Gansu Peasant Net - Gansu Farmers News October 29 1. Cultivated soil In combination with cultivator before freezing, the soil is cultured on the root side, which can loosen the soil, protect the root system, and enhance the vitality of the root system. The cultivator depth should be 7-10 cm. 2. Clearing ditch, lift the car to warm up Rainy weather, high humidity in the field, coupled with insufficient light, are detrimental to the growth and development of vegetables. At this time, the management focuses on freezing and warmth, clearing trenches, clearing the trenches, gutters, gutters, and lifting away from the car, enhancing the air permeability of the car and increasing the ground temperature. It is not only beneficial to the winter's antifreeze and cold resistance, but also beneficial to the coming year. Anti-mite moisture in the spring. 3. Apply more organic fertilizer and less nitrogen fertilizer Spraying 0.2% to 0.3% potassium dihydrogen phosphate aqueous solution 1 or 2 times before low temperature can enhance the cold resistance of vegetables. Spraying 400-500 kilograms of thin human and animal waste water per acre can reduce soil freezing and improve the ability of vegetable roots to resist cold. 4. Smoke or wind barrier Before the advent of frost, the accumulation of weeds, straw, litter and other accumulations of smoke in the upwind can effectively disperse the cold currents and protect the vegetables from freezing damage. Also, in the north of vegetable plots, straws and other materials are used to make a wind barrier of 1 to 1.5 meters high to prevent cold winds from directly invading vegetables and reducing freezing damage.
Real Time fluorescence quantitative PCR system is a variation of the standard PCR technique that is commonly used to
Using sequence-specific primers, the number of copies of a particular DNA or RNA sequence can be determined.
By measuring the amount of amplified product at each stage during the PCR cycle, quantification is possible.
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quantify DNA or RNA in a sample.