At present, autumn sorghum vegetables are planted one after another. This 茬 vegetable grows in the high temperature and drought season, and the management difficulty is relatively large. Many vegetable farmers report that the first few spikes of this vegetable are prone to deformed fruit, which is why many people do not leave the first spike, do not leave the root melon, do not leave the pepper, and the eggplant.
In addition to the environmental factors, the prosperous plant is a major cause of poor flower bud differentiation, low fruiting rate, and many deformed flowers and fruits.
Plant growth leads to imbalance in nutrient supply
The flowering and fruiting period of vegetables is generally the critical period of nutrition. During this period, the demand for nutrients in vegetables is very sensitive, and the factors affecting the supply of nutrients in plants are mainly concentrated on the movement distribution of nutrients in plants, soil fertility, roots. The three aspects of absorptive capacity. In actual production, many vegetable farmers control plant growth by adjusting the growth environment and using growth hormone during the period from slow seedling to flowering. The purpose is to maintain the balance between vegetative growth and reproductive growth. In the hot season, vegetables are prone to prolonged conditions. The vegetative growth is too strong, and a large amount of mineral nutrients are competed for, so that less nutrients are supplied to the flower buds, resulting in an imbalance of nutrient supply, resulting in lack of nutrients, resulting in abnormalities of flowers and fruits. .
Reasons for the longevity of autumn vegetables
First, the current temperature is high, especially at night, and the temperature difference between day and night is small.
The second is that most of the base fertilizers are planted when the vegetables are planted, especially the large amount of chicken manure is applied in the base fertilizer, while the chicken manure contains a lot of nitrogen, especially ammonium nitrogen, and the ammonium nitrogen is beneficial to promote the plants. Nutritional growth.
Third, in order to reduce the ground temperature, vegetable farmers often water the water, which also led to the growth of the tree.
Reasonable control of anti-vegetable
The prevention and control of vegetables is prosperous. The first priority is to adopt sunshade cooling measures to control the temperature inside the shed. In addition, the following points should be noted in production:
Before the fruit setting, the top dressing should be cautious. If the bottom fertilizer is applied adequately, it is rarely topdressed before fruit setting. In order to cultivate strong seedlings, the vegetable farmers can only apply some biological fertilizer or rooting agent in the seedling stage; if the base fertilizer is applied less, plus If the loss of watering fertilizer is serious, and the plant will be de-fertilized with yellow leaves, it should be properly topdressed.
Control the amount of watering and the number of watering in summer. In order to reduce the temperature, vegetable farmers tend to water more often. It is recommended that watering should not be too frequent before seeding to fruit setting. The moderate drought of soil is conducive to promoting root system. When watering, it should be changed to flood water to pour small water, that is, watering along the water, the water can flow to the head. If the growth of vegetables is found to be too strong, water should be properly controlled, but water control should not be excessive, so as not to affect the normal growth of vegetables.
For example, in the case of tomatoes, don’t rush to hang the vines, let the plants fall down first, and suppress the top edge of the plants. Before the first spike flower of the tomato is flowered, the section of the base of the tomato stem is about 30 cm long to fall to the north to inhibit the vegetative growth of the plant, promote the reproductive growth of the tomato, and promote the fruit setting. If it is planting autumn delay tomatoes, because the temperature will be lower and lower, the temperature difference is getting bigger and bigger, which is conducive to the vegetative growth of tomatoes to the reproductive growth, so the tomato should be lowered. It is generally necessary to slant a section of the stem of the tomato stem about 20 cm long.
If you plant the flowers in advance, if the plant grows prosperously, you can leave the first ear fruits in the early stage, and inhibit the vegetative growth of the plants in the form of fruit falling trees, balance the growth of the plants, and improve the second and third inflorescences. Developmental quality.
On the basis of the above measures, if there are still signs of prosperity, it can be controlled by spraying growth points such as auxin and chlorophyll.
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An organic compound formed by dehydration of amino acids, containing carboxyl and amino groups, and being amphoteric. Also known as "peptide".
Two, one of the amide. It consists of two or more amino acids joined by the amino group of one amino acid to the carboxyl group of the other. An amino acid cannot be called a peptide, nor can a peptide be synthesized, but must be a compound of two or more amino acids linked by a peptide bond. Compounds where two amino acids are linked by a peptide bond are called dipeptides; A compound with three amino acids linked by peptide bonds is called a tripeptide, and so on, a compound with thirty-four amino acids linked by peptide bonds is called a thirty-four peptide.
A peptide is a chain of polymers of amino acids
A peptide is a chain of polymers of amino acids
Three, is related to the biological body of a variety of cell functions of biological active substances. Hundreds of peptides have been found in living organisms, which are essential participants in the body's complex physiological activities. All cells can synthesize peptides and their functional activities are regulated by peptides. It involves hormones, nerves, cell growth and reproductive fields, and its importance lies in the regulation of various systems, organs and cells in the body. The physiological and pharmacological effects of enzymatic polypeptides are mainly to activate related enzymes in vivo, promote the permeability of intermediate metabolic membrane, or affect specific protein synthesis by controlling DNA transcription or translation, and eventually produce specific physiological effects or play their pharmacological effects. Peptide is better than amino acid, one is faster than amino acid absorption; Second, it is absorbed by the body in a complete form; Third, active absorption (amino acids are passive absorption); Fourth, low consumption, compared with amino acids, peptide absorption has the characteristics of low consumption or no energy consumption, peptide absorption through the duodenum, directly into the blood circulation, their own energy nutrition transported to various parts of the human body; Fifth, peptide absorption is less than amino acid, with the characteristics of unsaturated; Sixth, there are only 20 kinds of amino acids, with countable functions, while peptides take amino acids as substrates, which can be synthesized into hundreds of thousands of kinds.
It is mainly divided into medical polypeptide drugs, peptide antibiotics, vaccines, antimicrobial peptides for agricultural use, small peptides for feed, cosmetics for daily use, soybean polypeptides for food, corn polypeptides, yeast polypeptides and sea cucumber peptides.
From the functional point of view, can be divided into antihypertensive peptide, antioxidant peptide, cholesterol lowering peptide, opioid active peptide, high F value oligopeptide, food strong taste peptide and so on.
Active peptide, and nutrition, hormone, enzyme inhibition, regulation of immunity, antibacterial, antiviral, antioxidant has a very close relationship. Polypeptides are generally divided into: polypeptide drugs and polypeptide health products. Traditional peptide drugs are mainly peptide hormones. The development of peptide drugs has been developed into various fields of disease prevention and treatment, especially in the following fields. [2]
Antitumor polypeptide
Tumorigenesis is the result of many factors, but ultimately all involve the regulation of oncogene expression. In 2013, many tumor-related genes and regulatory factors have been discovered. Screening peptides specifically bound to these genes and regulatory factors has become a new hot spot in the search for anticancer drugs. For example, somatostatin has been used to treat endocrine tumors of the digestive system; American scholars found a hexapeptide can significantly inhibit adenocarcinoma in vivo; Swiss scientists have discovered an octapeptide that induces apoptosis in tumor cells. [2]
Antiviral polypeptide
By binding to specific receptors on host cells, viruses adsorb cells and rely on their own specific proteases for protein processing and nucleic acid replication. Therefore, peptides binding to host cell receptors or active sites such as viral proteases can be selected from the peptide library for antiviral therapy. In 2013, many small peptides with antiviral properties have been screened from peptide banks in Canada, Italy and other countries, and some small peptides have entered the stage of clinical trials. In June 2004, the Chinese Academy of Sciences institute of Microbiology came out of the news, which was undertaken by the Chinese Academy of Sciences known
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