-
Prevent Fish from Catching Cold When Stocking Fish in Autumn
Autumn is the golden season for stocking large numbers of silver carp, grass carp, black carp, bighead carp and other fish species into reservoirs. But many fish farmers have found that, often within 2 to 7 days after stocking, sick and dead fish are seen swimming on the reservoir surface. These sick fish lose their skin luster, their body surface mucus increases, and in severe cases they become paralyzed, rigid and die. The above symptoms are typical of a "cold," mainly caused by drastic changes in water temperature, in which the nerve endings in the fish skin are strongly stimulated and the internal organs' activities become disordered, with a mortality rate as high as 20% to 60%. Fish species are transported from the fish pond to
-
What should be noted when harvesting garlic scapes?
Generally, when the garlic scape emerges from the leaf sheath and begins to bend, it is the suitable time to harvest the garlic scape. Harvesting early or late has a great impact on the yield and quality of the garlic scape. If harvested too early, the yield is not high, it breaks easily, and its marketability is poor. If harvested too late, although the yield can be increased, it consumes too many nutrients and affects the growth and development of the garlic bulb, and the garlic scape tissue ages and its fiber increases; especially the base of the garlic scape ages and becomes inedible. Therefore, it is best to harvest garlic scapes at noon and in the afternoon on sunny days. At this time the plants are somewhat wilted, the leaf sheath and the garlic scape separate easily, and the leaves are tough and not easy to break, which can
-
What should be noted when processing dog skin
1. Remove all meat and greasy matter from the dog skin, lay it flat on a wooden board and rub it with coarse sandcloth or a brick until the roots of the coarse hairs are slightly visible. Take 250 g of tea-oil bran and add 2500 ml of water, bring to a boil and pour into a basin. After it cools, put in the dog skin and soak for 12 hours, then take it out and scrub it repeatedly with soap to remove the odor. 2. Take 500 g of alum and add 2500 ml of water, bring to a boil and pour into a basin. After it cools, fully immerse the dog skin, take it out after about 24 hours, place it hair-side down on a wooden board and stretch it tight,
-
What points should be noted when selecting a Cairn Terrier?
(1) First look at some materials introducing this breed of dog, to understand its appearance characteristics and basic traits, so as to have a clear target and avoid being cheated by inferior goods, causing financial loss. (2) Cairn Terriers are mostly purchased as pets, so special attention should be paid to the choice of coat color, with red, black-brown, gray or tawny being preferable. (3) The coat on all parts of the body should also meet the following requirements: the hair on the ears should preferably be dark brown, and the hair on the muzzle should preferably be
-
What to Do When Oyster Mushroom Mycelium Breaks or Degenerates? Causes and Prevention Methods
After inoculation, normally growing mycelium is dense and pure white, advancing forward in a fan shape, and the cottonseed hull substrate decomposed by the mycelium turns yellowish-brown. If a section of mycelium breaks and becomes disconnected, it is called "mycelium break." This situation is caused by excessive water content in the substrate and high temperatures during cultivation. Choosing appropriate humidity and temperature can prevent the "mycelium break" phenomenon. The degeneration and shrinkage of mycelium that has already grown well on the substrate is called "mycelium degeneration." If the substrate is too dry and too loose, the mycelium that grows will be thin and weak; excessively high temperatures during cultivation, poor ventilation, or pest infestation
-
What to Do When Oyster Mushrooms Grow Green Mold? Causes and Control Methods
Recently, Li Zhibao, an oyster mushroom grower from Zhumiao Village, Nancheng Town, Xiajin County, Shandong Province, called for advice: This year the oyster mushroom market is good, with a wholesale price of 1.5 yuan/jin, so he invested 20,000 jin of substrate at once to cultivate oyster mushrooms, but now some green things have grown on the oyster mushroom cultivation bags. Experienced people say it is green mold, and he does not know what to do. The author's reply is as follows: Green mold is a major disease in edible mushroom cultivation, mainly occurring on mushroom blocks that have not yet been colonized or on culture substrate that has not been thoroughly sterilized. Green mold is prone to breeding in acidic and relatively humid environments. Its spores spread through the air
-
What should be noted when mixing chicken daily rations?
There are many kinds of chicken feed; which feed should be the main one? How can it be mixed scientifically and rationally while also being low in price? 1. First, you must understand what nutrients the chickens you raise need. Because the requirements of various chickens differ, such as light-layer chickens, heavy-layer chickens, or meat chickens, chicks, older chickens, or breeding chickens, the nutrients needed by various chickens are not completely the same in quantity and quality. Chicken farmers should consult the corresponding materials according to chicken breed and size to determine the required nutrients. 2. You need to know which type of feed produced locally is more abundant and lower in price
-
What to do when the golden coin turtle (Cuora trifasciata) contracts bacterial intestinal hemorrhagic disease
Bacterial intestinal hemorrhagic disease in the golden coin turtle is an intestinal disease caused by opportunistic pathogenic bacteria. It is usually triggered by unclean or contaminated water, or by eating spoiled and rotten leftover bait. In March 1997, golden coin turtles at an aquaculture farm in Mule Town developed cases characterized by reduced feeding, refusal to eat, listlessness, bleeding from the mouth and nose, and not even fleeing when grasped by hand; clinical and necropsy examination led to a diagnosis of bacterial intestinal hemorrhagic disease. The details are as follows: 1. Incidence situation The aquaculture farm kept 57 golden coin turtles, each with a body
-
What to Do When Oyster Mushrooms Do Not Fruit? Cause Analysis and Control Measures
In oyster mushroom cultivation, it is common to see no fruiting or abnormal fruiting after spawning, which leads to production failure and reduced production efficiency. For this reason, after many years of production and research, we have summarized the causes of no fruiting or abnormal fruiting and the solutions. 1. Sterile spawn The fruiting bodies of oyster mushrooms are formed by dikaryotic mycelium. If the spawn used in production is unpaired monokaryotic spores or the mycelium grown from them, it will result in no fruiting or low yield. Therefore, before production, a fruiting test of the spawn should be carried out to avoid abnormal fruiting and cause
-
What to Do When Bumps Appear on Oyster Mushroom Caps? Detailed Prevention and Control Methods
This condition generally occurs in winter. The upper part of the mushroom cap, especially the edge, becomes covered with bumps of varying sizes. In severe cases, the entire cap is covered with bumps. Once bumps form, the fruiting bodies grow extremely slowly. This disease affects both the commercial quality and the yield. The main causes of bump formation are: (1) Fires are lit inside the cultivation room to raise the temperature, causing carbon dioxide to accumulate. (2) The cultivation bags are placed near air vents, and stimulation by cold drafts causes disordered cell growth inside and outside the oyster mushroom cap, resulting in bumps. Prevention and control methods: Strengthen ventilation and air exchange, and harvest all oyster mushrooms with bumps.
条件筛选