Before weaving grasshoppers, weeding in the field is the key technology that determines the success or failure of no-till farming. First of all, it is required that the first crop should be cut as low as possible, generally not more than 15 centimeters. Otherwise, if the steamed buns are difficult to rot, the regeneration rate will increase, and the seedlings will be easily placed on the buns. When no-tillage is thrown in the late season, care should be taken. In addition, it must be sprayed when the surface is dry, otherwise it can not achieve the effect of annihilation. In general, Guangdong uses a contact-killing herbicide g without a trace or a systemic herbicide glyphosate for herbicides, of which Gram-free is the preferred pesticide. The best way to use a traceless method is to spray 200-250 ml per mu, add 2-2.5 kg of ammonium bicarbonate or potassium chloride, spray 50-60 liters of water, and spray evenly on the rice piles. Weed stems and leaves, and pay attention to the missing spray place spray. After 3 days, the paddy fields were flooded and the water depth was suitable to submerge the rice piles. Applying calcium phosphate, ammonium bicarbonate, or compound fertilizer as basal fertilizer during flooding can accelerate the decay of rice piles and weeds. Soak for 3-5 days before throwing. Since the no-tillage and transplanting rice fields use the traceless weeding and quickening effect, the spraying can be carried out after soaking for 1 day after spraying for one day. This is more effective for the time-sensitive late season, but it must be carefully performed according to the specific circumstances. In addition, due to the control effect of some monocotyledonous weeds, such as alfalfa grass and goosegrass, in areas where such weeds are particularly prosperous, they can be used in combination with the systemic herbicide Roundup. Chemical herbicides are applied in conjunction with the first topdressing 1 days before or after throwing. 1st day before throwing, it can be used for Nongsiqi, Xiaocaoling or chloramine, etc. After weeding, weeding, early rice 4-5 days after throwing, late rice 3-4 days after throwing hoe, Evil grass spirit and so on.
Other medical tubes including a wide range of tubular medical products, such as endobronchial tube, tracheostomy tube, etc. An endobronchial tube is a kind of frequently-used medical tube related to a lung surgery, It is typically used in medical procedures such as bronchoscopy or during surgery to provide an Airway for the patient. Endobronchial tubes come in various sizes and left & right version to ensure proper ventilation. They are typically made of flexible materials such as PVC or silicone.
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