Winter wheat tube note two points
Promote the two heads are mainly used for better grounds, large groups after the winter, there is a risk of lodging wheat. After applying basic fertilizer, cultivating strong seedlings, promoting effective delivery, and reaching sufficient populations, control the fertilizer at the returning green stage (7 to 9 leaves of the main stem) to reduce ineffective tillering, inhibit internode elongation, and solve high yields. The contradiction of lodging, spikes and spikes. Specific methods: It is recommended that organic fertilizer should be used as a base fertilizer at a rate of 2,500 to 3,000 kg/mu, 10 to 15 kg/mu urea, 40 to 50 kg/mu of calcium phosphate, and 10 kg/mu of potassium chloride, as appropriate. Determined; after jointing, according to urea 5 ~ 10 kg / acre, potassium chloride 5 kg / acre applied to attacking panicle fertilizer, may also be determined as appropriate. Before nitrogen shift This technique is mainly applicable to fields with high soil fertility levels and good irrigation water conditions. It is no problem that the number of ears in these fields is ideal, but the role of grains per spike and grain weight is relatively increased. Specific methods: It is recommended that basal fertilizer should be applied in an amount of 2000 to 2500 kg/mu for organic fertilizer, 5 to 10 kg/mu for urea, 40 to 50 kg/mu for calcium phosphate, and 10 to 15 kg/mu for potassium chloride. As appropriate; early in the spring without top dressing; after the jointing of wheat, when the polarities are markedly different, fertilizer and water strike at the same time, and in combination with watering, generally 50 kg of ammonium bicarbonate or 10 to 15 kg of urea per mu, which may be determined as appropriate; Watering, it is recommended to apply 5 kg of urea per acre to reduce the degradation of small flowers, and promote the number of large spikes; spraying 1% to 2% of urea and 0.3% of potassium dihydrogen phosphate solution 30 to 40 kg per acre foliar . Weeding In the past, wheat weeds were mostly controlled in the spring, resulting in some stubborn weeds that were difficult to remove. To this end, we must vigorously promote the winter chemical weed control technology in wheat field to ensure that “drug to grass†is eliminated. 1, wheat banned before the three-leaf period. Before the wheat trifoliate stage, the resistance of wheat seedlings was very poor. During this period, the use of pesticides could easily cause wheat injury. The distortion of the light leaves affected the yield. In severe wheat, the heading could not be normal. 3, master the medication time. Herbicide efficacy is greatly affected by light, temperature and soil moisture. The light is sufficient, the temperature is high, and soil moisture is suitable for the use of drugs. Therefore, as early as possible in the wheat three-leaf stage and all weeds are unearthed. 4, choose the herbicide varieties. For herbicides with tribenuron-based weeds such as wheat straw, leeks, rice vases, pigweed, and broad-leaved weeds, and grassy weeds such as wild oats, bromegrass, and fronds The herbicides that can be used mainly include the World Code; for the combination of broad-leaved weeds and grass weeds, tribenuron-methyl can be mixed with the World Code. 5, reduce the amount of application. In the winter wheat field weeds, seedlings with poor resistance to insecticides are easy to control, and the application amount can be reduced as compared with the spring season. The recommended minimum dosage for herbicides can be used. 6, application methods. Before herbicide spraying, the herbicide should be converted into mother liquor and then added with water. In order to make the spraying uniform, the amount of water should be appropriate, and the amount of liquid used per mu should not be less than 30 kg. When spraying, the spraying speed and nozzle height should be high. The spray width is basically the same, so that it does not leak or spray. Implanted surgical instruments pack
Medical blister is divided into three categories according to the safety of its use: the first category refers to medical devices that are safe and effective enough to be guaranteed through routine management. The second category refers to the medical devices that should be controlled for their safety and effectiveness. The third category is implants to sustain life; Potentially dangerous to the human body, its safety, effectiveness must be strictly controlled medical devices.
Different from ordinary medical device Packaging and production environment requirements
1. Production environment requirements: clean workshop of the same grade;
2. Mold requirements: aluminum alloy mold with high precision is selected for production, copper mold and gypsum mold will produce mold, only aluminum alloy mold is relatively safe mold;
3. Choose environmentally friendly sheet: ensure that the blister packaging will not affect the device after contacting it. General medical device manufacturers will carry out another cleaning and mold process when packaging;
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2. All weeds were used after being unearthed. Wheat field herbicide is a stem and leaf treatment agent, and only the spraying of the liquid on the weeds has control effect, and the use of the weed on the unearthed soil has no effect. 