How to apply wheat "five fertilizers"

Applying wheat base fertilizer to base fertilizer is an important measure to improve soil fertility in wheat field. It can ensure the nutrient requirement of wheat seedling growth, promote early fast-growing, and make wheat seedling grow strong enough tiller and strong root system before winter, and it is spring. Growth lays the foundation. The wheat base fertilizer is mainly based on farmyard manure, and the appropriate amount of nitrogen, phosphorus and potassium chemical fertilizers are applied. The amount of base fertilizer should be determined according to the type, nature, soil, etc. of the fertilizer required for production. Generally, the farmer's fertilizer is 1000~1500 kg, the urea is 10 kg, and the 45% compound fertilizer is 25 kg.

When planting fertilized wheat with appropriate amount of available nitrogen and phosphate fertilizer as seed fertilizer, it can promote wheat rooting and seedling growth, increase tillering and increase yield, and have significant yield-increasing effect on late buckwheat and wheat with insufficient base fertilizer. Application of thiamine as a seed fertilizer can increase yield by about 10%. Nitrogen fertilizer is generally used as seed fertilizer with 5 kg of thiamine or 2.5 kg of urea per acre. Phosphate fertilizer is used as seed fertilizer, and calcium superphosphate is sprinkled on the soil surface. The soil is mixed and then sown, generally 5-8 kg of calcium phosphate per acre. The ammonium carbonate is volatile and causes the seed burn to be used as a seed fertilizer. For the soil fertile or the base fertilizer is sufficient, the fertilizer can not be applied.

Topdressing is based on the need for nutrients in various stages of wheat growth and development. Topdressing is an important measure to obtain high yield.

In the early stage of tillering of seedlings, applying 5-10 kg of ammonium carbonate or 3~5 kg of urea per acre or a small amount of human excrement can promote the growth of seedlings and increase the tillering before winter, especially for the basic seedlings. Or late sowing wheat, the effect of early application of seedling fertilizer is good, but for the wheat field with sufficient base fertilizer and seed fertilizer, the seedling fertilizer can not be applied.

The application of semi-fast-acting and late-acting farmyard manure is mainly for the application of quick-acting fertilizers for the three types of seedlings, in order to promote the long-root tillering, grow into strong seedlings, and promote the rapid growth of the three types of seedlings. Lighten and upgrade.

Look at the seedlings to return to the green fertilizer for poor fertility, insufficient base fertilizer, late sowing, less tiller before winter, weak growth of wheat fields should be applied early or heavy application of green fertilizer, generally 5 to 10 kg per mu.

Applying the jointing fertilizer is the application of the wheat tiller peak, promoting the formation of panicles, increasing the rate of ear formation, promoting the differentiation of small flowers, and striving for large spikes. Generally, about 45% of compound fertilizer is applied per mu.

The ear-fertilizer and the ear-fertilizer are mainly nitrogen fertilizers, which are used in a small amount, generally 3 to 5 kg per mu.

After the early fertilization of wheat, some nitrogen, phosphorus, potassium and other elements are still needed after the heading. At this time, the aging absorption capacity of the wheat roots is weakened. Therefore, the root external dressing method is generally adopted. In the early stage of wheat grain filling combined with wheat ear mites, spraying 1% urea per mu and 0.2% potassium dihydrogen phosphate solution 30~40 kg can effectively improve the ability of wheat to resist dry hot wind, delay leaf senescence and increase 1000-grain weight. To achieve the purpose of increasing production.

Carriage Bolts

Generally speaking, the Bolt is used to connect two objects, usually through the smooth hole, which needs to be used together with the nut, and a single bolt does not work. The tools are usually spanners. The head is mostly hexagonal, generally larger. The carriage bolt is used in the groove. The square neck is stuck in the groove during the installation process, which can prevent the bolt from rotating. The carriage bolt can move in parallel in the groove. Because the head of the carriage bolt is round, there is no cross groove or inner hexagon, which can be used to assist the design of tools. In the actual connection process, it can also play the role of anti-theft.

Materials: carbon steel, Q235, 45? Steel, stainless steel

Nominal diameter: 5mm-20mm

Length: 15mm -- 300mm

Surface treatment methods: zinc plating, chromium plating, copper plating, surface blackening

Carriage Bolts,Railway Bolts And Nuts,Guardrail Bolts And Nuts,Automotive Thread Rod Bolts

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