Analysis of the problem of earthworm breeding in Europe
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The earthworm aquaculture in Europe is a new industry, but many raisers still have many problems in the cultivation methods and disease prevention and control, resulting in great economic losses. The author has spent several years in breeding earthworm production practices in earthen ponds. The problems encountered are summarized and suggestions are made as follows: 1. Selection and setting of earthen pond construction conditions The selection of earthen pond construction conditions, including water sources, water quality, pond area and water depth, soil quality, and surrounding environment, must all be suitable for life in Europe. And growing requirements. A 50-80 square meter shading net is to be built around the soil pool table, and each earthen pond should be equipped with at least 2 aerators. In the first three to four years of introduction of earthworms in the earthen pond, many raisers lacked experience in the selection of sites, the control of water sources and water quality, and various operations in the breeding process due to lack of understanding of life and growth habits in Europe. As a result, diseases often occur frequently, survival rates are low, some are completely destroyed, and economic losses are heavy. Earthquake farming in Europe requires not only better quality water, but also sufficient water and lower water temperature. When the water quality is poor, it is necessary to consider the construction of the necessary filter settings and sedimentation tanks. It is also possible to adopt some physical and chemical methods to improve the water quality. When the amount of water is insufficient, the circulating water system should be considered for filtration and sedimentation before breeding. Second, seed stocking density in stocking densities due to human factors, many cultivators blindly pursue production, stocking densities are too large, which will inevitably cause hypoxia and food utilization is low, while extending the growing period, increase production costs, Also susceptible to various diseases. Therefore, it is recommended that the breeding stockholders should have reasonable stocking densities. Excessively high prices and low prices are not conducive to the growth of cockroaches. Excessively high densities also show a markedly lower feed conversion rate and the results of the June test at higher water temperatures are more pronounced than the results of the May test with lower water temperatures. Third, feed problems and feeding times 1. At present, there are more manufacturers and brands of catfish feed in China. Almost all of China's powdered feeds are mixed and refined into pellets and bait pastes. The feed conversion rate is high, but Water pollution is more serious than pelleted feed. According to cost accounting, the use period of each stage can be adjusted appropriately. At present, we use European extruded puffed pellet feed. After the test comparison, the experts have concluded that the conversion rate of floating pellets is higher than that of local feed, the feed coefficient is lower by 16.4%, and the cost of raising 1 ton of feed for bait can save 2,930 yuan. And it has the characteristics of easy feeding, less loss, low cost, good digestion and absorption, less pollution, and rapid growth of carp. It is worth promoting. Experts also suggested that the Ministry of Agriculture should allocate special funds to carry out research on the use of redfish meal instead of white fishmeal and reduce the cost of additives, in order to reduce the cost of catfish feed by 10% in recent years. 2. Feeding is an extremely important technology in earthworm breeding in Europe. According to the stocking quantity, size, feeding conditions, weather, water temperature, water quality and other factors to determine the feeding amount, the feeding amount must be strictly recorded, according to the observed Feeding conditions, timely increase or decrease, the number of feeding points, in the afternoon twice, the daily feeding amount is generally controlled at about 70% -80% of the satiety satiety is more appropriate. If the quality of the dipping material is good, and the feeding technique is good, not only the feed loss will be small, but also the catfish will have good digestion and absorption after food intake, rapid weight gain, high feed conversion rate, rapid growth of carp, relative excretion, and reduction of water pollution. . It is recommended that the quail feeding industry must adhere to the "Four Sets," ie, fixed, regular, quantitative, and qualitative. Due to European gluttonous greed, we must not feed more. Overfeeding of squid will cause indigestion, but it will reduce the feed coefficient, but also cause a variety of diseases. IV. Disease prevention and management and daily management 1. It is recommended that the breeding industry can add garlic juice, multivitamins or other growth-promoting agents and Chinese herbal medicines to the early stage of the onset peak season of the year, ie early April and September. Enhances squid's constitution and promotes appetite. Normally, it is generally not advisable to apply drugs frequently on a regular basis so as not to affect the quality of the products. What is more important is to destroy the relatively stable water environment and thus affect the normal growth of the carp. 2. Through years of practical exploration and careful rearing, the earth-breeding culture in Europe has eliminated the need for timely injection of seedlings on the basis of enhanced feeding and water quality management and disease prevention to ensure that carp has sufficient nutritional requirements, a good water environment, and healthy growth. And timely harvest is also crucial.