Long-acting urea application "four suitable four bogey"

Long-acting urea is a new type of manure produced in recent years, containing 46% nitrogen, soluble in water and neutral. It is made by adding a certain proportion of urease inhibitor in the common urea production process, which can slow down the conversion speed of urea in the soil, prolong the fertilizer effect period, reduce the loss, stabilize the fertilizer and increase the utilization rate of nitrogen. The test proved that the long-acting urea fertilizer has a period of 90 to 120 days, and the nitrogen utilization rate can be increased to 55%. However, if the application is improper, the fertilizer effect will be reduced, and the correct application should be “four suitable and four bogey”.

Four should be: One should be applied to the thin soil, the crop yield increase effect is significant, and the economic benefits are improved. It should be applied to woody plants and long-lived herbaceous plants. When applied on short crops in the growing season, the utilization rate of nitrogen in the current season is low, and the yield increase effect is not high. Sanyi should be used as a base fertilizer to maintain a long-term fertility. For example, in the winter, the orchard and the tea garden are deeply turned into long-acting urea as the base fertilizer, and the effect is very good. If used as a top dressing, it should be used early and applied deep into the soil layer of 8 to 12 cm. Siyi should be combined with available nitrogen, phosphorus and potassium to adjust the nutrient ratio of quick-acting fertilizer and slow-acting fertilizer, so that they are complementary in length and uniformity, and avoid crop yield reduction due to de-fertilization.

Four bogey: one bogey and alkaline fertilizer mixed application or simultaneous application, winter and spring season should be staggered for 7 to 8 days, summer and autumn should be staggered for 3 to 4 days, so as not to cause nitrogen loss. The second is for the seed fertilizer, because the biuret in the long-acting urea is poisonous to the seed, which can inhibit the seed germination, so it is not suitable for seed dressing. Watering should be carried out immediately after the application of the three bogey. Watering should be carried out in the winter and spring seasons 7 to 8 days after the application, and watering should be carried out in the summer and autumn seasons 2 to 3 days after the application to avoid the loss of organic nitrogen. The application time of the four bogey is too late, and it should not be applied in the late stage of crop growth or foliar application, so as to avoid the late maturity of the crops and reduce the utilization rate of fertilizer. (Three Gorges Agricultural Information Network)
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Bellows Weighing Module

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