The technical points of double-season rice one-time full-layer fertilization are:
Scientific fertilizer formula technology. The high-yield double-season rice has relatively consistent fertility, nutrient characteristics and fertilizer absorption rules, that is, the above-ground dry matter accumulation and nutrient uptake are mainly in the middle and late growth stages, but the soil in the early stage of fertility is required to have a large fertilizer supply intensity per unit area. The main nutrient content required for rice production is roughly constant. Generally speaking, for every 100 kg of rice produced, it requires 2.1 to 2.4 kg of nitrogen, 0.9 to 1.3 kg of phosphorus pentoxide, and 2.1 to 3.3 kg of potassium oxide. Nitrogen: Phosphorus oxide: Potassium oxide is 1:0.43:1.
Modern fertilizer manufacturing technology. The soil has a good adsorption capacity for many nutrient segregants, so that the fertilizer nutrients applied to the soil are not leached. Under the paddy soil conditions, the main loss pathways for the application of ammonium nitrogen fertilizer in the soil are ammonia volatilization and nitrification-denitrification; the soil-fixed phosphate fertilizer can be slowly released later for crop absorption, thus having a certain residual effect. Potassium fertilizer and ammonium nitrogen fertilizer have similar chemical behaviors in the soil, but no loss of volatile and denitrification. Modern fertilizer manufacturing studies have shown that using modern fertilizer granulation technology and coating technology, adding a certain proportion of different types of clay minerals to the fertilizer and coating the fertilizer with clay minerals can delay the release of fertilizer. It can meet the demand for nutrients in the whole growth period of double-season rice, and can effectively improve the utilization rate of fertilizer.
Full-layer base fertilizer deep application technology. That is, before the last ploughing of the double-season rice in the early and late rice transplanting, under the premise of controlling the soil moisture, all the fertilized fertilizers are applied, and the farming measures are combined to make the fertilizer and the whole ploughed soil fully mixed. Soil and fertilizer blend together.
Double-season rice one-time full-layer fertilization technology can fully exert the adsorption capacity of soil nutrients, avoid ammonia volatilization of ammonium nitrogen fertilizer and loss of “nitrification-denitrification†and leaching loss of various nutrients, and improve fertilizer nutrient The utilization rate can form a strong soil fertility intensity in the early stage of rice growth, prompting the rice to grow early and grow quickly, and improve the growth potential of the rice in the early growth stage; it can guide the roots of the rice to tie down, and ensure the growth of rice in the middle and late growth stages. Strong absorption, no premature aging; can promote the release of soil nutrients, enhance soil fertility, and improve soil nutrient availability.
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