Summer sweet pepper fertilization technology

Fertilizer characteristics The peak of nutrient absorption of sweet pepper is in the result period. The absorption of nitrogen gradually increases with the growth process; the absorption of phosphorus increases with the growth process, but the extent of absorption changes is small; the absorption of potassium is less in the early growth stage, and the absorption increases significantly from the early stage of fruit harvesting. It continues until the end of harvesting; the absorption of calcium also increases with the growth process; the maximum absorption of magnesium occurs during the fruit harvest period, and the absorption at the early stage of growth is less.

Fertilization technology Nitrogen and potassium fertilizers are divided into base fertilizers and three times of topdressing application. Phosphate fertilizers are all used as base fertilizers. Summer cultivation, high ground temperature, should be applied with low carbon and nitrogen organic fertilizers, such as fully decomposed chicken manure, try not to use dry chicken manure, duck manure and bean cake. The base fertilizer is applied with 2500~3000 kg of organic fertilizer per acre, 8~10 kg of urea, 15~20 kg of diammonium phosphate and 10~12 kg of potassium sulfate. During the expansion period of the pepper, 10~12 kg of urea and 5~8 kg of potassium sulfate are applied per acre; in the period of pepper expansion, 12~14 kg of urea and 7~8 kg of potassium sulfate are applied per acre; During the period, 9~10 kg of urea and 5~6 kg of potassium sulfate were applied per mu. In the case of calcium deficiency, magnesium deficiency or boron deficiency, 0.3% calcium chloride, 1% magnesium sulfate or 0.1% to 0.2% borax may be sprayed 2~3 times.

Cermic Ball Bearing

The full ceramic ball bearings listed below are supplied with rings and balls made from zirconium dioxide (ZrO2). These zirconia bearings are available as full complement (no cage) or with cages made from PTFE, PEEK or 316 stainless steel.

These are non magnetic, non-conductive and highly corrosion resistant to most chemicals although ZrO2 bearings are not recommended for prolonged contact with steam. Full complement bearings or those with a 316 stainless cage can be used up to 400°C while bearings with a PEEK or PTFE cage can cope with temperatures of up to 250°C. For temperatures below -70°C, PTFE or 316 stainless steel cages are preferred. Standard radial clearance for full ceramic bearings is C0 but other clearances can be supplied to order.

ZrO2 ceramic bearings are generally used for their extreme temperature capabilities, excellent corrosion resistance or non-magnetic properties. Other sizes can be supplied on request.

The Description of Ceramic Bearings:



Compared to steel, Ceramic ball Bearings have many specific advantages. They offer superior corrosion and heat resistance, higher dimensional stability, and lower density, which facilitate high speed. Ceramics are superior to steel in heat and corrosion resistance, and are lightweight and extremely hard as well. Consequently, ceramic rolling bearings can be used in environments where conventional steel bearings cannot. That is to say, the superiority of these bearings makes it possible that they can be applied in some special environments.

Firstly, they can be used in corrosive environments. Compared to stainless steel bearings, hybrid and all Ceramic Bearing lasted three and twenty times longer respectively. It is presumed that water readily adheres to silicon nitride and forms a better lubrication film, leading to extended bearing life.

Secondly, they can be performed in corrosive agents. Generally, silicon nitride has excellent corrosion resistance. However, corrosion resistance varies depending on the type and quantity of sintering additives, and certain corrosive agents decrease in hardness and flexural strength. In such situation, it is can be proved that the carbide-based ceramic bearings are the most effective.

Thirdly, they can be used in high-temperature vacuum. An all-silicon nitride Ball Bearing with a self-lubricating laminated cage (mainly composed of MoS2) and with MoS2-coated rings and balls proved superior in durability in a high-temperature vacuum environment. Compared with the hybrid bearings, the all-ceramic bearing was superior in both dynamic frictional torque and life.

Fourthly, they can be performed with poor lubrication. As ceramics are extremely hard and have outstanding wear resistance, they outperform other materials in bearing life without lubrication. According to a test, the steel bearing seized within a short period while the hybrid and all 627 Ceramic Bearings, though sustaining wear, did not. And the all-ceramic bearing sustained considerably less wear than the hybrid bearing, indicating that its endurance life is much longer.

Cermic Ball Bearing,Full Ceramic Bearing,Hybrid Ceramic Bearing,Self-Aligning Full Ceramic Ball Bearing

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