The growth of piglets is particularly fast after being broken, which is 10% higher than that of normal pigs, and is slaughtered 10 days to 15 days in advance. The method is as follows:
Prepare a high-temperature-disinfected scalpel, single-sided blades, alcohol, cotton wool, and gentian violet before surgery. Surgery should be performed within 1 to 2 days after the piglet is born. During the operation, the two men cooperated. The assistant grasped the hind legs of the piglets and separated them by approximately 60 degrees with the tail facing up. The surgeon held the tail in one hand and the scalpel in the other hand. The pigtail was cut at 1.5 cm from the base of the tail and the movement was faster. After truncation, quickly stop bleeding with a purple lotion on the wound. When performing surgery on the next pig, the scalpel must be disinfected again. The pigtails can heal after 2 days to 3 days. After the operation, attention should be paid to the disinfection of the wound and the heat preservation of the piglets, so as to prevent the piglets from being pressed or the sow to be pressed when the sows turn around. After the piglet is cured, it can be reared and managed like a normal piglet.
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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