In the early stage of growth of rapeseed transplanted seedlings, there may be a phenomenon of redness and yellowing of leaves, curling of leaf core, slow growth or stop growth, and poor growth and development. So how to prevent the rape seed from appearing dead? China Pesticide Network Xiaobian gives you the trick:
Stiffness caused by drought or waterlogging. The drought caused by drought or waterlogging not only causes the plants to lack water, but also suffers from symptoms such as redness and purpleness. Field investigation, soil surface whitening hardening, and even cracking, the plant may have wilting phenomenon at noon on sunny days; for drought and dead seedlings, it is no-tillage transplanting, can use the method of furrow irrigation, watering to 2/3 of the ditch depth, allowing water to penetrate Infiltrating the soil; spraying new high-fat film in time after transplanting can effectively prevent the ground water from evaporating, the seed water is not transpiration, isolate pests and diseases, shorten the slow seedling period, quickly adapt to the new environment, and grow healthily. For the dead seedlings caused by waterlogging, it is necessary to dredge or deepen the drainage ditch to lower the water table. Combined with cultivating, applying ash or decomposed sorghum (heap) fertilizer to increase soil temperature.
Stiffness caused by soil compaction. To do a good job of cultivating, the pesticide network recommends spraying a new high-fat film 600 times liquid, protecting the water-proof evaporation, sun-proof and drought-resistant, heat-preserving anti-freezing, anti-soil layering, suffocation and isolation of pests and diseases.
Dead seedlings caused by lack of fertilizer. The dead plants caused by lack of fertilizer are short, the leaves are narrow, the leaves are yellow-green, and the leaves at the base of the stem are red when it is severe, indicating that the plants are deficient in nitrogen, and the quick-acting nitrogen fertilizer should be applied in time; if the upper leaves are dark green and dull, the lower leaves are purple-red. The leaves are slow and the roots are stunted, which is the symptom of phosphorus deficiency. This can be sprayed with 0.3% potassium dihydrogen phosphate solution 2 to 3 times, once every 3 to 5 days. It may also be due to the scarring caused by boron deficiency, which is characterized by slow growth of plants, severe roots and dead hearts, and purple leaves. In this regard, it can be sprayed with a new high-fat film + 0.1% borax solution 30-40 kg of foliar surface.
Deadlock caused by pests and diseases. The dead seedlings caused by pests and diseases can cause the plants to shrink and cause viral diseases. In this regard, it is necessary to strictly prevent the locust hazard, and when it is found that there is a local aphid hazard, the pesticide manufacturer recommends using a new high-fat film + 100% sputum spray; if the virus disease symptoms are found, it is necessary to use the new high-fat film + 5% bactericidal clear 300-400 in time. Double liquid spray control.
A flange can also be a plate or ring to form a rim at the end of a pipe when fastened to the pipe. A blind flange is a plate for covering or closing the end of a pipe. A flange joint is a connection of pipes, where the connecting pieces have flanges by which the parts are bolted together.
Although the word flange generally refers to the actual raised rim or lip of a fitting, many flanged plumbing fittings are themselves known as 'flanges':
There are many different flange standards to be found worldwide. To allow easy functionality and interchangeability, these are designed to have standardised dimensions. Common world standards include ASA/ASME (USA), PN/DIN (European), BS10 (British/Australian), and JIS/KS (Japanese/Korean). In the USA, ANSI stopped publishing B16.5 in 1996, and the standard is ASME B16.5
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