The one-year plan is spring. The spring temperature slowly rises, and the pro-fish species gradually enters into a good time for feeding and growth. Grasping the breeding and management of the broodstock at this time can promote its early diet, restore constitution, accelerate growth, enhance disease resistance and increase survival rate, and promote gonadal development. It lays a good foundation for the breeding of broodstock. First, sub-pool stocking In order to grasp the broodstock growth and development, and facilitate the deployment of oxytoproliferation, should be at about 10 °C when the water temperature will be concentrated in the larger ponds in the cultivation of broodstock, transferred to a small pond to cultivate. Disinfection of small ponds should be done well before the pooling. Select 100 liters of quicklime per acre for the sunny days. When dividing the pool, the broodstock with good growth and development and the broodstock with poor growth and development should be kept open, and the stocking density should be 120-150kg per mus, and the broodstock placed in each pond can be used up when the production is finished. it is good. The main purpose of the stocking of broodstocks is to promote gonad development, generally using polyculture, which can make full use of water space and feed resources. Second, feeding and fertilizing After the water temperature rises in spring, the broodstock is in a stage of rapid growth and development, and requires a lot of nutrients. The broodstock of the squid is cultivated in the spring and is mainly fed with fertilized and cultivated food organisms. Before filling the pool, the base fertilizer should be applied in the pool. Generally, 300-500 kg organic fertilizer is applied per acre fish pond. The squid brood pool should be given more manure, and the scorpion fish pond should be given more excrement. The amount of topdressing should be less than once in order to stabilize the water quality so that the pool water is both "live" and "fat", and the transparency is about 30 cm. The spring cultivation of grass carp broodstock should be dominated by green material, supplemented with fine material. Pre-feeding of grain buds, malt, buckwheat cakes, etc., and early feeding of lettuce leaves, ryegrass, etc., and then transferred to only cast green feed. Near the ovulation period, the food intake of gonads of mature grass carp will be significantly reduced or even stopped feeding. Herring broodstock is mainly fed with snail meat, supplemented with bean cake or compound feed. In order to improve the breeding effect, it is generally required to feed a fully-fed artificial compound feed in order to enhance the body composition of the fish and accelerate its growth. When the water temperature on the surface of fish ponds rises to about 10°C, fish begin to feed a small amount and they can start feeding. The amount of feeding should be increased or decreased according to the water temperature and the feeding and feeding conditions of the broodstock. Third, adjust the water quality After the spring, the depth of the pool water control in about 1 meter, will help the water temperature rise, promote the growth and reproduction of food organisms, but also conducive to the feeding of broodstock. Pro-fish ponds should always be flushed with fresh water to keep the water fresh and increase the amount of dissolved oxygen in the water. Before the spring feeding and fertilization, the old water in the pool should be replaced by half, and new water should be added to maintain the water depth at about 1 meter. This will help increase the temperature of the pool water and the energy conversion of the pond and promote the growth and development of the broodstock. At the same time, flushing in spring is also an important measure to promote gonad development in broodstock. According to experts, brooding brooding ponds are generally flushed twice a month, grass brooding ponds are flushed twice a month, each time adding 5 to 10 centimeters of water; before puerpera, brooded broodstock and brooded broodstock are on a weekly basis for 1 to 2 days. Flush the water once, or make the water into a microfluidic state, and the grass broodstock flushes water once a day for 2 to 3 hours before the half-time of production. The entire cultivation process of the grass broodstock pond should keep the water fresh. Its transparency is kept above 35 cm. Fourth, to strengthen the management of sunny days to timely drainage to reduce the water level of the fish pond, and accelerate the water temperature of the fish pond. When rainy days or cold air comes, it is necessary to fill the pool water in advance to slow the cooling of the pool water. Regularly clean and clean food platforms to prevent and control diseases. When the new water is added, blocking facilities should be installed to prevent the enemy from entering the broodstock. It is necessary to manage the training of broodstock, full-time staff management, and special feed feeding. The management work must be strict and strict. Every day, it is necessary to inspect the water quality, observe the water quality, observe the fish condition, and check whether there is any increase or decrease in fish food consumption and water quality. Situation to determine the amount of feed and fertilizer. If panpool warning or severe floating heading is found, new water or aerator must be added immediately. Fifth, the prevention and treatment of broodstock disease in spring, on the one hand, due to the separation of ponds, stocking and other operations, causing broodstock mechanical damage, opened up a channel for bacterial invasion. This type of fish disease mainly includes saprophytic disease, vertical scale disease, and gill disease. In addition, diseases such as red skin disease, acne, and print disease can also occur. On the other hand, the broodstock in spring is overwintering and the constitution is weak. At this time, certain parasites occur in large numbers and can invade the fish. Therefore, in the spring, the principle of “prevention from prevention and combination of prevention and treatment†should be implemented. In the spring of every spring, 20 kilograms of quicklime should be sprinkled with water to adjust the water quality and enhance the buffer capacity of the water body. If parasites occur, copper sulphate and ferrous sulphate may be sprayed with the agent water. When a disease occurs, professional technicians should promptly make a correct diagnosis and apply the medicine. Around the broodfish pool, it is usually quiet, and human and livestock activities are minimized to create a good environment for the broodstock. Sprinkler irrigation and micro-irrigation automatic control equipment With the development of economy, water resources, energy shortage and labor cost increase, more and more water-saving irrigation systems will adopt automatic control. This article focuses on the advantages and classification of automated irrigation. 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The advantages are as follows:
(1) It is possible to truly control the amount of irrigation, irrigation time and irrigation cycle in a timely and appropriate manner, thereby increasing crop yield and significantly improving water utilization.
(2) Saving labor and operating expenses.
(3) The work plan can be arranged conveniently and flexibly, and the management personnel do not have to go to the field at night or other inconvenient time.
(4) Since it can increase the effective working time every day, the initial capital investment in pipelines, pumping stations, etc. can be reduced accordingly.
classification:
First, fully automated irrigation system
The fully automated irrigation system does not require direct human involvement. The pre-programmed control procedures and certain parameters that reflect the water requirements of the crop can automatically open and close the pump for a long time and automatically irrigate in a certain order. The role of the person is simply to adjust the control program and overhaul the control equipment. In this system, in addition to emitters (heads, drip heads, etc.), pipes, fittings, pumps, and motors, it also includes central controllers, automatic valves, sensors (soil moisture sensors, temperature sensors, pressure sensors, water level sensors, and rain sensors). Etc.) and wires.
Second, semi-automatic irrigation system
In the semi-automated irrigation system, no sensors are installed in the field. The irrigation time, irrigation volume and irrigation period are controlled according to pre-programmed procedures, rather than feedback based on crop and soil moisture and meteorological conditions. The degree of automation of such systems is very different. For example, some pump stations implement automatic control, and some pump stations use manual control. Some central controllers are only one timer with simple programming function, and some systems have no central control. The controller, but only some of the sequential switching valves or volume valves are installed on each branch pipe.
Automated irrigation is the trend of the times. In the future water-saving irrigation projects, more and more automated irrigation systems will be applied.