-
How to Identify Adulterated Pig Feed? A Few Practical Methods to Teach You
(1) Observe with your eyes. Buy 1 magnifying glass, with a higher magnification. Sift the feed with a sieve, spread it into a thin 1 layer, and carefully observe the material on the sieve and below the sieve with the magnifying glass. The characteristics of some of these materials under the magnifying glass are as follows. 1. Fishmeal The main components of fishmeal are fish meat, fish bones, fish spines, fish scales, fish eyes, etc., and no other substances should be present. Under the magnifying glass are fish scales and fish eyes; the fish scales are covered with concentric circles, the fish bones from the head are flaky, the fish spines are tetrahedral, and the fish meat is composed of muscle fibers. 2. Blood meal The edges of the particles are sharp and reddish-brown; the black shell fragments are usually tightly curled, with a smooth surface and marks like needle pricks. Hard seed hilums can also be seen, oblong, yellow, brown, or black. 3. Rapeseed cake (meal) The rapeseed meal shell is brown or black, with a meat-like texture on the surface. 4. Cottonseed cake (meal) The cotton shell has two layers and does not separate; the outer layer is dark and the inner layer is light, and the outer shell is connected to the cotton lint; there are many fine hairs, appearing silvery under the lens. 5. @#@245@#@ Bran is mainly the outer skin of wheat; the bran flakes are flaky and contain many starch granules. 6. Bone meal is bone fragments, opaque, white, lusterless, with a rough surface and hard texture. 7. Shell meal is a white or gray powder, and some shells still have faint lines.
-
Precautions for Catching and Sorting during the Separate Rearing of Adult Eels
1. Catching adult eels for separate rearing There are two catching methods. In larger eel ponds, net catching is generally used; in smaller ponds or concrete-structured eel ponds, the pond water can be drained directly and the eels placed into an eel collection net cage. With the net catching method, feed is used to attract the eels to the feeding area, and when most of the eels have gathered in the feeding area, the feeding area is surrounded with a net and the net is lifted at the feeding area. The caught eels are gathered in a long eel collection box. The long box should be positioned on one side of the eel pond where sorting operations are convenient, and at a distance of 3 to
-
High-yield technique for bag cultivation of oyster mushroom on fermented coarse sawdust substrate
At present, with the development of the edible mushroom industry, the demand for raw materials is also growing. In recent years, the price of fine sawdust in the three northeastern provinces has soared, while coarse sawdust has become waste (such as the coarse sawdust sifted out through the electric sieve on the chipper and the coarse sawdust produced by the branch and twig crusher). The author used the locally abundant coarse sawdust as the main fermentation ingredient to cultivate oyster mushrooms, and the summary is as follows: 1 Test strain Oyster mushroom 2026, whose mother culture was provided by the Shijiazhuang High-tech Edible Mushroom Station in Hebei. The stock culture was a corn kernel medium, with corn kernels 99% and gypsum 1%. Soak or boil the corn kernels,
-
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
-
Key Technical Points for Improving the Survival Rate and Yield of Sexual Propagation of Gastrodia elata
Tuyan is one of the main Gastrodia elata production areas in Hubei, with wild Gastrodia elata widely distributed, and both the climate and soil within its boundaries are suitable for sexual propagation of Gastrodia elata. Combining local environmental conditions and based on practical experience, the author has summarized the key techniques for sexual propagation of Gastrodia elata suited to the local natural environment. 1. The quality and quantity of fungal inoculum are the foundation for ensuring the germination and growth of Gastrodia elata seeds. (1) The germination rate of Gastrodia elata seeds depends on the quality and quantity of the seed germination fungus. Practice has shown that sowing Gastrodia elata with No. 8104 seed germination fungus mixed in gives a high germination rate and fast germination speed.
-
Preliminary Report on the Results of Substrate Replacement Cultivation Trials of Gastrodia elata
Artificial cultivation of Gastrodia elata mainly uses the trunks of broadleaf trees such as oak, birch, hazel, elm, willow, jujube, pagoda tree, and wild cherry, and requires a diameter of more than 5 cm. For a long time, this has caused severe damage to forest resources, which are now on the verge of exhaustion. Therefore, research on substrate replacement cultivation techniques for Gastrodia elata has gradually become a hot topic. There are already precedents for substrate replacement cultivation using corn cobs, shrub stems, corn cobs, corn pith, branches, and straw, but no reports on the cultivation of Gastrodia elata with cottonseed hulls have been seen. For this reason, this trial was conducted, and the preliminary results are reported as follows: 1 Materials and
-
Key Integrated Cultivation Techniques for the Prevention and Control of Premature Senescence in Cotton
Cotton premature senescence refers to the phenomenon in which cotton leaves wither, turn yellow and drop prematurely under suitable climatic conditions. In the field, it appears as interveinal chlorosis and yellowing of the leaves after the full flowering stage. The yellowing leaves begin at the point farthest from the main stem and develop from top to bottom and from the outside inward, with the leaves gradually drying up and dropping. Premature senescence has a considerable impact on cotton yield and quality; the earlier it occurs, the greater the impact, and it can generally reduce yield by 10%-40%. Cotton premature senescence occurs because the fertilizer and water requirements for normal growth during the vigorous growth period cannot be met, leading to premature aging and early leaf drop.
-
How to prevent and control garlic heart rot? Occurrence patterns and integrated control techniques
In recent years, the garlic industry in Pizhou City has developed rapidly, with the planting area growing from 3,333 hectares in the 1970s to 33,000 hectares in 2004, making it the largest garlic production area in the country and a national standardized high-quality garlic production demonstration county (city). However, with the expansion of garlic cultivation area and the extension of continuous cropping years, various pests and diseases have become increasingly severe, especially the damage from garlic heart rot, which has worsened year by year and seriously affects garlic yield and quality. 1 Occurrence patterns and damage symptoms ① Occurrence patterns In late February 2002
-
How to treat garlic leaf blight? Master integrated control techniques in one article
Shandong is a major garlic-producing region, and garlic suffers fewer diseases than other vegetables. However, in recent years, a relatively rare new disease, garlic leaf blight, has appeared in garlic-growing areas, and it strikes fiercely and causes severe damage. Once this disease occurs, it can cause major yield reductions. I. Symptom identification This disease mainly affects leaves and leaf sheaths. Leaf infection falls into two types: first, the tip-blight type, which mainly occurs in the initial infection stage, with the leaf tip turning dark brown and forming many dark purplish-brown oblique parallel stripes on it; in severe cases the lesions extend to 1/3 to 4
-
What is the effect of adding plant ash to oyster mushroom substrate
When cultivating oyster mushrooms on raw substrate, adding an appropriate amount of plant ash to the substrate has certain benefits for the growth of oyster mushrooms. Because plant ash is alkaline, it has a disinfecting and sterilizing function and can inhibit the growth of various contaminating microorganisms. At the same time, plant ash contains various trace elements such as calcium, magnesium, iron and phosphorus, which can increase the nutrient content of the substrate. In addition, plant ash has the effect of absorbing heat and raising temperature, which can create a good growing environment for mycelial growth. The method of adding plant ash to the substrate is simple: just add 3%-4% after the substrate has fully absorbed water.
条件筛选