Some farmers who refused to apply the seedlings and fertilizers were only applied to the farmer's fertilizer for seedlings two months after the transplanting of the rapeseed. In fact, at this time, rapeseed is need to absorb more nutrients, such as nutrition can not keep up, it will affect the growth of rapeseed, and even cause deadlock. To this end, in the transplanting of rapeseed, it is necessary to use the dilute excrement as a fixed root water; after living the tree, use 250-500 kilograms of human excrement per acre, and 2 to 3 kilograms of urea, and add water to fertilize it to benefit the strong seedlings.
Avoid using boron fertilizer. The application of rapeseed is sensitive to the reaction of boron fertilizer. Boron deficiency can cause physiological diseases, leading to poor root development, only flowering is not strong or the seeds are not full. Generally, 0.2-0.3 kg of borax is used as the base fertilizer per acre. At the same time, in the rapeseed seedling stage, the bud stage, and the flowering stage, the boron fertilizer is sprayed once, and each time 50 grams of borax is added with 50 kg of water and sprayed.
Fused Silica Round Plano-convex Cylindrical Lenses
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Our company can produce a variety of specifications, radius, different base material of flat convex cylindrical mirror, flat concave cylindrical mirror, double convex cylindrical mirror, double concave cylindrical mirror, crescent cylindrical mirror and other ordinary cylindrical mirror.
Special cylindrical mirror can also be processed, such as: achromatic cylindrical mirror, parabolic cylindrical mirror, cylindrical ellipsoid and hyperboloid cylindrical mirror, such as aspheric surface cylindrical mirror and cylindrical mirror group.
Materials: optical glasses such as flint glass, ultraviolet fused quartz and infrared fused quartz, as well as optical crystal materials such as calcium fluoride (CaF2), germanium (Ge), Zinc selenide (ZnSe) and silicon (Si)
Focal length: ±5mm -- ±1000mm±1%(TIROPTICS OPTOMATIC2000 test in Germany)
Length: 2 mm - 300 mm + / - 0.1 mm
Width: 2 mm - 150 mm + / - 0.1 mm
Center thickness tolerance: ±0.2mm
Center deviation: 3-5 points
Surface accuracy: /2
Surface quality: 60/40
Effective diameter: 90%
Plating film: according to customer requirements can be coated
In addition, we have more than a thousand kinds of standard products, and some of the standard products in stock to meet your needs
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Gold Dragon Optics Electronic Technology CO.,Ltd , https://www.golddragon-optics.com