Plant extracts are based on plants as raw materials. According to the needs of the use of the final product extracted, through a physical and chemical extraction and separation process, one or more effective ingredients in the plant are obtained and concentrated, without changing the effective ingredients. The product formed by the structure. Herbs Extract,Plant Extract,Functional Additives,Traditional Chinese Medicine PYSON Co. ,Ltd. , https://www.pysonbio.com
To set seedlings in the morning. In order to prevent excessive seedling density, causing overcrowding, competing for sunlight, consuming large quantities of water and nutrients, and affecting the cultivation of strong seedlings, it is necessary to establish seedlings as early as possible. Usually in the three-leaf seedlings, five leaf stage Dingmiao, or at the 3-4 leaf stage for a one-time, Dingmiao can also be. When thinning, it is necessary to stay weak and strong, to stay small to stay large, to stay pure, to stay healthy. In addition, weeds should be removed from the seedlings at the same time to prevent grass shortage.
To top-dressing. After the emergence of the first true leaf flat, it should be topdressing. Generally, a low concentration of 1,500 kilograms of human and animal manure is applied per acre. One week before transplanting, per acre topped with urine 1000-1500 kg or 3-4 kg urea. In the middle, we must chase the fat once again. Seedlings such as normal growth, can not be applied; such as the leaves from green to yellow, slow growth, urea can be used per 0.25 kilograms of water 2 poured pouring.
To control pests and diseases. The main pests of rapeseed seedlings are root maggots, aphids, and cabbage caterpillars. These pests not only damage the leaves but also drill the roots and stems of the pods directly. The locusts can also transmit viruses and other diseases. 50% malathion sulfate emulsion can be sprayed 1500-2000 times, spraying 50-70 kilograms per acre, and spraying 2-3 times. In addition, it is best to spray carbendazim and thiophanate every third leaf stage and 6-7 days before transplanting to prevent the occurrence and spread of diseases such as downy mildew and sclerotia.
1. According to the content of active ingredients, it can be divided into three types: effective monomer extract, standard extract and ratio extract;
2. Divided into glycosides, acids, polyphenols, polysaccharides, terpenes, flavonoids, alkaloids, etc. according to ingredients;
3. According to the product form, it can be divided into vegetable oil, extract, powder, lens, etc.
4. According to the purpose, plant extracts can be divided into natural pigment products, traditional Chinese medicine extract products, extract products and concentrated products.
There are several classifications of some of the best-selling plant extracts in the world. For example, Rhodiola, Ginkgo biloba, Ginseng extracts are used in the field of brain strengthening, nourishment, and prevention and treatment of Alzheimer's; polypeptide extracts of green tea, Citrus aurantium, apple, and bitter gourd Used in weight loss, lowering blood sugar and preventing diabetes; Paclitaxel, tea polyphenols, theanine, bioflavonoids, such as lycopene, anthocyanins, etc. are used in natural anti-cancer fields; licorice, garlic, astragalus, soybean extract Used in the field of human immune system.
Rapeseed strong seedlings catch "four to
It is better to drought. After sowing, rape often meets drought. Therefore, the nursery should always be watered and kept moist. Before emergence, insist on watering sooner or later; if drought persists after emergence. When the leaves of the seedlings are wilting, it is necessary to timely pour the waste water, and add 1-2 scoops of decomposed human excrement to each of the water. At the same time, when there is too much rain, drains should also be cleared, and wood ash should be sprinkled on the bed to reduce the temperature.