How to rationally fertilize cucumber and tomato in greenhouse
2. According to the soil conditions, fertilization, such as the use of water with fertilizer, the amount of soil should be considered. The soil is drier, the concentration is lower, and the amount of topdressing is more. When the soil is wet, the concentration is higher and the amount of fertilizer used is less. Sandy soils have poor water retention and fertilizer retention capacity, and should be applied in small quantities. The viscous soil has strong water and fertilizer retention capacity, and the number of fertilization should be small, but the amount of fertilizer applied should be more.
3. Fertilization according to weather changes Because the temperature will affect the tolerance of the root system to the fertilizer concentration, when the temperature is high, the fertilization concentration should be low, otherwise it will easily burn root. When the temperature is low, the concentration is larger, so it should be fertilized according to weather changes.
4. According to different fertilizer types, different fertilization methods should be adopted. When applying fertilizer, it is better to adopt ditch application in order to concentrate fertilizer effect. After topdressing fertilizer, it is necessary to cover the soil in time to prevent nutrient volatilization and reduce fertilizer efficiency. When topdressing nitrogen fertilizer, it should be 10 cm away from plant roots. Outside, avoid burning roots. Combining irrigation with topdressing can improve fertilizer efficiency.
Generally, the amount of base fertilizer used for cucumber and tomato is roughly equal. The variety and quantity of fertilizer used for cucumber and tomato in an acre greenhouse are: 3000-4000 kg of rotted manure or 520-640 kg of avermectin organic fertilizer (use of avermectin organic fertilizer can no longer use chicken manure, Generally 40-50 kg avermectin organic fertilizer can replace 500-800 kg chicken manure), diammonium phosphate 40 kg, pure potassium sulfate 100 kg, urea 30 kg, Indian calcium fertilizer 4 kg, borax 3 kg, zinc sulfate 1.5 Kilograms, 40 kg of microbial agents. Sprinkle the above fertilizer into the surface of the ground. The microbial inoculant can be applied by ditch application or acupoint application, and concentrated use during transplanting.
Source: Qinghai Science and Technology News
Deep groove Ball Bearing is the most representative structure in rolling bearing, which is widely used. In addition to radial load, this kind of bearing can also be loaded with bidirectional axial load. The friction torque is small, and it is most suitable for adjusting rotation, low noise and low vibration. Bearings are widely used in automobile, electrical, instrumentation, construction machinery, agricultural machinery and various professional machinery. This kind of bearing has open and closed deformation structure. 
Deep groove ball bearings consist of an inner and outer ring with a cage containing a complement of precision balls. The standard Conrad-type bearing has a deep-groove construction capable of handling radial and axial loads from either direction in versatile designs that permit relatively high-speed operation.
Deep groove ball bearing is the most representative structure in rolling bearing, which is widely used. In addition to radial load, this kind of bearing can also be loaded with bidirectional axial load. The friction torque is small, and it is most suitable for adjusting rotation, low noise and low vibration. Bearings are widely used in automobile, electrical, instrumentation, construction machinery, agricultural machinery and various professional machinery. This kind of bearing has open and closed deformation structure.
Deep Groove Ball Bearing,Low Noise Deep Groove Ball Bearing,Wheel Deep Groove Ball Bearing,Flanged Deep Groove Ball Bearing
Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.lsjgbearing.com