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Detailed Explanation of Short-Term Storage and Fresh-Keeping Methods for Ginger
If the ginger is to be processed and used, short-term storage and fresh-keeping are needed. Choose a sheltered spot indoors, first spread a layer of moist sand on the ground, then arrange the stored ginger upright and closely packed on top, covering each layer with 5-6 cm of moist sand; in this way it can be stacked 0.8-1 m high, with the topmost layer covered with 10 cm of moist sand, then cover with plastic film to retain moisture. Note that water must not enter the ground, and the film may be left off for the first half month.
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Analysis of the Causes of Hypoxia in Farmed Fish and Countermeasures
Hypoxia refers to a state in which the internal tissues and cells of a fish cannot obtain sufficient oxygen to maintain their normal functions. To distinguish it from oxygen deficiency in the water, it may be called "biological hypoxia" or "tissue hypoxia." Asphyxia (difficulty breathing) is a phenomenon that occurs during biological hypoxia, and "floating head" (gasping at the surface) is the manifestation of the difficulty breathing or asphyxia commonly seen in aquaculture production. There are two situations in which fish experience hypoxic asphyxia: one is when dissolved oxygen in the water is insufficient and air pressure is too low, so that even if the fish's respiratory function is normal, the tissue cells in its body cannot obtain sufficient oxygen, resulting in "anoxic hypoxia"; the other
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What are the methods for determining a dog's age from its teeth
Age determination in dogs The age of a dog is mainly determined by a comprehensive assessment of the growth of the dog's teeth, the tooth cusps and the degree of tooth wear, shape, color, and so on. For ease of reference, the dog's dental stages are introduced as follows: adult dogs have a total of 42 teeth; puppies have a total of 28 teeth; around 20 days - teeth begin to erupt; 4-6 weeks of age - the deciduous incisors are fully grown. At nearly two months of age, all deciduous teeth are fully grown, white, thin and pointed. 2-4 months of age - replacement of the first deciduous incisor
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How should the row orientation for jujube tree planting be determined to be reasonable?
The row orientation for jujube tree planting not only directly affects the growth and development of the jujube trees themselves, but also affects the growth conditions of intercropped plants. Jujube trees planted in north-south rows have a greater amount of accumulated light under their canopy than those planted in east-west rows. At the same time, jujube trees planted in north-south rows show little difference in light exposure time between the north and south sides, while jujube trees planted in east-west rows show a large difference in light exposure time between the north and south sides. Different row orientations not only affect light exposure time, but also cause differences in the amount of light received. From the perspective of the planting needs of the jujube trees themselves, north-south row orientation is the best. In addition, jujube
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Detailed Explanation of the Key Technical Points for Long-Term Fresh Preservation and Storage of Jujubes
1. Technical characteristics. Applying this new technology can safely preserve fresh winter jujubes for 6 to 12 months, with a rotten fruit rate below 5%. After storage, the fruit does not change color or shape and has no off-flavor, and the sensory quality can reach 80% to 95% of that before storage. The preservation rate of the main nutrient vitamin C (VC) exceeds 80%, and the preservation rates of moisture and soluble solids content are not lower than 95%. From postharvest storage of the fruit to sale, no chemical substances or radiation are used to treat the fruit, and green fruit with high VC content can be supplied to consumers throughout the year.
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The Effects of Different Temperatures on Pigs and Countermeasures
I. Effects of ambient temperature on pigs. 1. Effects on pig health. In a continuously high-temperature environment, the resistance of pigs is significantly reduced, the body heat balance is disrupted, body temperature rises, coma occurs, heat stroke develops, and in severe cases death results. In a low-temperature environment, in order to conserve heat, pigs constrict their peripheral blood vessels, causing local frostbite. Low temperatures cause respiratory diseases and also often lead to rheumatism, arthritis and other diseases. Low temperatures have a greater impact on piglets; according to statistics, half of the dead piglets were frozen to death or died from cold-related diseases.
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How to determine if fish are suffering from pollution poisoning
Fish deaths can be caused by many factors such as disease, oxygen deficiency, toxic algae, mechanical injury, and pollution poisoning, and pollution poisoning is the most common type of fatal cause. Below are several methods for visually judging common types of pollution poisoning, for reference in production. Heavy metal pollution poisoning. Heavy metals refer to metals with relatively high density, such as lead, manganese, zinc, etc. The gills of poisoned fish appear grayish-white and secrete large amounts of mucus, forming flocculent deposits that block the gills and cause respiratory impairment; poisoned fish often float and swim at the water surface.
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Common problems and countermeasures during the black fry stage of Japanese eel
At the turn of spring and summer, Japanese eel farming in various regions is mostly in the black fry stage, and it is commonly reported that there are phenomena such as a decline in feeding rate and a tendency for gill rot and tail rot syndrome to occur, seriously affecting the healthy, sustainable, and steady development of Japanese eel farming. The main problems existing in the black fry stage of Japanese eel farming are now analyzed, and some corresponding countermeasures are proposed for reference. 1. Decline in feeding rate: In Japanese eel black fry farming, the phenomenon of a decline in feeding rate or difficulty in increasing the feeding amount occurs, and the main triggering factors are
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Method for Determining the Optimal Insemination Time for Sows by the Hand-Pressure Technique
The inseminator stands at one side of the sow in estrus, facing the sow's back, extends both hands flat, and gently places them on the sow's back, then gradually presses down with force. At this point, if the sow's back suddenly arches up and there is a sense of upward rebound, press down for another 1-2 minutes; if the sow stands still without moving, without continuous grunting or squealing, then this is the optimal time for insemination; if, when pressing down, the sow's limbs move forward and backward and she makes vocalizations, then it is not the optimal time for insemination.
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Common Problems and Countermeasures in Wheat Aphid Control
Problem 1: Controlling too late. Some farmers do not control according to the control threshold for wheat aphids, but instead control after the wheat aphids have covered the wheat ears. This not only harms the wheat, but also, because control is too late, affects the control effect. Countermeasure: The control threshold for wheat aphids is 500 aphids per 100 ears. Fields that reach the control threshold must be treated with pesticides immediately. Problem 2: Not updating the pesticide used. Not updating the pesticide used will cause wheat aphids to develop resistance to the pesticide used, and the control effect will be extremely poor. Countermeasure: In the early stage of aphid occurrence, per mu
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