After the beginning of spring, rape enters the vigorous period of vegetative growth and reproductive growth. It needs to absorb a lot of nutrients. Therefore, scientific fertilization should be carried out according to soil quality, climate and fertilization before spring, combined with seedling conditions. 1. Early spring fertilizer application in early spring can remedy the lack of winter growth of rapeseed, promote multi-branching and early budding. Especially for rapeseeds with insufficient base fertilizer and no wax fertilizer, supplementary topdressing in early spring is the key to high yield. Generally, 5-8 kg of urea or 10-15 kg of ammonium bicarbonate is used per mu. 2. Ingenious fertilization of rapeseed fertilization should be treated separately according to the appearance of rapeseed. For fields with weak seedlings and poor growth, reapply early, that is, when the height is about 50 cm, apply 15-20 palons of human excrement per mu, and add 5 kg of urea or 10-15 kg of 45% compound fertilizer. For fields with strong green leaves, the application of fertilizer should be delayed or less applied. 3. Foliar boron-sprayed rape is very sensitive to boron and requires a large amount. Insufficient boron supply in the soil often results in unfruitful rapeseed flowers. Rapeseed "flowers but not real" imagine that it is a physiological disease caused by boron deficiency. Applying boron fertilizer has a good yield increase effect. Apply boron to rapeseed after spring. Generally, spray once at the first flowering stage. Use 50-100 grams of borax per mu, first dissolve with hot water, and then spray 50-60 kg of water; the second spray of boron can combine with rape sclerotinia The prevention and control of oilseed rape are carried out at the same time, which can increase the yield of rapeseed. 4. Increased application of potassium fertilizer In order to improve the lodging resistance, disease resistance, and waterlogging resistance of rapeseed, the application of potassium fertilizer has obvious effects, especially for potassium-deficient soils such as sandy fields and rice fields. From late February to mid-March, it can be used for spraying with plant ash, about 150 kg per mu or 15 kg of potassium chloride. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
Steel Grating
The steel grating be welded to products . Normally, hot galvanizing will be carried out after end welding process. The range PH6 to PH12.5, a stable protective film will be formed on the zinc surface, the hot dipped galvanized steel grating has good anti-corrosive property. Of course, the steel grating also have other surface treatment, for example painted and powder coated .
Steel grating can be cutting to different kinds of shape as per your special needs.
Steel grating including flat grating, 'I' shape grating, serrated grating.
In generally , the steel grating be used as stair tread, platform, fence, trench cover, ceiling, etc.
The advantage of steel grating :
firm welding
smooth surface
high strength
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