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Fish stocking should be arranged reasonably according to water body conditions.
During a "science and technology to the countryside" activity, the author learned that many fish farmers have had unsatisfactory yields and profits over the years in pond fish farming. The main reasons are that the fish stocked were not reasonably matched according to the feeding habits and behaviors of the fish, the varieties stocked were single, the quantities were too high or too low, and the sizes were small. This situation exists to some extent all over the country. The end of the year and the beginning of the year is the season when large quantities of fish are stocked in various places. In order to make full use of the water body, stock fish reasonably, and increase the yield per unit area of the water body, the key points for reasonably stocking fish according to local water conditions are as follows.
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What are the reasons for the low survival rate of sexual reproduction in Gastrodia elata?
Gastrodia elata is a precious Chinese medicinal herb in China, and its cultivation area has been expanding year by year. Due to the degeneration of varieties in asexual reproduction, yields are low and unstable, and quality declines, which has affected commodity exports. At present, most growers use sexual crossbreeding to propagate seed tubers to solve the problem of yield reduction caused by variety degeneration in Gastrodia elata. However, there are also problems such as lack of proficiency in the technology and uneven quality of breeding, which have restricted the rapid development of Gastrodia elata, leading to the abnormal phenomenon that the more it is developed, the fewer the products and the higher the market price. Those who fail gain very little from the huge investment they made, which has greatly dampened farmers' enthusiasm for development. In response to the above
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Reasonable Application Methods of Allicin Feed Additives
Allicin has the effect of improving the growth environment of livestock and poultry. The volatile sulfur-containing compounds in allicin can not only give off a special garlic odor to drive away mosquitoes, flies and insects from biting and sucking feed or manure, but also, under the action of enzymes in the bodies of livestock and poultry, be converted into allicin and excreted from the body to prevent mosquitoes and flies from breeding and growing in manure and urine, thereby improving the surrounding environment. Allicin has an anti-disease effect on livestock and poultry. Allicin can effectively kill various pathogenic bacteria such as Shigella dysenteriae, Pasteurella, Salmonella enteritidis, and Pseudomonas aeruginosa, and has the functions of enhancing resistance to viral diseases, and replacing
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Key points of tea cultivation: selecting improved varieties and reasonable close planting
1. Selecting improved varieties Seeds (seedlings) are the basic means of production in tea cultivation, and any cultivation method is built on the improved varieties of a given period. Since the 1980s, tea cultivation has entirely adopted the close-planted, dwarfed, no-tillage method. Because individual space is reduced and population density increased, it is all the more necessary to match this with suitable improved varieties in order to achieve the desired results. For example, Fuding Dabaicha, Qianmei 101, Qianmei 303 and others are all fine tea varieties suitable for close planting. 2. Collection and
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Why are oyster mushrooms growing poorly? The reasons are here
Some oyster mushroom growers wrote in saying that the oyster mushrooms they cultivated were not growing as well as they had hoped, and they wanted to know where exactly the problem lies. Below is an analysis and a few reminders regarding some problems commonly seen in cultivation: The first reason may be that the ambient temperature and the substrate temperature are unsuitable. Being above or below the fruiting temperature range of the cultivated variety will both lead to the phenomenon of no fruiting, or of no normal fruiting after the first flush has been harvested and the crop turns to the next flush. The second reason is poor ventilation in the mushroom shed. Poor oxygen supply and excessively high carbon dioxide concentration are both unfavorable to fruiting; when oxygen is severely lacking, large numbers of mushroom
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Reasons for Slow Mycelial Growth in Oyster Mushrooms and Solutions
During the cultivation and management process, it is necessary to understand the biological characteristics of different varieties and the requirements of the mycelium during its growth and development stages for nutrients, moisture, temperature, light, pH, and other environmental factors. After inoculation (at a 10%-15% inoculation rate), mycelium extending outward from the spawn block can be observed in the culture room within 2-3 days, growing 3-5 cm in 7-10 days, fully colonizing the bag in 20-30 days, and producing mushrooms in 35-45 days. If these standards are not met, the reasons are: (1) The raw materials have been stored for too long and are highly acidic,
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What are the reasons why oyster mushrooms do not fruit or fruit abnormally?
During oyster mushroom cultivation, it is fairly common for a fully colonized, mature mushroom bed to delay fruiting, or for a bed that has already produced 1 to 2 flushes to stop fruiting normally. The reasons include the following: 1. Substrate temperature too high. In a mushroom bed with mature mycelium, if there is no influence of lower temperatures, the substrate temperature drops very slowly. If the substrate temperature is above the fruiting temperature range, primordia are not easily formed; this phenomenon is most common in low-temperature strains planted in autumn. 2. Unsuitable environment. The ambient temperature where the mushroom bed is located is higher than the fruiting temperature range of the planted strain,
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What are the reasons why oyster mushroom yields are getting lower and lower
Recently, many growers have called to ask: why are oyster mushroom yields getting lower and lower these days? Compared with previous years, the difference is far too great. For this reason, the author conducted a survey and found the following problems: Serious pollution of the cultivation environment. The vast majority of growers cultivate in greenhouses year after year. Deteriorating environmental conditions and incomplete disinfection are the main reasons for reduced oyster mushroom yields. According to tests, the background count of contaminating microorganisms in a new site was 63.95 per square meter, with bacteria accounting for 95%, and 150 colonies per square meter. After the first cultivation cycle ended, the background count of contaminating microorganisms was 20 times higher than before. These contaminating microorganisms control the growth of oyster mushrooms to some extent, and the more cultivation cycles there are, the lower the oyster mushroom yield.
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Reasonable pig feed formulation is the only way to prevent pigs from losing their appetite
When the temperature rises above 35°C, pigs have low feed utilization and slow weight gain. Therefore, in hot seasons, different feeding methods should be given according to different categories of pigs and different physiological stages of pigs. Boars: feed 2 times a day, and add green feed or thin feed at noon. Mating and exercise are both carried out in the morning and evening; after mating, do not immediately let them go into water to wallow or spray them with cold water. From 1 p.m. to 3 p.m. every day, spray water once on the pigs' bodies and the ground, and reduce light to 8-10 hours. If the number of matings is low, the amount of concentrated feed should be reduced to prevent overfattening and poor libido.
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5 contraindications for immune injection in domestic rabbits; only reasonable immunization brings healthy rabbits
Reasonable immunization brings healthy rabbits: 5 contraindications for immune injection
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