The greenhouse production of green food in the greenhouse requires the soil to be loose and soft, with moderate sand and sticky, organic matter, rich soil and fertilizer, good structure, complete nutrients, sufficient fertilizer, strong fertility, large number of microorganisms, high activity, and acid and alkali. Appropriate, appropriate oxidation and reduction, soil moisture, water supply, strong water retention, good ventilation, suitable temperature and other fertility traits. Therefore, high-quality, high-quality organic fertilizers must be applied frequently to maintain and increase soil fertility. We use fresh cow dung, chicken dung, wheat bran, etc. as the main raw material for high-quality fertilizers. And in accordance with 4 copies of cow dung, chicken dung 4 parts, wheat bran 2 parts mixed heap compost into compost. First, heap rot conditions 1, moisture: moisture content of 60 ~ 75% of the weight of heap rot material is appropriate, that is, with iron gongs made into a group, throwing scattered. Wheat bran must be pre-soaked with enough water before it is mixed with cow dung and chicken manure. 2. Ventilation: Since the heap rot in the early stage is mainly a good gas decomposition, the fertilizer heap should not be pressed too tightly, and some vent holes can be set for corn stalks. The late stage of dumping is mainly due to gas decomposition, which can compact the fertilizer heap and cover with a plastic sheet to facilitate the preservation of nutrients and the accumulation of humus. 3, temperature: 55 °C ~ 65 °C high temperature for about a week, prompting high-temperature microorganisms to strongly decompose organic matter, while killing the eggs of pathogens, and then turning piles in time to cool, in order to facilitate the temperature of microbial activity, promote effective nutrient conversion and humus Synthesis. 4, pH: Microorganisms are suitable for neutral to slightly alkaline conditions, organic matter will produce a variety of organic acids and carbonic acid in the process of heap rot, so that the acidity of the compost is enhanced, so the 5% turfgrass ash and a small amount of Potassium calcium fertilizer can adjust the pH. 5. Ratio of carbon to nitrogen: The C/N ratio of the heap rot material, especially the wheat bran, is large. Adding 5% pure NP to the compound fertilizer can reduce the C/N ratio, promote decomposition, and preserve N nutrients and improve composting. The role of quality. Second, due to the effect of fertilizer on the scientific heap, so decomposed organic fertilizer, soft texture, rich organic matter, N, P, K, and the amount of trace elements, and adequacy. Both potential nutrients and quick-acting nutrients provide stable and lasting fertilization. The one-time application of base fertilizer for growing melon in the greenhouse not only has good growth potential, but also has strong disease resistance, large fruits, and high sugar content. In the whole process of growth and development of melon, it is not necessary to top-dress fertilizer and pesticides, but only suitable amount of water. water. Labor-saving and time-saving, low cost, good economic returns.
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.
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.
Magnetic Bead Acid Nucleic Extraction Kit,Viral Dna Extraction Kit,Viral Rna Extraction Kit,Rapid Viral Rna Extraction Kit
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