Small stone series
The sandwich panel is lightweight, and its characteristics of high level of compressive property, good shock resistance, strong integrity after anchoring, which makes it possible to eliminate the earthquake damage to buildings. Flame retardant and fire resistant ,Waterproof, Damp-proof and Anti-leaking. Sound insulation and Noise reduction
Metal Wall Decorative Panel,Pu Foamed Wall Decorative Panel,Composite Decorative Panel,Polyurethane Composite Decorative Panel Jinan Zhengtang Insulation Decoration Material Co.Ltd , https://www.ztwallsiding.com
Polyurethane /pu foam sandwich panel(exterior/interior wall panel) can be used on any structural buildings ,brick wall, Steel structure, cement wall,wood wall etc for decoration and insulation.
The Core material Hard PU foam inside is independent and consists of a closed bubble structure that is perfectly even, so it has good sound effect and provides you with a quiet and comfortable environment even in noisy areas. Easy and quick installation.Strong Decorative effects and Eco-friendly.
Quantitative fertilization technology for field crops
Quantitative fertilization technology mainly includes two aspects. One is to adjust the proportion of nutrients such as nitrogen, phosphorus and potassium to become balanced fertilization. The other is to cooperate with different fertilizers to regulate the proportion of nutrient supply during the growth period, which is called fertilization package. The nitrogen, phosphorus and potassium fertilizers required for field crops are nitrogen (n) 10-15 kg per mu, phosphorus (p2o5) is about half of nitrogen fertilizer, and potassium (k2o) amount is between nitrogen application rate and phosphorus application rate. In the north, the amount of nitrogen applied is close to that in the south. Field crops have a short growth period. Generally, phosphorus and potassium fertilizers, especially phosphate fertilizers, are applied as a base fertilizer at one time, 30%-70% of nitrogen fertilizer (mostly 50%) as a base fertilizer, and the remaining nitrogen fertilizers are mainly used for top dressing in crop rapid growth period. . The base fertilizer can be applied with nitrogen, phosphorus and potassium compound fertilizers, or nitrogen, phosphorus and potassium fertilizers can be combined.
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