Application of Feilong in Rice Formula fertilization

1. The long-term synergistic effect of ①, which has the advantages of Feilong, can prolong the effective period of nitrogen fertilizer by one time, and there is no de-fertilization in the whole growth period of rice. ② increased nitrogen use efficiency, and deep fertilization overcame fertilizer loss due to water leakage in the field, and reduced fertilizer loss. ③ enhances the resistance of rice to low temperature, drought and disease erosion. ④ changed from multiple fertilization in the traditional surface layer to one-time fertilization in the deep layer, which saved the labor and cost of fertilization. ⑤ reduces the amount of nitrogen fertilizer, and the pure nutrient content of nitrogen fertilizer can be reduced by 15% to 25% according to the plots with different fertility.

two。 During the application period of Feilong, ① fertilized before turning the soil, sprinkled all kinds of element fertilizers mixed with Feilong in the field first, and then turned the soil. ② fertilizes before soaking, sprinkle mixed fertilizer first, and then soak the field. ③ fertilizes before raking, sprinkles mixed fertilizer after soaking the field, and then begins to rake the ground.

3. The preparation method of Feilong is scientifically based on topography, soil quality, soil fertility, fertilization quantity, last year's planting varieties and yield. The amount of phosphorus applied to ① is 10 kg per mu, and it can also be mixed with compound fertilizer, that is, 6-7 kg of diammonium phosphate and 9-10 kg of compound fertilizer (N 15, P 15, K 15), that is, 4.5 kg / mu of pure phosphorus. The amount of potassium applied per mu is 6.5-7.5 kg, that is, 11-13 kg of potassium chloride or 13-15 kg of potassium sulfate. The amount of nitrogen element applied per mu, the fertility of the formula nitrogen application is poor, or the varieties with longer growth period (160-165 days) and the plots with higher water retention difference should be reduced by 15%-20%; the varieties with better fertility or shorter growth period (130-135 days) should be reduced by 20%-25%; the mid-and late-maturing varieties with medium fertility or growth period of 155-158 days should be reduced by 20%.

In the formulation of nitrogen fertilizer, attention should be paid to the amount of urea. For the low-lying varieties prone to waterlogging or short growth period, or the plots where a certain amount of farm manure has been applied, the amount of urea per mu is 1213 kg; in the high or sandy leaking land or saline-alkali land, the amount of urea per mu is 15,17 kg; the amount of urea per mu in the medium plot of 4 days and 5 days in the water-retaining layer of fertile terrain is 13,15kg. At the same time, it is equipped with ammonium chloride or ammonium sulfate 1517kg per mu, and ammonium bicarbonate 810kg per mu. Combined application of other elements, that is, 1.5 kg of magnesium zinc sulfate (96%) per mu, 0.5 kg of fertiliser fertilizer and other micro-fertilizers.

For the combined application of Feilong, the amount of Feilong can be calculated according to the nitrogenous fertilizer allocation table marked on the package surface of Feilong. The upper limit of scalar is used for varieties with poor fertility or longer growth period, the lower limit of scalar for varieties with better fertility or low-lying plots or shorter growth period, and the middle limit for medium fertility and varieties. the cumulative addition of each nitrogenous fertilizer is the total amount of fertilizer used per mu in the plot. After the calculation of fertilizer allocation, it should be checked and marked out the pure nutrient content of each element (N, P, K) applied to the plot per mu, which should be preserved by farmers and prepared for fertilizer adjustment next year.

4. Problems needing attention in the use of Feilong ① due to one-time application of fertilizer into the field during the whole growth period, be careful when spreading fertilizer, less water should be used when raking the ground, and fine rakes should be used with agricultural machinery. The rice seedlings in the ② application plot grow smoothly, and the leaves are not dark green in the field of fractional fertilization, but don't rush to top fertilize easily. When the leaves are light green or the number of tillers is insufficient at the edge of the ③ field and at the mouth of Shangshui, ammonium bicarbonate can be applied (usually on June 20-25), with or without ammonium chloride and ammonium sulfate as much as possible, let alone urea, so as not to cause greed and late maturity, premature senility and lodging.