With the adjustment of the planting structure, more and more farmers are planting potatoes. However, due to the impact of traditional fertilization, only fertilizer and diammonium are used as the bottom fertilizer on potato fertilization, and no top dressing is used. The average amount of fertilizer used by a potato is (pure) 10 kg / mu nitrogen, 5 kg / mu phosphorus, 5 kg / mu potassium, which translates to 300 kg of urea, 150 kg of 64% diammonium, and 50% potassium sulfate. 150 kg. To obtain high-quality and high-yield potatoes, the following fertilizers should be used as fertilizers in the planting process: 1. Base fertilizer. The base fertilizer is applied with high-quality farm manure combined with chemical fertilizer. All the farm manure and phosphate fertilizer, 50% nitrogen fertilizer, and 70% potassium fertilizer are used as the base fertilizer. The method of fertilization is furrow or hole application before planting, and the fertilization depth is 15 cm. 2. Topdressing. Topdressing twice: â‘ Fertilizer protection is carried out after the seedlings are promoted to promote the growth of stems and leaves. The amount of fertilizer applied is 2/3 of the remaining nitrogen fertilizer. The method of fertilization is to apply water to the remaining plants. â‘¡ Promote potato fertilizer before the plant is planted and at the stage of potato setting. The dosage is: 1/3 nitrogen fertilizer and 30% potassium fertilizer. Fertilization method: Strip application or hole application, 10 cm in depth to prevent fertilizer loss. Potatoes are more sensitive to zinc and boron fertilizers. Foliar spraying can be used to apply zinc and boron fertilizers. 50-70 kg of fertilizer solution per mu can be sprayed every 7 days and sprayed 2-3 times. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone
Processing high-throughput samples, intelligent reuse for large-capacity publishing, work surface: 200cm, 8 sample injection needles, 12 temperature-controlled incubation positions, 12 room temperature incubation positions, 32 plate storage positions, Sunrise microplate reader, HydroFlex plate washer, up to 512 specimens, sequential loading of samples, reagents, microplates Parallel loading of up to 6 plates for fast dispensing.
The automatic enzyme immunoassay analyzer is based on the principle that the enzyme and the substrate can produce a color reaction, the absorption lines of different substances have different characteristics, and strictly abide by the Lambert-Beer law, quantitative and qualitative analysis of substances. instrument. The method of analyzing the content of various enzymes such as antigen or antibody generally mainly adopts colorimetric method. In practice, spectrophotometry is the basic working principle of an automatic enzyme immunoassay analyzer. The light emitted by the light source lamp becomes a beam of monochromatic light after passing through a filter or a monochromator. The monochromatic light beam passes through the sample to be tested in the microtiter plate, and part of the monochromatic light beam is absorbed by the sample and reaches the photodetector. The intensity of the light signal projected on it is converted into the magnitude of the electrical signal by the photodetector. This electrical signal is processed by pre-amplification, logarithmic amplification, analog-to-digital conversion, etc., and then sent to the microprocessor for data processing and calculation, and the test results are output by the display and printer. The microprocessor completes the movement in the X and Y directions of the mechanical drive through the control circuit. ELISA analyzer,enzyme immunoassay workstation,automatic enzyme immunoassay analyzer,automatic enzyme immunoassay system Jilin Sinoscience Technology Co. LTD , https://www.jilinsinoscience.com
The automatic enzyme immunoassay analyzer adds the sample to the microwells of the pre-coated antigen or antibody microtiter plate, washes after the reaction, removes the unseparated ligand, then adds the enzyme isolate, after incubation, washes again , remove the unseparated compound, and then add the enzyme substrate, after the reaction, the colored final product is formed, and the stop solution is added to stop the reaction. The absorbance of each microwell of the microtiter plate is read by the wavelength that has been set by the spectrophotometer. The concentration value of the analyte in the sample is calculated by the absorbance value of the sample and the standard curve, so that the quantitative result can be obtained, or the absorbance of the sample is compared with that of the standard product, so that the positive or negative qualitative result can be obtained.