the amount of water change can not exceed 1/3 of the total amount of water, before changing the water, check the filtration and anti-floating facilities of the inlet and outlet to ensure that the facilities are in good condition. Fourth, disinfection in addition to the enemy Crayfish are raised in rice fields, and their enemies are mainly frogs, water snakes, scutellaria, carnivorous fish, water mice and water birds. Every year during the harvest of mid-season rice and before paddy field irrigation, the enemy organisms should be removed in the annular ditch. There are two methods for eliminating enemy organisms: tea sputum disinfection and rotenone disinfection. Tea pot disinfection 30kg per mu, soaked after soaking; rotenone disinfection, 1.5% deep water per acre with 2.5% cream 1300mL or 7.5% EC 700mL, the cream is diluted with water 10 times -15 times. V. Feeding management The autumn crayfish can feed on the natural detritus such as organic debris, zooplankton, aquatic insects, and plexus in the paddy field. It is advisable to feed the animal feed in small amounts. The daily feeding amount is 1% of the weight of the shrimp. According to the activity of crayfish; a decomposed organic fertilizer is applied before December, the dosage is 100~150kg/mu. In March of the next year, the organic fertilizer is applied once a month, and the first is to cultivate plankton for shrimp. The seedlings feed, and the second is the fertilizer to control the growth of moss. The above is all the key points of the autumn management of the shrimp and rice co-production mode. The farmers who have the needs can learn more. The content of the article is reproduced from the headline number Jishan Huayao, and the friends who like it can pay attention! Foot Spa Massager,Bath Foot Massager Machine,Foot Spa Bath,Bath Foot Massager With Bubble Huaian Mimir Electric Appliance Co., LTD , https://www.footspamachine.com
Key points of autumn management techniques for shrimp and rice
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