I. Land selection The land with deep soil layer, sufficient sunshine, convenient transportation and convenient drainage and drainage is selected as the experimental site. The soil is required to be finely divided and leveled, and the ring field is opened. Second, the nutrition cup seedling nutrition cup seedling can ensure the whole seedling, the seedling is strong, not easy to be affected by insects and rats, easy to grasp the orientation when transplanting. 1. Preparation of nutrient soil: use 500 kg of fat mud, 200 kg of cow faeces, 25 kg of superphosphate, and 25 kg of potassium chloride for 5 days. 2, sowing time: spring sowing is March-April, autumn sowing is July-August. 3, soil preparation: each cup of nutritious soil 02 kg, two seeds per bag, and then a layer of thin fine soil, and then arranged in a row, covered with nylon film insulation, moisturizing, rain. The film is sprayed in the middle to ensure the seed germination and emergence. Third, when transplanting corn seedlings to 4-5 leaves in a timely manner, one cup of strong seedlings per cup is transplanted, and 40 kg of domestic compound fertilizer is used for the mu, and the strip is applied as a base fertilizer. At the time of transplantation, the first cotyledon was perpendicular to the row direction, and then the soil was covered. The specification was 27 cm and 65 cm, and the plant was planted with 3,750 plants per mu. 4. Management of Daejeon 1. Early application of strong seedling fertilizer: When the transplanted corn grows to 6-7 leaves, the drought irrigation combined with the application of 15 kg of ammonium bicarbonate as a balanced fertilizer. 2, heavy application of strong stalk attack and attack fertilizer: When the corn grows to 9-10 leaves, the application of 40 kg of imported compound fertilizer is combined with cultivating weeding and small cultivating soil. When the length is 12-13 pieces, 20 kg of imported compound fertilizer is applied, combined with large soil. 3, pest control: 2 days before the corn is bred, 40 ml of double-effect pyrethroids to control corn mash and aphids, while spraying a Jinggangmycin powder to control sheath blight. The results showed that it is a feasible and feasible measure to plant corn with high yield and cultivated seedlings. Generally, the suitable density is 3500-4500 plants per mu. Directional cultivation can make full use of light and temperature resources. The direction of the ear position is consistent, easy to pollinate naturally, and it is also convenient for artificial pollination. As long as the water and fertilizer conditions and management level keep up, the quality of corn will eventually be obtained. high yield. The technology is suitable for high-yield areas and areas with high levels of farming management. 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.
Nucleic Acid Lsolation Reagent Kits,Dna Purification Kit,Viral Rna Extraction Kits,Nucleic Acid Extraction Reagents Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com
Seedlings, directional cultivation, high quality and high yield of corn