1. Apply organic fertilizer. The application of organic fertilizers is an important measure in the cultivation of high-quality rice and is the basis for achieving high quality and high yields. Organic fertilizers are mainly used as basal fertilizers. Generally, 40-50 tons of manure is used per acre before plowing, or 40-50 kilograms of cake fertilizer. In addition, 40-50 human and livestock manure can also be used as surface fertilizer before ploughing and after flooding to ensure the nutrient requirements for returning green seedlings after transplanting.
2, control the amount of nitrogen fertilizer. Excessive application of nitrogen fertilizer will not only result in increased ineffective delivery, greediness, lodging, and pest and disease intensification, but also cause more empty grains and seed setting rate, affecting rice yield. Nitrogen fertilizers are mainly used as topdressing fertilizers. Generally, 6-7 kg of urea are applied per acre after transplanting rice, and urea is applied 4-5 kg ​​per acre for the second 13-15 days after transplanting. Hey. In the medium term, it is necessary to pay attention to controlling the water and controlling the fertilizer. Only the second and third types of seedlings with poor growth are supplemented with some balance fertilizers as appropriate, and the seedlings in the latter stage will see 3-5 kg ​​of grain fertilizer.
3. Increase phosphorus and potassium fertilizers. Phosphorus fertilizer is suitable for base fertilizer, and potassium fertilizer is better for topdressing. Generally, 20 kg of phosphate fertilizer is applied per acre in a sufficient amount of organic fertilizer, and 3.5-5 kg ​​of potassium chloride can be applied per acre as potash fertilizer. The late spraying of potassium dihydrogen phosphate can promote grain filling, usually in the late stage of heading and flowering and during the grain-filling period. Each time, it uses 150 grams of monopotassium phosphate and 50-60 kilograms of water every evening to spray.
4. Apply foliar fertilizer to foliage. Trace elements such as zinc, manganese, and boron can improve the supply of oxygen in rice roots, increase the resistance of rice plants, increase plant disease resistance, promote root development in the later period, prolong leaf function, prevent premature aging, and accelerate flower development. , Increase the amount of pollen, promote pollen germination, is conducive to increase the rate of rice spikes; also promote the large panicles, increase the seed-filling rate and the degree of grain filling, thus increasing rice yield. According to experiments, under the same conditions of cultivation and management measures, the application of trace element fertilizer can increase the yield by 40-50 kilograms per acre. The application of zinc, manganese, boron and other trace elements in rice is generally better when sprayed twice. The first time during childbirth, the second time during the completion of spikelet differentiation. The application rates of zinc, manganese, and boron fertilizers are 100-125 grams per mu, and the spraying concentration is: zinc is one thousandth; manganese and boron are five ten thousandths. The application of foliar fertilizers requires cloudy days or sunny afternoons, which are focused on the front and back of the leaves.
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