-
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.
-
Detailed Explanation of the Processing Technology of Charcoal-Grilled Octopus
Octopus belongs to the phylum Mollusca, class Cephalopoda, and has 8 arms; it is also known as "eight-clawed fish" or "qiao". There is Octopus vulgaris, commonly known as true octopus; Octopus ocellatus, commonly known as rock octopus; and long-arm octopus, commonly known as wangchao. Octopus inhabits the seabed, crawling or swimming with its arms, and feeds on benthic small fish, shrimp, crabs and shellfish. It is distributed along the coastal areas of China. Octopus meat is thick and plump and is an excellent seafood product; it is not only rich in nutrients, delicious in taste and unique in texture, but also has high medical value. It is deeply welcomed by Chinese and foreign consumers and has always been sold as a high-grade aquatic product. However,
-
Detailed Explanation of Soybean Cultivation Technology with Film Mulching Between Rows on Wide Ridges
Heilongjiang Province is China's main soybean production area, with its planting area accounting for 7% of the national total and its current total output accounting for 11% of the national total. In the course of soybean production development, the Heilongjiang Reclamation Area has vigorously promoted scientific and technological innovation, resulting in a relatively large increase in soybean yield per unit area and total output. From 2001 to 2005, the average yield per hectare reached 2531.7 kg; in 2005, the average soybean yield per mu reached 178 kg, reaching or approaching the soybean yields of advanced countries worldwide. Soybean cultivation technology with film mulching between rows on wide ridges
-
Scientific use of chemical control technology in cotton can effectively increase yield
Scientific chemical control of cotton is an important scientific measure for increasing cotton yield. Chemical regulation technology has three benefits: first, it helps strong seedlings to develop early, controls height and stabilizes growth, making it easier to give play to the yield-increasing advantage; second, it simplifies cotton field management, saving labor and cost; third, it promotes the transformation of second- and third-grade cotton seedlings, achieving balanced development and increasing yield and efficiency. The principle of chemical control is "small amounts, many times; light control, frequent adjustment." One should master "spray every time, control every time" or "control once at every interval" (flexibly according to soil fertility, rainfall, and growth condition), and it is best to "divide the amount for one application into three applications," ensuring the plant grows steadily and robustly "strong but not excessive" from beginning to end. If chemical control is done poorly, it can cause excessive growth or stiff seedlings that do not develop, affecting the normal growth of cotton. Therefore, in the process of implementing chemical control, the dosage of the chemical control agent must be strictly controlled.
-
Detailed Explanation of Key Points of Bag Cultivation Technology for Sexual Propagation of Gastrodia elata
Gastrodia elata is a precious traditional Chinese medicinal herb, belonging to the orchid family as a perennial herbaceous plant. It has no roots and no green leaves, and mainly obtains nutrients by digesting fungi such as Armillaria mellea that invade its body. It contains vanillyl alcohol, vanillin, glycosides, vitamin A-like substances, crystalline neutral substances, trace alkaloids, and mucilaginous substances, and has the effects of tonifying qi and nourishing the liver, calming fright, extinguishing wind, and relieving spasms. The history of artificial cultivation of Gastrodia elata is not long, but cultivation technology has developed rapidly. In the past, artificial cultivation of Gastrodia elata generally used asexual propagation, and the seed tubers degenerated generation by generation, with low and unstable yields, greatly affecting production.
-
Detailed Explanation of the Production Technology for Sexual Propagation of Gastrodia elata
In recent years, in the Gastrodia elata production of our county, we have adopted the direct seeding sexual propagation technology of Gastrodia elata seeds to replace the previous vegetative propagation cultivation method. This not only saves labor and time, increases yield, and raises farmers' income, but also reduces the amount of timber harvested, which is beneficial to water and soil conservation in the Tongbai Mountain area at the source of the Huai River. It has achieved dual benefits and alleviated the conflict between mushroom cultivation and forestry. Because the sexual propagation technology of Gastrodia elata uses branches with a stem diameter of 3-6 cm, small wood, and broadleaf litter, each 0.5 sq m cultivation pit can obtain about 4 kg
-
Detailed Explanation of the New Technology for One-Time Massive Mushroom Flushing of Oyster Mushrooms
The so-called new technology for massive mushroom flushing refers to the use of a supporting set of techniques to force a one-time high yield at the first flush of mushrooms. This is a further improvement and strengthening of "simulated industrial cultivation technology," and practice has shown that the results are very good and that it can be promoted for use. This technology mainly consists of five steps: 1. Carry out virus elimination treatment on the spawn. "Good seed produces good seedlings" is a truth everyone knows, but indefinite preservation of spawn and continuous, unlimited subculturing can lead to problems such as trait degeneration or naturally carrying viruses and pathogens.
-
Biotechnology Assists Lily Variety Improvement
China is the natural distribution center of the genus Lilium. On this land, there are 47 species and 18 varieties of native lilies, which hold a very important position in the improvement of lily varieties worldwide. However, currently less than half of the original lily species are used in breeding, and there are still many original lily species with special superior traits that urgently need further development and utilization. Researchers at China's scientific research and teaching institutions have conducted a detailed analysis and study of the progress in lily variety improvement and biotechnology research in China. China's lilies have obvious advantages: Lilium dauricum, Lilium distichum, and others
-
Detailed Explanation of Fresh Peach Juice Processing and Production Technology
Raw material selection. Select fully ripe, fresh peaches free from pests, diseases and rot. Raw material pretreatment. Wash the raw material with water to remove the fuzz; after washing, rinse in a 1% hydrochloric acid solution or detergent solution to remove pesticide residues, then rinse again in water and drain. Remove the peach pits with a splitting and pitting machine. Soak the pitted raw material in a mixed solution of 0.1% vitamin C and citric acid for color protection. Heating and pulping. Heat the fruit pieces at 90-95°C for 3-5 minutes to soften them
-
Key Points of Packaging Sterilization Technology for Mashed Potatoes
Raw material formula: 10 kg of mashed potato, 2 kg of egg white liquid, 1 kg each of dextrin with a starch saccharification value of 20 and clean water, 300 g of vinegar, 6.7 g of xanthan gum, 26.6 g of agar. Operation points: add egg white liquid (solid content of about 10%), dextrin (solid content of 75%) and vinegar to the mashed potato; then add 0.05% xanthan gum, agar and clean water, mix thoroughly, and make mashed potato. Product characteristics: when the product has just been prepared
条件筛选