According to the cultivation characteristics of winter wheat, fertilizer characteristics and agricultural production, we must do three things in scientific fertilization:
The first is to apply a good base fertilizer. The farmer said that “the wheat is rich in the fetusâ€, and there is a proper amount of nitrogen nutrition and phosphorus and potassium fertilizer in the seedling stage, so that the wheat seedlings are born early and have a certain amount of healthy tillers before winter, and they grow into ears, increase grain and gain weight after spring. basis. Generally set wheat production target of 500 kg / acre, the end 10 kg of urea per acre, 20 kg diammonium phosphate, potassium chloride 20 kg, the total effective total nutrient content of about 30 kg. If compound fertilizer is applied, it is calculated according to the amount of nitrogen, phosphorus and potassium contained in the fertilizer. Â
Followed by skillful topdressing. Topdressing is beneficial to increase and increase the ear. After the spring wheat seedlings in the northern winter wheat area are green, 10 kg of urea per acre can be used for the wheat fields with weak growth , ditch application or acupoint application, and watering can be done when conditions are met. For strong wheat fields, fertilizer management should be controlled during jointing. Lodging.
Finally, foliar fertilization is carried out in the late stage of wheat growth. At this time, the northern wheat area is often exposed to dry heat and wind damage. If you use 0 . 2% concentration of potassium dihydrogen phosphate (50 kg fertilizer per acre spray solution, with potassium dihydrogen phosphate 100 g), the heading and flowering spray 1 or 2 times, twice with an interval of 10 to 15 days, can promote wheat Grouting is strong and reduces the damage of dry hot air.
A mirror is any specularly reflecting surface, and in most large volume applications this reflective medium is aluminum coating. A back surface mirror has the reflective coating on the surface opposite the viewing surface, so it's imperative .
Front surface Optical Mirrors (also known as first surface optical mirrors) reflect light directly from the coating that is applied to the polished or working surface of the mirror.
First Surface Mirrors, the coated surface is to be facing the incident light in order to minimize energy loss by not allowing light to pass through the glass substrate.
The mirrors are available in circular, square, and rectangular dimensions. Rectangular first surface mirrors are ideal for applications requiring the mirror to be mounted at 45° in order to produce a 90° bend in the light path.
Front Surface Mirror,Front Surface Optical Mirrors,First Surface Mirrors,Front Surface Plane Mirrors
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