When the greenhouse cucumber enters the flowering and squashing period, it often happens that the cucumbers that grew well in the previous period suddenly fell dead within a few days. This phenomenon of acute dead seedlings of cucumbers often occurs rapidly and is difficult to control. The main causes are:
1. The reason for the weather. Persistent rain or after a sudden snowfall caused rapid death.
2. Reasons for release. The cucumber enters the flowering and nectar stage, and it is sunny and high-temperature, with a large amount of deflation and rapid transpiration of the foliage. Some plants with poor rooting begin to atrophy, and the entire plant wither water loss is withered.
3. Causes of frost damage. Part of the shed film was damaged, and plants were wilted and dead after the cold wind hit.
4. Reasons for fertilization. Fertilizer concentration is too high, especially if the fertilizer is applied near the base of the stem of the cucumber. Burns cause dead seedlings.
The phenomenon of acute death of cucumber can be prevented by the following measures:
1. Appropriate amount of water. The roots of cucumbers are more developed, but most of them are rooted in the surface of the soil. To avoid watering mistakes and inhibit root development. Less water is planted and the water is poured back to the seedlings. Low temperatures, high soil moisture, or even rainy weather, little or no water. Into the period of fruiting melons, combined with topdressing, with water, fertilizer, once every 10 days or so, to prevent excessive application of fertilizer once burned melon seedlings. It is better to water in sunny mornings and avoid watering in the afternoon and evening. Snowy days should not be watered in the whole shed, and the ground should be poured with small water.
2. Reasonably control the temperature in the booth. In the initial stage of colonization, it is generally not ventilated. It is maintained at 25°C-30°C during the daytime and 12°C-15°C at night. With the growth of the melon seedlings, the small air outlets can be gradually opened and the air is generally ventilated during daytime when the temperature rises to 30°C, and the greenhouse film is closed when the temperature drops to 28°C in the afternoon. The temperature during the melon period should not fall below 12°C.
3. Regularly manage the ditch around the cucumber planted in the shed to ensure smooth flow, so that irrigation can be performed timely. Every day to check whether the film is damaged or leak cover, such as damage should pay attention to timely repair. Before the advent of cool winds, cover the grasshoppers and lock the ropes to prevent cold winds from invading and injuring the melon seedlings.
4. After the shade is over, do not uncover all the grasshoppers. Open a few at a time to prevent the plants from losing water and wilting due to strong light. After 2-3 days, the plants gradually adapt to normal management.
Plant extracts refer to a class of substances derived from plants that have one or more biological functions. Can be separated by physical and chemical extraction of one or more effective components formed by natural products.
There are many kinds of plant extracts. At present, natural plant extracts mainly include essential oils, saponins, alkaloids, polysaccharides, polyphenols, flavonoids and so on. According to the biological activity, it can be divided into antioxidants: grape seed extract, green tea extract, pine bark extract, etc. Immune modulators: ginseng extract, gynostemma pentaphyllum extract, Ganoderma lucidum extract, etc. Improve cardiovascular function: ginkgo biloba extract, lotus seed heart extract, rhodiola extract, etc. Sedative: valerian extract, hop extract and so on.
According to their own characteristics in the market application of plant extracts can be roughly divided into six categories: coloring, seasoning, medicinal, health, dietary supplements and feed additives. Natural plant pigments refer to pigment components in roots, stems, leaves, flowers, fruits and bark of plants, such as turmeric, sappanwood, indigo, safflower, black bean and green walnut peel. Natural plant pigments are widely used in food, textiles, cosmetics, medicine, leather industry, printing and dyeing and other industries.
Plant extracts are rich in ingredients that can effectively stimulate the senses, such as sweeteners and volatile substances. Natural sweeteners, such as stevia glycoside and grosvenin, are popular new sweeteners. They are not only sweet, but also ideal substitutes for sucrose. Essential oils are concentrated volatile substances that are commonly used in the preparation of fragrances and are widely recognized in plant extracts.
Contained in the plant extracts of saponins, alkaloids, polyphenols, flavonoids and other ingredients are widely study has many biological activities, such as antioxidant, antibacterial, anti-inflammatory, improve animal production performance, antivirus, enhance immunity, etc., for human and animal health has the effect of nots allow to ignore, and the development of its pharmacology and health care function has become the main trend of plant extracts.In addition, as a dietary supplement, it is one of the main applications of various plant extracts. Such as oligosaccharides (oligosaccharides, oligosaccharides, oligosaccharides, galactose, etc.) dietary fiber, soybean protein, dietary fiber, wheat albumin, L-arabinose, sugar alcohol (xylitol, malt heavy sugar alcohol, sorbitol, etc.) and other natural plant food additives have been widely used in the food health care market. Many plant functional ingredients with anti-inflammatory, antioxidant and bacteriostatic properties are also commonly used as substitute anti-bacterial products. The application of green feed additives in livestock and poultry production has been vigorously developed, such as green tea polyphenols extract, pine bark procyanidins extract and polyanthocyanidins extract.
Due to the changes in lifestyle, working mode and consumption mode, more consumers are pursuing the life concept of "big health". The so-called "big health" refers to a concept of whole-process, comprehensive and total factor care for people's life around the basic necessities of life, life, old age, illness and death. It not only pursues individual physical and physical health, but also pursues mental, spiritual, social, environmental and family health. In the era of "great health", natural plant-based health products are the core and the key material basis.
With increasing attention to the food and drug safety, from natural plant in the development and utilization of the active ingredient is becoming more and more attention, a large number of food safety, have certain curative effect function of plant extracts have been used as raw materials in a variety of ways into functional food nutrition and health food has entered people's lives, and will play a more and more important role.
And more and more new research new discovery, predicts that the plant extract industry chain will have more members to join, there will be more business opportunities. The future domestic plant extract market will stride forward gradually to mature period!
Shaanxi Yingyuan Xingchuang Biotechnology Co., Ltd. is committed to plant extracts, advanced pharmaceutical intermediates, featured apis, and other customized research and development services; Relying on its GMP production base, it has set up a RESEARCH and development center and GMP pilot workshop to accelerate the commercialization process of production and research. The company has accumulated a number of invention patents, and has been declared by more than ten regulatory bodies such as China, FDA of the United States, EDQM of the European Union, India, Japan, South Korea and Australia. Please feel free to contact us.
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