Fertilization of greenhouse cucumbers is "exquisite"
Cucumber fertilizer reference
1 to 3 years solar greenhouse
(1) Target production: 12,000-13,000 kg/mu.
(2) Total fertilization: organic fertilizer (chicken manure or high quality circle fertilizer) 12-15 square meters/mu. Fertilizer: 60-80 kg of urea + 150-160 kg of diammonium phosphate + 100-120 kg/mu of potassium chloride. Or NPK compound fertilizer (15 ~ 15 ~ 15) 300 ~ 350 kg + 200 kg of superphosphate + urea 40 ~ 50 kg / mu.
(3) Fertilization method: base application (pre-planting) all organic fertilizer + diammonium phosphate 70 ~ 80 kg + potassium chloride 30 ~ 40 kg / mu. Or organic fertilizer + NPK compound fertilizer 70 ~ 90 kg + calcium superphosphate 200 kg + potassium chloride 10 ~ 20 kg / mu.
Follow-up from November to February every 4 to 5 weeks, each application of urea 6-8 kg + diammonium phosphate 5 ~ 10 kg + potassium chloride 3 ~ 5 kg / mu. Or NPK compound fertilizer (15 ~ 15 ~ 15) 25 ~ 30 kg + urea 3 ~ 5 kg / mu. Every 3 to 3 weeks from March to May, each application of urea 15-20 kg + diammonium phosphate 10-20 kg + potassium chloride 5 ~ 10 kg / mu or NPK compound fertilizer (15 ~ 15 ~) 15) 30 ~ 40 kg + urea 3 ~ 5 kg / mu.
5-6 years solar greenhouse
(1) Target production: 13,000-~15,000 kg/mu.
(2) Total fertilization: organic fertilizer (chicken manure or high quality ring fertilizer) 12 to 16 square meters/mu. Fertilizer: 60-80 kg of urea + 160-170 kg of diammonium phosphate + 110-120 kg/mu of potassium chloride. Or NPK compound fertilizer (15 ~ 15 ~ 15) 300 ~ 360 kg + superphosphate 220 kg + urea 45 ~ 55 kg / mu.
(3) Fertilization method: base application (pre-planting) all organic fertilizer + diammonium phosphate 75 ~ 85 kg + potassium chloride 40 ~ 50 kg / mu. Or organic fertilizer + NPK compound fertilizer 90 ~ 100 kg + superphosphate 220 kg + potassium chloride 10 ~ 20 kg / mu.
Follow-up from November to February every 4 to 5 weeks, each application of urea 6-8 kg + diammonium phosphate 5 ~ 10 kg + potassium chloride 3 ~ 5 kg / mu. Or NPK compound fertilizer (15 ~ 15 ~ 15) 25 ~ 30 kg + urea 3 ~ 5 kg / mu. Every 3 to 3 weeks from March to May, each application of urea 15-20 kg + diammonium phosphate 10-20 kg + potassium chloride 5 ~ 10 kg / mu. Or NPK fertilizer (15 ~ 15 ~ 15) 30 ~ 40 kg + urea 3 ~ 5 kg / mu.
7 to 10 years solar greenhouse
(1) Target production: 11,000 to 13,000 kg/mu.
(2) Total fertilization: organic fertilizer (chicken manure or high quality ring fertilizer) 11 to 14 square meters/mu. Fertilizer: 60-70 kg of urea + 140-160 kg of diammonium phosphate + 100-120 kg/mu of potassium chloride. Or NPK compound fertilizer (15 ~ 15 ~ 15) 300 ~ 380 kg + 200 kg of superphosphate + urea 35 ~ 50 kg / mu.
(3) Fertilization method: base application (sowing before planting) all organic fertilizer + diammonium phosphate 70 ~ 80 kg + potassium chloride 35 ~ 45 kg / mu. Or organic fertilizer + NPK compound fertilizer 90 ~ 100 kg + calcium superphosphate 200 kg + potassium chloride 10 ~ 15 kg / mu.
Follow-up from November to February every 4 to 5 weeks, apply 5-5 kg ​​of urea per fertilizer + 5-10 kg of diammonium phosphate + 3-5 kg/mu of potassium chloride. Or NPK fertilizer (15 ~ 15 ~ 15) 20 ~ 25 kg + urea 5 ~ 7 kg / mu. Every 3 to 3 weeks from March to May, each application of urea 10-20 kg + diammonium phosphate 15-20 kg + potassium chloride 8 ~ 10 kg / mu. Or NPK compound fertilizer (15 ~ 15 ~ 15) 35 ~ 45 kg + urea 5 ~ 8 kg / mu.
Plane ruled gratings are characterized by a superior efficiency at their design wavelength compared with holographic gratings. Plane Ruled gratings comprise the majority of diffraction gratings used in spectroscopic instrumentation and are especially useful in systems requiring high resolution.
China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300 x 300 mm for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Plane Ruled Grating,Plane Ruled Diffraction Grating,Plane Reflection Grating,Plane Ruled Reflective Grating
China Star Optics Technology Co.,Ltd. , https://www.csoptlens.com