1. Light management Light is more important for the growth of cucumbers. Adequate light can enhance the photosynthesis of cucumbers and increase the accumulation of nutrients in plants. In the case of continuous rainy days, the cover must be lifted for a period of time. Many friends feel that it is useless without the sun open and it will also lower the temperature, causing cucumber growth discomfort. In other rainy weather, if the cover is lifted, the cucumber can still be used for photosynthesis, because there is scattered light in the sky, and it can also properly heat the plants.
2. When the plant adjusts the cucumber to fall, it should be careful not to drop it too low, too low affects nutrient absorption and is not conducive to plant growth. After successful planting, the plants should be controlled at about 1.4 to 1.6 meters, and the leaves on the plants should not be less than 15 pieces, so as to enhance photosynthesis and promote plant growth. Timely thinning of melons is the key. Many of the reasons for seedling harvesting are because the number of melons has exceeded the load of the plants. The melons on the plants should be controlled within the plant's tolerance, and they should be harvested in time to provide sufficient nutrition and growth space for the new melons. The leaves of the aging yellow leaves on the plant should also be removed in time to reduce unnecessary nutrient supply.
3. Fertilizer management When encountering low-temperature and low-light weather, the frequency of watering should be reduced, especially in winter, the frequency of watering should be controlled at about 3 weeks, and water should be irrigated with small water to prevent Cucumber freeze injury. Do not ventilate immediately after watering. Wait until the greenhouse temperature rises to about 28℃~32℃ before ventilating. When ventilating, pay attention to the vents. Do not open the vents all at once. They should be slowly opened to allow the cucumber to adapt. When fertilizing, it is mainly mixed with water and washed together. Pay attention not to apply too much.
4. Disease prevention and control Diseases are also one of the main causes of cucumber seedlings, such as brown spot disease, downy mildew, etc., these are frequently occurring diseases of cucumber. To follow the principle of prevention first, supplementing prevention and control, regularly inspect melon sheds, observe the plants, and ensure that there are no diseased plants in the greenhouse, and there are no signs of disease. After discovery, the diseased plants should be pulled out and brought out of the melon shed. Control the spraying of chemicals in the greenhouse, and ventilate in time after spraying, otherwise there will be phytotoxicity. Control the concentration of the drugs when applying the drugs. Excessively high will also have a certain inhibitory effect on cucumbers.
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Extraction Kit Magnetics Bead Method
This standard specifies the terms and definitions, classification, technical requirements, test methods, identification, labels and instructions for use, packaging, transportation and storage of nucleic acid extraction kits (magnetic beads method) (hereinafter referred to as "kits"). This standard It is suitable for extracting and purifying human genomic nucleic acid and its fragments from various clinical samples such as serum, plasma, whole blood, cerebrospinal fluid, milk, saliva, urine, sputum, swab, tissue or paraffin-embedded tissue by magnetic bead method , Pathogen nucleic acid kit. Pathogen nucleic acid includes deoxyribonucleic acid (DNA), ribonucleic acid (RNA), etc. This standard does not apply to nucleic acid extraction reagents contained in closed systems that cannot extract nucleic acid extraction products for detection.
This kit uses magnetic beads with unique separation function and a unique buffer system to separate and purify high-quality virus from serum, plasma, lymph, cell-free body fluid, cell culture supernatant, urine or various virus preservation solutions DNA/RNA. The uniquely embedded magnetic beads have a strong affinity for nucleic acids under certain conditions, and when the conditions change, the magnetic beads release the adsorbed nucleic acids, which can achieve the purpose of rapid separation and purification of nucleic acids. The whole process is safe and convenient, and the extracted viral DNA/RNA has high yield, high purity, stable and reliable quality, and is especially suitable for automated extraction of high-throughput workstations. The nucleic acid purified by this kit can be applied to various routine operations, including RT-PCR, fluorescence quantitative PCR and other downstream experiments.
Nucleic Acid Lsolation Reagent Kits,Dna Purification Kit,Viral Rna Extraction Kits,Nucleic Acid Extraction Reagents
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