A low-lying flooded paddy field A portion of late rice is planted in lower-lying paddy fields. After the typhoon, flooding will occur. Some paddy fields and even a vast ocean will seriously affect the production of late rice, especially in autumn, and the following measures must be taken in time. The flooded rice is treated. (a) Drain as soon as possible. Rice, which is in vegetative growth stage, is most tolerant of flooding and flooding for more than 48 hours can cause rice to die. Drain the water as soon as possible so that the tips of the rice are exposed to the surface as quickly as possible. After the water is discharged, the damaged fields, inlets and drains shall be repaired. Drainage should be thorough to ensure that the rice roots have good permeability and promote root growth as soon as possible. (b) Remove dirt from the leaves. Post-disaster rice leaves often have a layer of sediment attached to them, which affects the photosynthesis of the leaves. When the sky is clear and the leaves are white, use the rope to pull up the leaves. This will shake off the mud on the leaves and the leaves will be green. (c) Prevention and control of pests and diseases. After the typhoon, wounds appeared on many leaves and it was easy to cause diseases. Late rice is most prone to bacterial and bacterial blight, sheath blight, rice blast, bacterial streak, aphid and rice planthopper. For the above diseases and insect pests, the following pesticides can be used for prevention and control: 1. Bacterial blight prevention and treatment: Use 20% Ye Qing double wettable powder 75 to 100 grams per mu, mix water 15 to 20 kg, evenly spray. General application of 2 times is appropriate, separated by 9 to 14 days as well. 2. Sheath blight prevention and treatment: Spray 40% Jinggangmycin in 80-100 ml water per mu for 30 kg. 3. Prevention of rice blast disease: Use 45% tricyclazole WP per 100 grams watered 30 ~ 50 kg, evenly spray. General application of 2 to 3 times, interval 7 to 10 days. 4. Prevention and treatment of bacterial streak disease: Use 20% Ye Qingshuang 100g/mu, water 30kg, evenly spray. General application of 2 to 3 times, interval 7 to 10 days. 5. Control of locusts: Use 20% triazophos EC 100 to 150 ml watered 30 to 50 kg or 90% insecticidal single wettable powder 40 to 60 grams per mu, and spray 30 to 40 kg evenly. 6. Prevention of rice planthoppers: Use 20 grams of 20% Puproxacine WP per acre, and mix evenly 15-20 kg of water. (d) spraying foliar fertilizer. After the typhoon, the leaves are seriously damaged and the foliar fertilizer must be sprayed in time to protect the leaves, maintain the leaves, and extend the life of the functional leaves. You can spray foliar and potassium dihydrogen phosphate. Generally use 15-30 milliliters per acre with 100 grams of potassium dihydrogen phosphate, water evenly sprayed 30 kg, general spraying 2 ~ 3 times is appropriate. (e) Reasonable irrigation. In the middle and later stages of rice growth, it is appropriate to alternate dry and wet irrigation, and it is not necessary to establish a layer of water. This can maintain the vitality of the root system, reduce the humidity in the field, and reduce the incidence of rice. (six) pay attention to the application of potash fertilizer. Potassium fertilizer can not only enhance the lodging resistance of rice, but also increase rice disease resistance and rice quality. Therefore, in order to improve rice resistance after the disaster, we must pay attention to the application of potash fertilizer. Per acre can be applied potassium chloride 7.5 kg to 10 kg. Second, the treatment of lodging rice fields In the late stage of grouting, rice will show signs of lodging under the influence of typhoons. The following measures can be taken: (1) Rice that has not been fully laid down on the ground can be rescued by manually tying it into small pieces. You can use nylon ropes or weeds. This will prevent any unacceptable harvest. (2) The number of late irrigation should be strictly controlled in the lodging rice fields. Each irrigation must be dry and dry, so that the former water can not see the rear water. (C) pay attention to the prevention and control of pests and diseases, the same way as above. (4) Pay attention to the application of NPK fertilizers in the middle and later stages. Due to the influence of typhoon, the loss of nutrients in paddy field is serious. To prevent premature degeneration of fertilization, we must pay attention to the application of N, P and K fertilizers in the middle and later stages. Apply 7.5 kg of potassium chloride and 5 kg of compound fertilizer per mu. Tungsten Carbide Roll Rings, also known as hard alloy roller ring, has been widely used in the rolling production of high-speed wire, bar, threaded steel, seamless steel pipes, etc. due to its good wear resistance, high-temperature hardness, heat fatigue resistance, thermal conductivity, and high strength. Tungsten Carbide Sleeve,Tungsten Carbide Roller, Steel Rebar Rolling,Steel Wire Rod Rolling,WC Roller Luoyang Golden Egret Geotools Co., Ltd , https://www.xtclasercladding.com
The Tungsten Carbide Roll Rings we produce mostly come in two series: WC Co and WC Co Ni Cr, with Co and Co Ni Cr as binders ranging from 6wt% to 30wt%. From a usage perspective, hard alloy rollers have good comprehensive mechanical properties, with a bending strength of over 2200 MPa and an impact toughness of (4-6) × At 10 ^ 6J/m ^ 2, the Rockwell hardness (HRA) can reach 78~90. During the high-speed wire rolling process, the single groove steel passing amount is much higher than that of cold hard cast iron or high-speed steel rollers.
Rice disaster management technology