Boar selection and management

Wild Boar Estrus and Breeding Wild boars are typically lean and coarse, with a gray or gray-yellow coat. Adult sows weigh between 90 to 130 kilograms and are highly sensitive to environmental changes. Female wild boars usually have 6 to 7 pairs of teats, and they give birth about 2.5 times a year, with each litter containing 10 to 15 piglets. The ideal breeding period for wild boars is between 5 to 6 months after birth, when their weight ranges from 40 to 60 kg. When a sow is in estrus, breeders often use the strategy of pairing early-born sows with early parity and late-born sows with later parity. During estrus, the external genitalia of the female become noticeably red and swollen. The best time for breeding is when the genitalia change from bright red to dark purple, and the swelling decreases slightly, or when the sow stands still when touched on the rump. Male and female wild boars take longer to mate compared to domestic pigs. Based on experience, it's recommended to use a repeated mating method, where breeding occurs every 6 to 8 hours. This approach significantly improves the conception rate. When a female is in heat, the male can be introduced to her for one to two days. During this time, the male may mate several times at night. After confirming successful mating, the male is removed. A check is performed after 20 days to see if the sow shows signs of estrus again. If no estrus is observed, it indicates successful mating. The estrous cycle of a wild sow typically lasts 18 days. Pig Selection Farmers engaged in wild boar breeding should maintain 1 to 2 purebred wild boars. As the saying goes: “Good sows make good litters, and good boars make good offspring.” This highlights the importance of selecting quality boars. Choosing a high-quality wild boar is crucial for the future of the herd. Typically, purebred wild boars that exhibit typical wild traits—such as body length, leg height, and snout shape—are selected for breeding. Offspring from crosses between wild boars and domestic pigs often show a tendency to revert to ancestral traits, appearing more like domestic pigs than wild boars. Therefore, hybrid boars are not suitable for breeding purposes. If purebred wild boars are unavailable due to limited resources, farmers can opt for ternary hybrids with over 70% wild boar genetics. It’s also essential to avoid inbreeding among relatives to ensure strong immunity and fast growth in the offspring. Feeding Practices Wild boars are naturally omnivorous, primarily feeding on leaves and weeds. This dietary preference is maintained under captive conditions. Green feed such as grasses and vegetables should make up 60% to 70% of their diet. Some farmers mistakenly use full-feeding methods similar to those used for domestic pigs, which increases costs and leads to issues like poor growth and excessive nutrient intake. Overfeeding can cause problems such as difficulty in mating or even failure to breed. To prevent this, feeding should be controlled, with green feed as the main component, and exercise should be increased. Boars suffering from nutritional deficiencies require more crude protein and vitamins. Inadequate diets can weaken their constitution and reduce semen quality, leading to low sperm count, thin semen, incomplete development, and reduced fertility. Deficiencies in minerals like calcium, manganese, zinc, and selenium can also lead to gonadal degeneration and low libido. Therefore, a balanced diet is essential. High-protein feeds such as fish meal, bone meal, soybean meal, shrimp, and silkworms should be provided year-round. Additionally, vitamin-rich, juicy green feeds should be included. In northern winters, when fresh greens are scarce, vitamin supplements can be added. For mineral deficiencies, feeding calcium-rich green feeds and hay powder, along with phosphorus-rich bran and appropriate amounts of bone meal, limestone, or shell powder, can help maintain health and reproductive performance.

Manual Video Measuring Machine

Manual vision measuring machine is a precision measurement instrument that uses manual driving for 3 axes, and the measurement software is manual point taking.

This instrument uses a zoom objective to magnify the measured object, and the image is input into a computer through a CCD industrial camera device. The enlarged image of the measured object is transmitted to the measurement software for non-contact and efficient geometric measurement of various complex workpieces.

Suitable for non-contact measurement of stamped parts, plastic parts, thin film shaped, easily deformed, easily damaged, and small-sized workpieces, such as workpiece measurement in industries such as rubber, plastic, small hardware, clocks, and light industry.Video Device

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The vision measuring machine consists of three parts: an image acquisition device, a data acquisition device, and a two-dimensional measurement software. The zoom objective lens and high-resolution color camera form an image acquisition device, and the data acquisition device is composed of a grating ruler and a data processor. The image and data are measured using 2D measurement software to achieve point, line, arc, and distance measurements.

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