Under the condition of 300-400 kg/mu of production level, the total amount of fertilization is: nitrogen fertilizer (N) 10-12 kg/mu, phosphate fertilizer (P2O5) 4-5 kg/mu, potash fertilizer (K2O) 5-6 kg/mu. (2) The area where the soil is effectively deficient in zinc should be applied with 1 kg/mu of zinc sulfate. In the proportion of fertilization, phosphorus, potassium fertilizer and zinc fertilizer are all used as base fertilizer, 50% of nitrogen fertilizer is used as base fertilizer, and 50% is used as top dressing. The base fertilizer is ditched deep, or evenly spread on the surface before the cultivated land, and then ploughed underground, flattened, and planted. According to local conditions, the joint fertilizer is applied, and the wheat generally enters the jointing stage in late February to early March. The timing of top dressing is generally reduced in the wheat population, the leaf color is lighter, and the regular top dressing at the base of the stem is suitable. The amount of top dressing can generally be applied according to 40%-50% of the total nitrogen application rate of wheat, and 10-12 kg of urea is applied per mu. The method of topdressing can be done by spraying or spraying after spraying. Spray 1%-2% urea solution (plus 0.2-0.3% potassium dihydrogen phosphate solution) from the booting stage to the early filling stage, and spray 50-60 kg per acre. Foliar topdressing is best carried out after 4 pm on a sunny day, and sprayed again at intervals of 7-10 days. If there is rain within 24 hours after spraying, it should be sprayed once. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
[Sample requirements] Vtm Sampling Tube With Swab,Disposable Collection Tube Of Virus Samples,Hi Media Vtm Kit,Amylase Sample Collection Tube Jilin Sinoscience Technology Co. LTD , https://www.jilinsinoscience.com
The collected nasopharyngeal swab samples should be transported at 2°C to 8°C and sent for inspection immediately, and the sample delivery and storage time should not exceed 48 hours.
[Testing method]
1. Before sampling, mark the relevant sample information on the label of the sampling tube.
2. According to different sampling requirements, use a sampling swab to sample in the nasopharynx.
3. The specific sampling methods are as follows:
a) Nasal swab: Gently insert the swab head into the nasal palate, stay for a while and then slowly turn to exit. Wipe the other nostril with another swab, immerse the swab head in the sampling solution, and discard the tail.
b) Pharyngeal swab: Wipe bilateral pharyngeal tonsils and posterior pharyngeal wall with a swab, also immerse the swab head in the sampling solution, and discard the tail.
4. Quickly put the swab into the sampling tube.
5. Break the part of the sampling swab higher than the sampling tube, and tighten the tube cover.
6. Freshly collected clinical specimens should be transported to the laboratory within 48 hours at 2°C to 8°C.
[Explanation of test results]
After the sample is collected, the sampling solution turns slightly yellow, which will not affect the nucleic acid test result.
[Limitations of the test method]
1. For samples that are seriously contaminated due to improper storage after collection, the final test results will be affected.
2. If the sample is not stored at the specified temperature, the final test result will be affected.