-
Rearing of Adult Snakehead Fish
The snakehead fish is a valuable freshwater fish of high economic value, known as the "treasure among fish." It is highly nutritious, containing large amounts of protein, more than that found in chicken and beef. From a nutritional standpoint, the snakehead fish is a comprehensive-nutrition, delicious-tasting premium health food. Rearing of adult snakehead fish refers to the production process of raising fingerlings to food-fish size in small water bodies such as ponds, pools and cages. Artificial cultivation of snakehead fish includes two methods: extensive polyculture and intensive monoculture. Extensive polyculture means culturing them together with the four major Chinese carps in fish ponds. Intensive monoculture
-
How Do Silkworms Spit Flat Silk? A Detailed Guide to Rearing Techniques
Flat silk can be directly processed into calligraphy and painting silk paper, silk pasted mount, silk floss quilts, and various handicrafts, and can fetch a better price than ordinary silk products. So how can silkworms be made to spit flat silk? The method is: during the silkworm rearing process, do not provide cocoon-spinning mounts; instead, place the silkworms on a flat surface, and they will naturally spit and accumulate silk into a flat shape; then after degumming, it is done. Below are several points to note for making silkworms spit flat silk: Preparation of the flat surface: before the silkworms mature, for each box of eggs prepare 35-40 sq m of flat surfaces such as reed curtains and bamboo curtains. And
-
What are the key points of mulberry leaf feeding techniques in young silkworm co-rearing?
In the process of young silkworm co-rearing, mastering feeding techniques and ensuring proper nutrition is the key to ensuring young silkworms develop robustly and uniformly. Carefully select mulberry leaves according to the leaf standards for each instar, selecting in the field and selecting on the tree. Choose non-toxic, pollution-free, insect-free, appropriately mature leaves from the upper new shoots. Before leaf preparation, perform a second careful selection, removing leaves that are too old, too tender, wilted, or secondarily contaminated and thus below standard. Planned preparation and storage of leaves for young silkworms During leaf preparation and storage, keeping mulberry leaves fresh and with sufficient moisture is very important. Low-temperature running-water leaf storage
-
-
Detailed Explanation of Key Technical Points and Management Methods for Fish Fry Rearing
After the summer fry are divided into ponds, the 1-year-old fingerlings reared until the end of the year to a size of 12-15 cm and a body weight of 30-40 g are called spring fingerlings. The growth cycle of black carp and grass carp is 3-4 years, and in some places the 1-year-old fingerlings are reared into 500 g 2-year-old fingerlings. 1. Fingerling ponds: To rear large-size fingerlings, it is recommended to build dedicated fingerling ponds with an area of 3-5 mu and a water depth of about 2 m. The preparatory work before the summer fry are stocked into the ponds is the same as for fry ponds. 2. Stocking: There are two methods, monoculture and polyculture. Polyculture is generally adopted. For ponds mainly stocked with common carp, common carp 6
-
Analysis of Why a Shorter Rearing Period Is Better for Growing-Finishing Pigs
Under good feeding and management conditions, lean-type pigs generally need 100 to 120 days to go from 20 kg to the market weight of 100 kg. In China's intensive and standardized pig farms, it generally takes about 110 days to go from 20 kg to 100 kg, and the age of pigs from birth to the market weight of 100 kg is 160 to 180 days, greatly shortening the finishing period. The benefits of this are as follows. 1. High daily gain and high feed efficiency. Lean-type pigs grow quickly. If a complete feed with comprehensive nutrition is provided, their productivity potential can be fully
-
Detailed Explanation of Key Techniques for Autumn Fish Fingerling Rearing
Autumn water temperature generally fluctuates between 20°C and 30°C, making it a good period for fish growth. It is especially the fattening season for smaller, weaker fingerlings, so farmers must effectively strengthen fingerling rearing. Disinfect and clear the pond. For old fish ponds converted to new ponds for fingerling rearing, after several months of rearing in spring and summer, water quality gradually deteriorates, dissolved oxygen and natural food organisms decrease, and pathogenic microorganisms increase, which can stunt fingerling growth. Grass carp fingerlings in particular are more prone to disease in such old ponds. At this time
-
Detailed Explanation of Summer-Fry Rearing Techniques for Jiang Yellow Catfish
1. Pond Conditions The pond area should preferably be 1-3 mu, with a water depth of 1.0-1.5 m, rectangular, oriented east-west. The bottom silt should not exceed 10 cm, the pond embankment should be firm and not leak, and its height should exceed the highest water level by 0.3-0.5 m. The pond bottom should be flat and sloped toward the drainage outlet, with ample water supply and convenient water intake and drainage. 2. Preparation Before Fry and Fingerling Stocking 20-30 days before fry stocking, drain the pond water and sun-dry the pond, remove weeds and debris from the pond, and clean up the bottom silt. About 15 days before stocking, add water
-
Rearing Methods and Technical Key Points for Male Silkworm Larvae
I. New Hybrid Male Silkworm Varieties (I) Variety Traits. The new autumn-rearing male silkworm variety bred by the Sericulture Research Institute of the Zhejiang Academy of Agricultural Sciences - Qiuhua x Ping 30, has the advantages of a strong constitution, uniform molting and rising at each instar, and being easy to rear. The number of ants per gram is around 2310, the 5th instar takes 6 days and 18 hours, the whole larval stage takes 22 and a half days, the two-day hatching rate is 49.34%, the silk length is around 1240 m, the cocoon shape is oval, large and uniform, the cocoon color is pure white, and the cocoon shell rate and silk yield are high. (II) Key Points of Rearing Technology. For ant reception and light exposure, this can appropriately be done earlier than for common varieties.
-
How to control the occurrence of silkworm diseases in silkworm rearing
Through practical investigation, we found that in the process of rearing silkworms, the insufficient awareness of silkworm farmers about the harm of silkworm diseases often leads to the occurrence of silkworm diseases, causing serious losses to production. Therefore, how to control the occurrence of silkworm diseases has always been the primary task in sericulture production. 1. Causes of silkworm diseases. Silkworm rearing is a high-density group rearing method, with a large number of individuals reared in a certain area. The silkworms' mulberry eating and excrement are also in the same area. Once disinfection work is neglected, or rearing management is improper, infectious silkworm diseases are prone to occur, causing spread and
条件筛选