In the middle of growing celery, the stem swells rapidly and expands. If the supply of nitrogen fertilizer is too large at this time, the supply of potash will be insufficient, the elongation of the stem will be blocked, the leaves will be drooping, and the color will be too green. Not only the fiber will increase, but also the pest and disease will increase, and the yield will drop drastically. Very poor. Therefore, attention should be paid to controlling nitrogen and potassium at this time. The specific methods are as follows:
In the middle stage of growing celery, strong stalk fertilizer is applied, mainly nitrogen, phosphorus and potash fertilizers, and the application amount of potash fertilizer is appropriately increased, and as little or no nitrogen fertilizer is applied as possible, and nitrogen, phosphorus and potassium (15-15-15) compound fertilizer per acre are applied. 15 to 20 kg, 8 to 10 kg of potassium sulfate, nitrogen, phosphorus, potassium compound fertilizer and potassium sulfate are thoroughly mixed and mixed, and then applied to the soil around the root of celery, and then the water is solubilized to dissolve the fertilizer; Apply or rinsing water to moisten the soil around the celery root, and then evenly spread the fertilizer in the soil.
RT-PCR Test Reagent Kit Of COVID-19(ORF1ab, N)
The RT-PCR Test Reagent Kit Of COVID-19(ORF1ab, N) is a real-time RT-PCR test intended for the qualitative detection of nucleic acid from the SARS-CoV-2 in upper and lower respiratory specimens (such as anterior nasal swabs, mid-turbinate nasal swabs, nasopharyngeal swabs, oropharyngeal swabs, sputum, lower respiratory tract aspirates, bronchoalveolar lavage, and nasopharyngeal wash/aspirate or nasal aspirate) from individuals suspected of COVID-19 by their healthcare provider.
Results are for the identification of SARS-CoV-2 RNA.The SARS-CoV-2 RNA is generally detectable in upper and lower respiratory specimens during the acute phase of infection.
Positive results are indicative of the presence of SARS-CoV-2 RNA; clinical correlation with patient history and other diagnostic information is necessary to determine patient infective status. The agent detected may not be the definite cause of disease. Positive results do not rule out bacterial co-infection with other viruses.
Negative results do not preclude SARS-CoV-2 infection and should not be used as the sole basis for patient management decisions. Negative results must be combined with clinical observations, patient history, and epidemiological information. The COVID-19 RT-PCR Detection Kit is intended for use by qualified trained clinical laboratory personnel specifically instructed and trained in the techniques of real-time PCR and in vitro diagnostic procedures.
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