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Chinese-American biologist successfully breeds double-gene transfer cloned pig
The University of Connecticut in the United States announced recently that renowned Chinese-American biologist Yang Xiangzhong, in cooperation with the scientific research department of Taiwan, China, has bred the world's first double-gene transfer cloned pig carrying human coagulation factor IX and porcine lactoferrin. This research achievement is expected to be used to treat hemophilia. According to Yang Xiangzhong, a professor at the University of Connecticut, this research was conducted under extreme secrecy by his research team in cooperation with the Taiwan Animal Technology Research Institute. The first cloned pig was born on February 15 this year at the Taiwan Animal Research Institute
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How Should Potatoes Be Stored? A Full Analysis of Scientific Preservation Techniques
How to scientifically store fresh potatoes for seed, food and processing use is a key link in extending the potato industry chain. Through scientific storage, market supply and demand can be regulated and value can be increased by 20% to 30%. Through in-depth investigation and research and production practice, the author discusses the current potato storage situation in Weichang County, the existing problems and scientific storage methods. 1. Current potato storage situation in Weichang Although farmers in Weichang have the habit of storing potatoes and have accumulated rich storage experience, there are also many
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What types of silkworm diseases are there? A full analysis of common types
Silkworm diseases can be divided into two categories: one is infectious diseases, and the other is non-infectious diseases. Any disease caused by pathogenic microorganisms such as viruses, bacteria, and fungi invading the silkworm body and then multiplying is an infectious disease. It can be transmitted from diseased silkworms to healthy silkworms and is an important factor affecting sericulture production. Any disease of silkworms caused by attacks by arthropods (fly maggots, lice mites), pesticide poisoning, and mechanical trauma is called a non-infectious disease. It cannot cause healthy silkworms to become ill through silkworms as a medium, and it is also an important factor affecting sericulture production.
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What Types of Physiological Deformities Occur in Mushrooms? A Full Analysis of Common Types
Mushroom deformities are mostly triggered by temperature differences or unfavorable environmental conditions; they may also be related to the strain used. The common deformed mushrooms mainly include the following types: 1. Hollow stipe. From the outside the mushroom looks normal, but when the base is cut off, part of the stipe is found to be hollow, usually with a ring-shaped cavity around a hard core. Afterwards, the cut surface of the stipe may split and curl backward, making the mushroom poor in appearance and reducing its marketability. Cause: This is mainly caused by low air humidity during the fruiting period, rapid evaporation of water from the mushroom body, and overly dry casing soil,
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Full Analysis of the Key Cultivation Techniques for Schisandra chinensis
Schisandra chinensis, also known as northern schisandra. It is a perennial deciduous woody vine of the family Magnoliaceae. It is mainly produced in the three provinces of Jilin, Liaoning and Heilongjiang. The quality of the product from Jilin and Liaoning is the best, and it has long been known as "Liao Wu Wei". The ripe fruit is used as medicine. 1. Propagation methods. Wild Schisandra chinensis, apart from seed propagation, mainly reproduces by underground creeping stems. In artificial cultivation, cuttings, layering and seed propagation are mostly used, but rooting is difficult, and the conditions required for treatment are not easy to control, so none are as good as seed propagation. The seed propagation method is simple and easy to carry out, and can
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What to Do About Soybean Flower and Pod Drop? A Full Guide to Prevention and Control Measures
Soybean flower and pod drop is a major factor affecting yield. Under ordinary cultivation conditions, the number of dropped flowers and pods can account for more than 50% of the total number of flowers, and in severe cases up to 70%. Soybean flower and pod drop is mainly caused by internal physiological imbalance in the plant and adverse external environmental conditions. Based on practical experience in our area, the following measures can be taken to prevent soybean flower and pod drop: 1. Apply more phosphorus and potassium fertilizer, and appropriately top-dress with nitrogen fertilizer and micronutrient fertilizer. Applying more phosphorus and potassium fertilizer to soybeans can reduce flower and pod drop and promote full grains. Therefore, on the basis of applying sufficient base fertilizer, at sowing time for every 66
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Full Analysis of the Key Technical Points for Lotus-Rice-Fish Integrated Farming
"Lotus-rice-fish" integrated farming refers to a co-culture model in which both rice is planted and fish are raised during the growing period of lotus root. The relevant integrated farming techniques are briefly introduced below. 1. Reasonable site selection. Choose gray mud fields with sufficient water sources, strong water retention capacity, and medium or above fertility. Fields with water-quality concerns, cold-waterlogged fields, and perennial lotus fields are not suitable for selection. 2. Select improved varieties. For lotus seeds, choose excellent varieties with large grains, a long flowering period, and high yield; for rice, it is advisable to choose early-maturing or early-to-medium-maturing varieties, such as Minke Zao No. 8, Zhefu 218, etc.; for fish, mainly stock common carp.
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Potato Harvester Successfully Developed, Mechanized Harvesting Realized
On July 17, at the provincial potato mechanized planting and harvesting on-site demonstration meeting held in Xiazhaizhai Village, Nianbo Town, Ledu County, Qinghai Province, it was observed that a single-operator potato harvester produced and developed by a provincial private enterprise completed the potato harvest of a 8-fen plot in less than 40 minutes, equivalent to a whole day's workload of 10 laborers, while the machine's selling price was less than 1500 yuan. The staff of the Qinghai Provincial Agricultural and Animal Husbandry Machinery Extension Station distributed and promoted 40 such potato harvesters with an operating efficiency of 1.2 mu per hour to 20 grassroots stations on site.
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What are the latest rice breeding technologies? A full analysis of the world's cutting-edge methods
Research on salt-tolerant rice breeding The aims of this research are: 1. To enable new salt-tolerant rice to adapt to cultivation in saline-alkali land. 2. To make full use of seawater irrigation when freshwater is scarce. Abroad, there have been reports of salt-tolerant crops such as tomato, melon and barley. Salt-tolerant rice bred by the University of Sussex in the UK can grow vigorously in the field, but the complexity of regulating salt content in the field must be recognized. Research on genetic engineering of salt-tolerant rice is quite active in the UK. Researchers insert genes from salt-tolerant rice into rice,
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What Is the Dog Birth Process Like? A Detailed Guide to the Full Whelping Process in Female Dogs
Dogs are polytocous animals, and because breeds differ, the number of puppies per litter also varies. Generally, small breeds have 1-4 puppies per litter, at most 6. Medium and large breeds usually have 6-9, at fewest 1-2, at most 12-13, and the recorded maximum is 25. Whelping in dogs occurs through contractions of the uterus and the abdominal wall muscles and diaphragm, which push out the fetuses and their associated tissues. The contractions of the uterus come in waves, with intervals, so uterine contractions are usually called "labor pains." The contractions of the abdominal wall muscles and diaphragm are called "straining." Stra
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