First, scientific application of fertilizer water. After the root melon is harvested, combined with watering, the fertilizer is applied once in a timely manner. After the autumn cucumber enters the melon period, water is usually poured once every 3-4 days. Take small water and water to avoid flooding. In this way, it can achieve drought, no stagnation, less pests and diseases, and can often cool down and improve the microclimate in the field. Usually, the water is poured once every time, and the fertilizer is chased once. The use of urea is 15-20 kg, and it is suitable to apply quick-acting phosphorus and potassium fertilizer, which has a good yield increasing effect. In case of heavy rain, pay attention to drainage. After each heavy rain, combine shallow weeding once. After entering the squash period in late August, no more cultivating and weeding. It is usually harvested once every 1-2 days. Second, pay attention to cold and warm. The farmer said: A burst of autumn winds, a burst of white frost. In September, it is in the solar terms of “Bailu†and “Autumnâ€. The weather turns from hot to cool, and the temperature is cool at night, and the temperature is cool, so it is necessary to strengthen warmth and cold. In early September, the autumn cucumber is still in the stagnation period, and a wind barrier is set up in the cucumber field, and a barrier is set up on the north side and the west side to reduce the invasion of the white wind and prevent the plant from premature aging. At the same time, spraying 0.5% potassium dihydrogen phosphate foliar fertilizer can prolong the harvest period and increase the later yield. In the middle and late September of September, the cucumber entered the late stage of melon, and the number of watering was reduced accordingly. Third, timely prevention of pests and diseases. Cucumber downy mildew can be used for prevention and treatment of 58% metalaxyl manganese zinc 500 times, Du Jie Kelu 600 times, 64% anti-virus 矾 800 times, 75% chlorothalonil. Insect pests mainly include greenhouse whitefly, aphids, spotted fly, and sassafras. It can be used with Akthai 5000 times liquid plus Kungfu Kid Oil 2000 times to 3000 times. Spraying once every 7 days can achieve the control effect. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone 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.
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