Key points of high quality rice fertilization technology

1. Apply enough organic fertilizer. The addition of organic fertilizer is an important measure in the cultivation of high quality rice and is the basis for achieving high quality and high yield. Organic fertilizer is mainly used as the base fertilizer. Generally, 40-50 tons of succulent mature soil per acre is applied before ploughing , or 40-50 kg of cake fertilizer . In addition, 40-50 of human and animal manure can be applied as a noodle fertilizer before ploughing and watering to ensure the nutrient needs of the seedlings after they are transplanted.

　　 2. Control the amount of nitrogen fertilizer. Excessive application of nitrogen fertilizer will not only cause ineffective tillering, greed, lodging, and intensification of pests and diseases, but also lead to more empty mites and lower seed setting rate, which will affect rice yield. Nitrogen mainly used as fertilizer top dressing, rice transplanting usually after 6-7 kg of urea per acre, the second binding plowing 4-5 kg of urea per acre in 13-15 days after insertion, to facilitate hair stump Strong. In the medium term, attention should be paid to water control and fertilizer control. Only the second and third types of seedlings with poor growth should be used to supplement some balanced fertilizers. In the later stage, the seedlings should be supplemented with 3-5 kg of grain fertilizer .

　　 3. Increase the application of phosphorus and potassium fertilizer. Phosphate 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 field with sufficient organic fertilizer . As a potash for potash fertilizer, 3.5-5 kg of potassium chloride can be applied per mu . Spraying potassium dihydrogen phosphate in the late stage of rice can promote the grouting and firming. Generally, it is sprayed once in the late stage of flowering and the filling stage. 150 g of potassium dihydrogen phosphate per acre and 50-60 kg of water are sprayed in the evening.

　　 4 , the leaf surface to apply micro-fertilizer. Trace elements such as zinc, manganese and boron can improve the supply of oxygen in rice roots, enhance the resistance of rice plants, improve the disease resistance of plants, promote the development of roots in the later stage, prolong the functional period of leaves, prevent premature aging, and accelerate the development of flowers. Increase the amount of pollen, promote the pollen germination, and help to increase the rate of rice emergence; it can also promote the large number of spikes, increase the seed setting rate and the grain filling degree, thereby increasing rice yield. According to the experiment, under the same cultivation management measures, the ratio of trace element fertilizer is not applied mu yield 40-50 kg, administered rice zinc, manganese, boron and other trace elements, preferably two spraying generally . The first time in the peak period, the second time in the completion of the young spike differentiation. The application rates of zinc, manganese and boron fertilizers are 100-125 grams per mu , and the spraying concentration is: one thousandth of zinc; manganese and boron are each five ten thousandths. Foliar requirements dressing cloudy or sunny afternoon into the selected row, the blade sides focused spray.