According to the different management methods of irrigation water, there are various forms of rice breeding methods such as water breeding, wet breeding, dry cultivation, plastic film insulation, two-stage breeding, plastic floppy disk breeding and so on.
(1) Water-nursing pupa refers to the way of flood-control, which is based on flooding management, during the entire period of breeding. That is to say, water and soil, water as bed, and water sowing, the whole process of emergence, except for prevention of cotton rot, bad rot and rooting, has always established a water layer. This kind of breeding method often has bad seeds, bad shoots, low seedling emergence rate, weak and weak seedlings, weak crops and other shortcomings. It is a traditional method adopted in the rice region of China and is no longer advocated in production.
(2) Wet seedlings, also known as semi-dry seedlings and field seedlings, are a kind of breeding method between water seedlings and dry seedlings. They are water preparations, water beds, moist seeding, rooting, seedlings, seedlings, preserving, moistening, and ventilation. Department, rooted and established seedlings according to the water shortage situation in paddy fields, intermittent irrigation, mainly to wet. The way of raising seedlings is easy to regulate the contradiction between water and gas in the soil. After sowing, the seedlings are quickly emerged and emerged neatly, and they are not susceptible to physiological blight, which helps to promote seedling rooting, prevent rotten buds and seedlings, and can be promoted by water management. Controlling the growth of seedlings has become a basic breeding method for replacing aquatic seedlings.
(3) Insulation of plastic film is based on moist seedlings. After sowing, a layer of film is placed on the surface of the car, mostly covered by low arches. This way of breeding is conducive to heat preservation, Moisturizing, warming, early sowing in time, to prevent rotting buds, gills, and to increase the rate of becoming clams. It is necessary to prevent cold chilling in early spring.
(4) Drought-raising seedlings are the methods of raising the soil to keep the soil moist and not keeping the water layer during the entire breeding process. That is, rice seeds are sown in fertile, soft, deep, sponge-like dry land beds, no water layer is established, and appropriate amounts of water are used to cultivate rice seedlings. Dry rice cultivation in paddy rice depends on straw, manure and other decomposed organic fertilizers to increase soil fertility. Little fertilizer is used at the seedling stage. Bed soils have good permeability from top to bottom, which is conducive to cultivating strong roots, root hairs, and white roots. The better form of seedling quality. Dry seedlings are easy to operate, save time and labor, and do not waste water resources. However, in the past, there was no insulation or moisturizing covering, which often resulted from the shortage of water and emerged incompletely, and it was prone to bacterial blight and damage by the hamster. In recent decades, measures have been taken to increase cover film and prevent blight, and the method of heat preservation, drought, and seedling raising has become an important method for breeding strong, cold-resistant, drought-resistant, and water-saving rice in cold regions and double-season rice.
(5) Two-stage childbirth is a kind of breeding method that divides the entire childbirth process into two stages. In the first stage, three to four-leaf young seedlings are planted using dry sowing or moist seedling methods. In the second stage, the seedlings are staged. The young seedlings are planted with soil or without soil at a certain density and tilled. To send in the field, after the large and powerful seedlings to be cultivated, they will be transplanted to Daejeon. This is a kind of breeding technology suitable for late-planting. Its main advantage is that the rate of pod formation is high, the amount of seeds used is small, and the early onset is strong, and the contradiction of gargle can be adjusted. It is especially suitable for paternal pods that have a longer growth period when they are planted in mid-late rice, double-crop successive rice, and hybrid rice. The two stages of breeding can resolve the contradiction between early sowing and late planting and advance the earing period to avoid adverse effects such as high temperature during anthesis or low temperature during filling.
(6) Plastic floppy disk breeding is based on dry eucalyptus boring machine or boring machine in paddy field (based on the operation and management of dry nursery boring machine), using plastic floppy disk, artificial seeding, on-demand mixed seeding or seeder sowing. This way of raising children can increase the proportion of Honda, reduce the cost of breeding, and facilitate management. The quality of seedlings is good and the seedling stage is not easy to attack. The seedlings that are bred can be planted by hand, which is more conducive to throwing seedlings.
Functional oligosaccharides refer to oligosaccharides that are difficult or impossible to be digested and absorbed by the human body and have special physiological effects on the human body. Its sweetness is generally only 30-50% of that of sucrose, and it has physiological functions such as low-calorie, anti-caries, prevention and treatment of diabetes, and improvement of intestinal colony structure. Due to the special physiological functions of functional oligosaccharides, it becomes a nutrient and health care product. A new generation of food-effect raw materials that integrate diet and therapy. It is a new functional sugar source that replaces sucrose and has a wide range of uses and application prospects. Common functional oligosaccharides include: xylo-oligosaccharides, fructooligosaccharides, galacto-oligosaccharides, isomaltose, raffinose and so on.
XOS, GOS, FOS, IMO, Raffinose, oligosaccharide
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