Dragonflies are amphibians and reptiles that mainly live in water. They are sexually dirty and dirty. Xiyang is afraid of the wind. The dragonfly lives in the water, but often stretches out of the water to breathe in the air and kisses it. It is less active during the day and it has a protective color. It is grayish or grayish black in the rocky or cave-like caverns; the bottom is yellow muddy water. Life is brown. Sensitive to environmental changes. It is suitable for feeding and growing in the temperature range of 20°C~33°C, and the optimum temperature range is 25°C~30°C. It is a good season for the growth of eel because of strong food and rapid growth. Less appetite below 20°C, no appetite below 18°C, declining vitality, slow movement, stiffness, stop feeding at 15°C, sluggish activity, hibernation at 10°C~12°C, unsustainable in underwater mud, when exceeding 33°C At the same time, the feeding capacity of crickets also weakened. In the middle and lower reaches of the Yangtze River, it will grow into 500 grams in 4 to 5 years, and in the middle and lower reaches of the Yellow River it will take 6 years to grow to 500 grams. The lifespan of crickets is long, generally up to several decades. Cockroaches are omnivorous animals, mainly animal proteins, supplemented by plant proteins. Sexual gluttony and cruel. Cockroaches are dioecious, mated in water, fertilized in the body, and bred. Sexual maturity is longer. In natural circumstances, it usually takes 4 to 6 years of age. If you choose to stay with you, you must accurately determine the gender and make the proportion of males and females appropriate. Generally according to the ratio of male to female 3 to 4:1 stocking specifications are generally the same. The stocking density of the intimacy pond is generally one for every 2 square meters to 3 square meters, and the majority is placed for every 2.5 square meters. When the temperature of the water rises to about 18°C, the pro-pitting pond begins to feed. Generally, the amount of formulated feed per day is 5% of body weight, and if fresh animal feed is used, it is 10% to 20%. Mix feed and low-value fresh fish can also be used for total feeding. In mid-August, the spawning is over and the intimacy of gonads develops into the next week. The postpartum fertility cultivation must not be relaxed, and it is necessary to insist on feeding to hibernation, especially for animal internal organs and snails.
The water temperature rose to 20°C and mating began. The breeding season began basically from early May to early August and lasted for more than three months. Two months after mating, spawning starts. The eggs produced are already in the blastocyst stage. Spawning time is usually from 10 pm to 4 am the next day, especially in the evening after the rain, when the sand is wet. During the entire spawning season, carefully check the spawning grounds for spawning every morning. Press the footprints and the traces of freshly-turned sand. You can extend your fingers to gently determine the position of the spawning hole and make soil marks. But do not Eager to move, because the embryo has not been fixed, premature vibrations affect the development of the embryo.
The incubation period of quail eggs ranges from early July to mid-October. Incubation temperature is generally controlled at 30°C～33°C, and the temperature is less than 15°C. Embryo development stops. Above 36°C, eggs die. At temperatures between 25°C and 29°C, incubation time is generally 50 days to 60 days. Hatching rate and incubation The time is closely related. The longer the incubation time, the lower the hatching rate. Artificial incubation is generally used to increase the hatchability of fertilized eggs and shorten the incubation period. During the incubation period, check the temperature. If it is too high, open the glass (1418, -16.00, -1.12%) to cool down the heat, or lower the temperature to install an incandescent lamp in the tank. Also check the humidity of the sand. When it is dry, sprinkle some water so that the fine sand can be moistened.
After the juveniles start eating, they can be kept in the nursery. Per square meter can be placed 60 to 100, the same batch of hatchlings opened in a pool of baby food. At the beginning, some red worms, cockroaches, zooplankton, etc. were fed, and the daily feeding amount was 10% of the body weight and was fed twice a day. It is best to do "four prescriptions." At the beginning of the breeding period, the general water level just dived to a height of 5 cm above the sand layer. Afterwards, the water level gradually increased with the individual. Pay attention to water quality management, generally change the water every 3 days to 5 days, change the water by 1/3 each time.
In early April, the pupa that are raised with warming in winter are transferred to open-air ponds and must be kept strictly grading. The earthen pond breeding can be single-cultivated, and usually 2 puppies are stocked per square meter; they can also be mixed with fish. In addition to herring and mackerel, the tilapia and squid can be put on the go. Intensive pools generally stock 4 to 8 per square meter, mostly 5 per square meter. The commercial aquaculture uses the larvae and feeds to add some additives, and is processed into granules or strip feeds with a diameter of 4 mm and a protein content of 45%. Or put special feed for loquat, feed should be put in the feed station. More than 2% to 3% of the carcass weight feed, and pay attention to observe the eating situation, in order to eat in one and a half hours. Spring comes out of the greenhouse and can be fed with fresh bait that contains more fat, such as animal organs. The temperature of the water rises above 20°C, and it can be fed with fresh feed containing many proteins, such as snails. The water quality of Chengchi Lake should be relatively fertile and rich in plants. When the water quality is too fat or corrupt, new water should be added in time to keep the water fresh. During the high temperature period in summer, shelters or melons, fruits, and trees must be shaded above the pool; in winter, wind insulation should be used to deepen the pool water.
In order to capture and develop larvae, the method of catching dry ponds or direct dry ponds before catching them is mostly adopted. Net catch can use ordinary single-layer gill nets, three-layer gill nets and Zhang nets. The dry pond catch can be captured in full, by first draining the pool water, and then turning the soil open on one side of the pool to capture the maggots that have sneaked into the sediment. For a pond with a large pool and deep silt, it is difficult to open the silt in the entire pond. The pool water can be drained, and at night, the earthworms in the sediment will automatically climb onto the shallows and can be captured by lighting. Or before the pond is dry, a corner of the pool is covered with coverings such as straw or wood for trapping. After the pool water is drained, many crickets are hidden under the cover and captured. A trap can also be installed near the outlet so that the trap can be trapped as the water falls into the trap.
The transportation of quails is easier than fish, but the following points should be noted on the way:
1. Prevent fighting each other to avoid injury.
2. To prevent dried clam shells, so as not to dehydration. 3. Prevent mosquito bites.
For shipping, you can use a cardboard box 40 centimeters and 40 centimeters high and about 5 centimeters high. Around the bottom of the carton and at the bottom, the lids will be perforated. Put some plants in the box. A box can hold about 500 pieces. In order to transport goods, you can make light wooden boxes. The internal boards are divided into several areas depending on the size of the board. One is placed in each area, making it impossible to move. The bottom is covered with some straw, and it is transported after being tied and then transported. , bottom, cover a few holes. For long-distance transportation, sprinkle some water during transportation to maintain its humidity.
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.
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.
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