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What nutrients are essential for soybean growth and development?
Soybeans require large amounts of nutrients in many different forms. For the same yield, soybeans need 4-5 times more nitrogen than cereal crops. The main nutrients they require are the three major elements nitrogen, phosphorus and potassium, followed by 9 trace elements including calcium, magnesium, sulfur, magnesium, boron, molybdenum, manganese, zinc and copper.
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Analysis of the problems existing in the development of the eel industry and the countermeasures and suggestions
I. Seedlings and fingerlings The main species farmed for eel in China are the Japanese eel (Anguilla japonica) and the European eel (Anguilla anguilla). The resources of both the European eel... have already approached exhaustion, with annual production falling from 3,000 tons 30 years ago to 100-200 tons. From June 3 to 15, 2007, at the Conference of the Parties to the "Washington Convention" (CITES) held in the Netherlands, the European eel was listed in Appendix II of the Convention on Endangered Species of Wild Fauna and Flora, and this will be formally implemented starting in January 2009: China imports about 60 tons, or about 150 million individuals, of European eel seedlings and fingerlings annually, and farmed European eel accounts for more than 1/3 of eel production, while European eel accounts for about 40% of exported roasted eel. Japanese eel resources have also severely declined. In recent years, the seedling and fingerling resources of Japanese eel in Asia have remained at about 100 tons, and the annual catch in recent years has remained at 80-100 tons. In 2008, the output of European eel seedlings and fingerlings was about 90 tons, half of a normal year. The output of Japanese eel seedlings and fingerlings was about 35 tons, one third of a normal year. The severe shortage of seedling and fingerling resources has led to soaring prices. Moreover, artificial breeding of eel seedlings and fingerlings will not be able to form production capacity in the near future.
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Degradable-film controlled-release fertilizer for rice successfully developed in Hunan Province
The Soil and Fertilizer Institute of Hunan Province has developed a degradable-film controlled-release fertilizer for rice that can be widely applied in rice-growing regions of China with no side effects. Using natural and semi-natural polymer materials as the main coating components and adopting a self-developed new fluidized dual-spray-bed coating process, the Soil and Fertilizer Institute of Hunan Province developed a degradable-film controlled-release fertilizer whose nutrient release can be artificially controlled within 30 to 330 days. This controlled-release fertilizer is non-toxic, completely degrades within 2 years after being applied to the soil with no residue, and can reduce fertilizer pollution of the atmosphere, soil, water bodies and other environments.
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The development prospects for Butterfly Bush are extremely broad
Butterfly Bush is the most popular landscaping tree species in Europe and America, and is highly suitable for promotion in North China, Central China, East China, and parts of Northeast and Northwest China. In terms of landscaping effects, this tree species has many advantages. It is a perennial, fast-growing, semi-evergreen shrub with grayish-green leaves that are large and opposite, about 25 cm long. From summer to late autumn, it continuously blooms with lush panicles, the inflorescences about 40 cm long, in diverse colors including purple, blue, pink, white, and yellow. The flowering period lasts up to 6 months, which can compensate for the scarcity of blooming plants in summer. The flowers have a strong fragrance, attracting many
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What are the prospects for developing and utilising the resources of silvervine actinidia?
China is rich in kiwifruit resources and has a long history of cultivation, but these are mainly concentrated in the south. The kiwifruit species produced in Northeast China are mainly three: silvervine actinidia (Actinidia polygama Planch), hardy kiwifruit (A. arguta Planch) and kolomikta vine (A. kolomikta Maxim). Judging from the current propagation, cultivation and utilisation of Northeast China kiwifruit, relevant research is lacking; hardy kiwifruit and kolomikta vine have been introduced and planted sporadically in China, with no successful experience yet
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What Are the Prospects for Gastrodia? Market Conditions and Development Potential Analysis
Question: What are the development prospects for Gastrodia? Answer: This is a question most enquirers care about. Simply put, Gastrodia, as a precious Chinese medicinal herb, has gone from wild harvesting to artificial cultivation, and from a yield of only 3 kg per unit area to more than 20 kg today; overall output has increased several hundredfold, yet the market remains tight. This shows at least three things: First, Gastrodia has moved from purely medicinal use into the ranks of health products, and the development and application market for health products is huge with unlimited potential. The hot sales of Gastrodia tea and Gastrodia drinks have opened up deep-processing channels for Gastrodia and absorbed
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Analysis of the Current State of Snakehead Farming and Interpretation of Its Future Development Prospects
People customarily refer to fish of the family Channidae collectively as snakehead, blackfish, caiyu, shengyu, and so on. The snakehead (Channa argus) is the most widely distributed and highest-yielding species among the Channidae. As market demand grows, the snakehead may become one of the most promising aquaculture species in China in the early 21st century. China has a total of 7 species of Channidae, namely the snakehead (Channa argus), the spotted snakehead (Channa maculata), the dwarf snakehead (Channa asiatica), the broad-headed snakehead (Channa gachua), the striated snakehead (Channa striata), the slender snakehead (Channa limbata) and the elongated snakehead (Channa elongata). Among them, only the snakehead is a widespread species, distributed across all the major river systems of the country and also the highest in yield, while the spotted snakehead, the dwarf snakehead and the broad-headed snakehead are distributed only in South
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Why does the golden boxwood develop yellow leaves?
Golden boxwood Buxus sempervirens 'Latifolia Maculata' belongs to the Buxaceae family, Buxus genus. It is an evergreen shrub, 30-40 cm tall, with a compact form; the new leaves are bright yellow, and when mature they turn dark green with yellow spots, glossy. It is cold-resistant and shade-tolerant, suitable for loose and fertile soil, and can also grow in alkaline soil. It has low water requirements and only needs to keep the soil half-moist. It is relatively resistant to toxic gases such as sulfur dioxide, chlorine, hydrogen sulfide, and hydrogen fluoride. This species is a cultivated species, and in
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How can wild tangli resources be developed and utilized? See the approach in Simao, Yunnan
Tangli is a local name in Simao, Yunnan. It includes several species and also has several folk names, such as tangli thorn, mountain pear, boshali, sour pear, etc. Tangli belongs to the genus Pyrus in the Rosaceae family and is a wild fruit with great development and utilization value. Tangli is distributed across all prefectures and prefectures of Yunnan, growing in mountain forests and wildlands. In some places it naturally forms forests or patches, with abundant reserves. At present, tangli trees in Yunnan are used as rootstock for cultivated pears, the flowers are eaten as a wild vegetable, and the fruit can ripen on the tree. Local people gather it and eat it fresh: in winter there are
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Super-healthy watercress developed through genetic technology
Watercress was originally just an ordinary vegetable in the housewife's shopping basket. British scientists used transgenic technology to make watercress rich in the polyunsaturated fatty acids found in chicken and fish, turning it into a "super-healthy" vegetable. The Omega-3 and Omega-6 polyunsaturated fatty acids contained in this transgenic watercress can regulate blood pressure and immune responses and participate in cell signaling activities. Omega-3 is also believed to promote brain development and reduce the incidence of heart disease and rheumatoid arthritis in adults. Seaweed and mushrooms are rich in natural polyunsaturated fatty acids. British Bristol
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