Sea cucumbers are high-end foods that are highly recommended by the general public. Unscrupulous traders are pursuing huge profits. When they dry processed, they use unscrupulous methods. Lighter ones are filled with sand and salt, and the salt increases their weight. Even more, chemical methods are used to set fresh ginseng drugs. Drying sale, a variety of media have been disclosed. Choosing dried sea cucumber products should be clearly observed. Good quality sea cucumbers are large in size, well-distributed and well-distributed, with sufficient dryness (water content below 22%), large amount of water, complete body, meat hypertrophy, complete spurs without defects, open and correct, no coliforms and silt, and there are Fresh luster; sub-quality sea cucumber uniform head, dry feet (water content below 22%), Shen meat is a little thin, there are individual skin phenomenon, a little damage to the puncture; urinary bladder and sediment remain less.
Poor sea cucumbers are not as tidy as they are. Therefore, the selection of sea cucumbers should be full body fat, a large body weight, meat sturdy upright stout, no marks on the surface, the knife turned outwards as well, but also at the knife mouth thick meat. This explains the freshness and quality of sea cucumbers. Incomplete sea cucumbers are often left by traders to remove corruption. In addition, the body shape of the dried sea cucumber shows that the fresh sea cucumber has not been treated in time and there is a situation of water. Such sea cucumbers are prone to disease and are degraded by microbial contamination. Some traders are stuffed with salty salt or alum in a fresh cucumber belly, and some are also mixed with sand, iron, and other miscellaneous things. Then they are immersed in a boiling pot and boiled. Remove the miscellaneous goods, mix with salt, dry ash or dry. This kind of poor quality sea cucumber is often very thin skin, individuals grow up and drum round, white skin, Sensation Sensitive to soft hair; sea cucumber with alum processing, is dark gray, there is no sense of light, feel Shenhen brittle.
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.
Irrigation System
Degree Irrigation Nozzle,Irrigation for Agriculture,Impact Drive Sprinkler,Plastic Drip Irrigation Fittings
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