Seedlings, carrots like light, seedlings after Qi Qi and time seedlings. The first time the seedlings were in 1 to 2 true leaves and the seedling height was 3 cm. The density of seedlings was 3 to 5 cm 2 ; the second time the seedlings were 7 to 10 cm in height, and 6 to 7 square meters were used. Cultivate the centimeters is appropriate; for the third time, the seedlings are to be planted at a plant height of 15 to 20 centimeters, preferably 10 square centimeters. Fertilizer, carrot growth period, in addition to base fertilizer, but also topdressing 2 or 3 times, to control the amount of nitrogen fertilizer, or easily lead to leaf length, affecting the expansion of fleshy root, top dressing to thin, or easily lead to roots. The first top dressing is applied 20 to 25 days after emergence, and the seedling age is 3 to 4 leaves, using urea, superphosphate, and potassium chloride, plus a small amount of decomposed fecal urine; the second topdressing is after emergence. 40 to 50 days (after seedlings), applying urea, superphosphate, potassium chloride, add a small amount of human faeces. Irrigation, carrot leaf area, evaporation, root system developed, strong absorption, more drought-resistant. Generally, the soil moisture is maintained at 60% to 80%. After the long meat roots of carrots are sprayed on the roots, the fruit is used to enhance the quality of the meat. Watering should stop when the roots of the meat are fully inflated. Magnetic Bead Acid Nucleic Extraction Kit
In order to implement the requirements for the prevention and control of the new coronavirus pneumonia epidemic, all parts of the country are actively cooperating in the normalization of epidemic prevention and control. Each city has arranged multiple nucleic acid testing sampling points, and requires a negative nucleic acid test result within a few days. Public places are accessible, and the importance of nucleic acid testing for epidemic prevention and control is self-evident. Magnetic Bead Acid Nucleic Extraction Kit,Viral Dna Extraction Kit,Viral Rna Extraction Kit,Rapid Viral Rna Extraction Kit Jilin Sinoscience Technology Co. LTD , https://www.contoryinstruments.com
As of now, there are 13,000 medical and health institutions in the country that can carry out nucleic acid testing, and 153,000 professional and technical personnel are engaged in nucleic acid testing technology. The nucleic acid testing capacity has reached 57 million tubes per day. In order to help the prevention and control of the new crown epidemic, Yisheng Biology quickly launched the nucleic acid extraction reagent + 96-channel automatic nucleic acid extraction instrument. It only takes about 10 minutes to extract 96 nucleic acid samples at one time, and extract nucleic acid in a faster and more accurate way. Work becomes more efficient.
Magnetic Bead Swab Sample Viral DNA/RNA Extraction Kit can be used to isolate and purify high-quality viral DNA/RNA from various swabs and virus culture supernatants. By using magnetic beads with unique separation function and carefully optimized buffer system to efficiently capture the released nucleic acid, the extracted nucleic acid has high yield and good quality, which is suitable for various downstream application experiments, such as RT-qPCR, qPCR and other experiments.