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Trace elements needed for soybean growth and application methods
Normal soybean growth requires some trace elements, among which the more important ones are molybdenum, boron, zinc, manganese, etc. Molybdenum is a component of soybean root nodule nitrogenase and an indispensable component for the normal life activities of nitrogen-fixing bacteria. Boron is also very important in soybean life activities. Soybeans deficient in boron have poor root development and poor nodule formation, losing their nitrogen-fixing ability. Therefore, attention must also be paid to trace elements. Can the trace elements needed by soybeans be satisfied from the soil? This depends on the abundance or deficiency of trace elements in the soil and environmental conditions. For example, in low-lying or poorly drained
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Application method of simple temporary holding facilities for fish
At present, there are quite a few flow-through aquaculture farms in Sichuan, mainly culturing cold-water fish species, and most of their culture facilities use concrete ponds. During the earthquake, these concrete ponds were damaged to varying degrees by the destructive force of the earthquake, which may cause pond leakage and so on. If they are not repaired in time, the water in the ponds may be lost, creating a crisis for the survival of the cultured aquatic organisms, and even causing all the water in the ponds to run out, resulting in the death of the cultured aquatic organisms and bringing huge economic losses to the farmers. If
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Application of Anther Culture Technology in Rice Breeding
Using disease-resistant plants from the first backcross generation for anther culture can transfer disease-resistance genes into japonica rice in a short time, accelerating the process of disease-resistant breeding in japonica rice. Zhejiang Agricultural University began making crosses in 1975. An anther culture was carried out in 1976, and by 1977 stable varieties resistant to rice blast and bacterial leaf blight, such as Dan 209, had been developed. The whole process took only 3 years, and resistance genes for two diseases were transferred at the same time; its breeding speed and efficiency greatly exceeded the conventional research methods of Japanese scholars. This study also explored the approach of applying the anther culture method in seed production to produce foundation seed. Tests showed that pure lines from anther culture had a certain effect of purification and rejuvenation compared with foundation seed produced by the "three-plot method." Anther-cultured disease-resistant varieties have now been used as resistance sources for late japonica rice.
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Application Methods of Fertilizer Long in Formula Fertilization for Rice
1. Advantages of Fertilizer Long: (1) Long-acting and synergistic effect, extending the fertilizer efficiency period of nitrogen fertilizer by 1 time, with no fertilizer deficiency phenomenon throughout the entire growth period of rice. (2) Improved nitrogen fertilizer utilization rate; deep fertilization overcomes fertilizer loss due to running, overflowing and seepage of field water, reducing fertilizer loss. (3) Enhanced resistance of rice to low temperature, drought and disease erosion. (4) Changes traditional multiple surface fertilization to deep one-time fertilization, saving fertilization labor and costs. (5) Reduced nitrogen fertilizer dosage; according to plots with different fertility, the pure nutrient amount of nitrogen fertilizer can be reduced by 15%-25%. 2. Fertilizer Long
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Detailed Explanation of Melatonin Application in Fox Farming
Melatonin is an indole hormone secreted by the pineal gland in the brain of animals, also known as pineal gland hormone. It was first applied in fur farms in North America in 1985. In China, the technology for artificially synthesizing melatonin from domestic chemical raw materials and manufacturing melatonin implants was solved in early 1993. After 1998, melatonin became widely used in the fur farming industry in Northeast China. The Dongjin Fine Breed Livestock Farm in Xiangfan City, Hubei Province began using melatonin in 1999. During 8 years of practical application, melatonin has shown good results in inducing early fur maturation in foxes and delaying estrus in male silver black
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Application of Allicin as a Feed Additive
Allicin is the collective term for the main bioactive components in garlic. In China, allicin has a long history of use as a medicine. It is a broad-spectrum antibacterial agent with multiple biological functions such as anti-inflammatory, blood pressure-lowering, blood lipid-lowering, platelet aggregation-inhibiting, anti-cancer and anti-viral effects. Its use as a feed additive in livestock and aquaculture was developed through research and exploitation based on the development of rural farming, and it has promotional value. The author now introduces the application techniques as follows for readers' reference. (I) Functional effects of allicin. 1. Bactericidal action
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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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Large-scale leaf-rolling of the central leaves of rice may be related to excessive application of quinclorac
For some time recently, hundreds of readers across our province have called to report large-scale leaf-rolling of the central leaves of rice seedlings, which is even more common in direct-seeded rice production. Many readers brought in diseased plants. The root systems of the diseased plants are generally fairly normal, and there are no obvious disease spots or other symptoms on the leaves. After examining the submitted diseased plants, relevant experts from the Institute of Plant Protection of the Provincial Academy of Agricultural Sciences and other units preliminarily diagnosed that the leaf-rolling of the central leaves of rice is not caused by viruses or other pathogenic microorganisms, but may be phytotoxicity caused by herbicides such as 2,4-D and quinclorac, or may be caused by physiological
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The role and application method of spraying paclobutrazol on rice
Paclobutrazol is a highly active plant growth retardant and broad-spectrum fungicide. Its internationally used code is pp333, and the code for the product made in China is MET. Its physiological effects on rice are mainly dwarfing, promoting tillering and improving stress resistance. Moreover, after transplanting, the seedlings turn green quickly, tiller early, the number of effective panicles increases, and the seed-setting rate and 1000-grain weight increase. It is a simple, easy and effective measure to increase yield. Experiments in various places in Liaoning in recent years have found that rice seedlings sprayed with paclobutrazol show the following changes compared with the control: 1. The seedlings become shorter. Spraying at the rice seedling stage
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Discussion on the Application of Interferon in the Treatment of Canine Infectious Hepatitis
Canine infectious hepatitis is an acute septicemic infectious disease caused by adenovirus. It is characterized by central necrosis of hepatic lobules, intranuclear inclusion bodies in hepatic parenchymal cells and cortical cells, and prolonged bleeding time. Canine infectious hepatitis is seriously harmful to dogs and causes significant economic losses to the dog breeding industry. The virus has considerable resistance; under low-temperature conditions, it can survive in soil for a long time, remaining pathogenic after 10-14 d, and can also survive for a relatively long time in kennels. Sick dogs and recovered virus-carrying dogs are the source of infection for this disease, and their blood, secretions and excreta
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