First, looking at the soil organic matter content of organic matter content of less than 1.5%, the effect of phosphorus application is the best; the organic matter content of 2 to 2.5% of the soil, the effect of phosphorus is not significant. Therefore, phosphate fertilizer should be applied preferentially to soils with low organic matter content.
Second, look at the soil quality to determine the phosphate fertilizer varieties in neutral and calcareous alkaline soil, should be applied water-soluble superphosphate, superphosphate is weakly acidic, can neutralize the alkali in the soil; in acidic soil should be applied weak base Sexual calcium magnesium phosphate fertilizer. The application of alkaline phosphate fertilizer in acid soil can not only enhance its fertilizer efficiency, but also neutralize the acidity of the soil and avoid acid damage to wheat roots.
Third, look at the effective phosphorus content of the soil Phosphate fertilizer should first meet the lack of phosphorus fields and the thin field. Generally, the available phosphorus in the plough layer is less than 5-10 ppm. The effect of using phosphate fertilizer is the most significant; the effective phosphorus content is about 20 ppm, and the use of phosphate fertilizer has a certain yield increase effect; the effective phosphorus content is higher than 30 ppm, and the use of phosphate fertilizer is not obvious. Therefore, phosphate fertilizer should be applied to wheat fields with an effective phosphorus content of less than 15 ppm, especially less than 10 ppm.
4. Layered application of phosphate fertilizer Phosphate fertilizer has small mobility, while a large number of secondary roots of wheat are mainly distributed in soil layers within 10 cm before winter, so 1/4 to 1/3 of phosphate fertilizer should be applied to shallow soil of 5-10 cm. In the layer; 1/2 to 2/3 is applied in a deep soil layer of 15 to 25 cm. Take the pre-sow ditch application, plow the base or apply the seed dressing, avoid the ground surface.
5. Phosphate Fertilizer and Organic Fertilizer Mixed Application Winter Wheat Various phosphate fertilizers should be mixed with high-quality organic fertilizer in a ratio of 1:10 to reduce the contact surface between phosphate fertilizer and soil, and the acidic substances in organic fertilizer can help to increase phosphate fertilizer. The effectiveness of the phosphate fertilizer has greatly improved.
6. In the middle and late stages of the spraying of phosphorus fertilizer in the middle and late stages or in the absence of phosphate fertilizer, a small amount of calcium perphosphate leaching solution may be sprayed 1 to 2 times in the seedling stage, jointing stage and booting stage of wheat, ie, per acre. Each time, 1 to 1.5 kg of calcium phosphate is used, crushed into powder, soaked in an appropriate amount of water for a day and night, filtered to remove the clear liquid, and sprayed on water 50-60 kg. If 0.5 to 1 kg of urea and grass ash leaching solution are sprayed in the mixture, the effect of increasing the yield is better.
The utility model discloses a Kitchen Shower head that is convenient to switch the water outlet mode, has a compact structure, and is easy to use, and a kitchen faucet using the kitchen shower head. , The shower head is provided with a water separator, and the water separator is provided with an annular flow channel and an inner flow channel respectively connected to the spray water outlet body and the V-shaped water outlet body, and the lower end of the outer wall of the water separator is upwardly circular A plurality of water inlet holes connected to the annular flow channel are provided, and a first sealing ring is provided on the lower side of the water inlet hole; the water outlet end of the shower body is connected with a converter, and the converter is provided with a communicating In the water diversion cavity at the water outlet end of the shower body, the lower end of the water diversion device is installed in the water diversion cavity and can move up and down, and the upper end of the inner wall of the water diversion cavity is provided with a convex ring matching the first sealing ring, so The bottom surface of the water diversion cavity is provided with a sealing gasket that can seal the inner flow channel.
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