Precautions for fertilizing vegetables in protected areas

While applying the base fertilizer to the vegetable field, a large amount of topdressing should be carried out during the growth process, and the fertilization technique is one of the more common methods. It is recognized by the majority of farmers because of its convenient application, fast absorption and good fertilizer efficiency. However, pay attention to the following problems when applying: 1. Choose the correct type of fertilizer. Different types of fertilizers are water-soluble and have different effects. When selecting, they should be selected according to the growth of vegetables, the degree of lack of fertilizer, and the characteristics of fertilizers. If the vegetable has symptoms of nitrogen deficiency, urea, ammonium nitrate, etc. may be used. When nitrogen, phosphorus and potassium are present, potassium sulfate compound fertilizer may be used. 2, the application method should be appropriate. When applying fertilization, the solid fertilizer should be dissolved into water in advance to form a mother liquor, and then applied with water (the organic fertilizer should be sprayed about 10 days before the application of the organic fertilizer, and the supernatant is taken with water). When I went to the countryside, I found that many farmers' friends directly sprinkled fertilizers and watered them, causing uneven fertilization, local concentration was too high, and root burning occurred. 3, the amount of fertilizer should not be too large, the concentration should not be too high. When using the fertilizer, the amount of fertilizer should be reasonably mastered. Too much concentration may cause excessive concentration and fat damage. If the application of urea is too much, ammonia gas and nitrous acid gas poisoning are likely to occur, and too little begonia is less than top dressing. Generally speaking, when watering according to the normal watering amount, the application amount of the solid fertilizer can be applied at 120% of the conventional ground application amount (the special flushing fertilizer currently sold on the market can be carried out according to the instructions). 4. Don't ignore climate factors. Temperature, light, frost, etc. all have an impact on the benefits of fertilizer use, and this should be taken into account when applying. If the temperature is low, it will affect the absorption and transportation of fertilizers by crops, and the growth of vegetables will be inhibited. 5. Do not apply a single fertilizer. When I went to the countryside, I found that the peasant friend recognized a kind of fertilizer and regarded it as a universal fertilizer. Frequent use caused excessive nutrients and caused physiological diseases of vegetables. The correct method was based on the different growth of vegetables. During the developmental stage, balanced fertilization and alternating application of various fertilizers.

Lifting And Traction Winch

According to different methods of use, winches can be divided into four types: manual winches, electric winches, pneumatic winches, and hydraulic winches. At present, the largest marine hydraulic winch is 350T, and the weight of the equipment reaches 150T.
According to the reel form, it is divided into single reel and double reel.
According to the reel distribution, there are parallel double reels and front and rear double reels.
The main technical indicators of hydraulic winches include rated load, supporting load, rope speed, rope capacity, etc.
A winch is a light and small lifting device (see hoisting machinery) that uses a reel to wind a wire rope or chain to lift or tow heavy objects, also known as a hoist. The winch can be used alone or as a component of machinery such as lifting, road construction and mine hoisting. It is widely used because of its simple operation, large rope winding volume and convenient displacement. The winch is also known as the hoist. The product has high versatility, compact structure, small size, light weight, heavy lifting, and convenient transfer. It is widely used in construction, water conservancy projects, forestry, mines, docks, etc. for material lifting or flat towing, and can also be used as modern electronic control Supporting equipment for automatic operation line.
According to the power, the winch is divided into three categories: manual, electric and hydraulic.
The transmission mechanism of the handle rotation of the manual winch is equipped with a stopper (ratchet wheel and pawl), which can keep the heavy object in the required position. The manual winch used for assembling or lifting heavy objects should also be equipped with safety handles and brakes. Manual winches are generally used in places where the lifting capacity is small, the facilities are poor, or where there is no power supply.
Electric winches are widely used in places with heavy work and large traction requirements. The electric motor of the single-drum electric winch (pictured) drives the drum through the reducer, and a brake is installed between the electric motor and the input shaft of the reducer. In order to meet the needs of lifting, traction and rotation, there are also double-drum and multi-drum winches. Generally, a winch with a rated load lower than 10T can be designed as an electric winch.
The hydraulic winch is mainly a winch with a larger rated load. Generally, the winch from 10T to 5000T is designed as a hydraulic winch. The winch can be divided into:
Marine winches: Marine winches can be divided into drag winches, mooring winches, anchor winches, traction winches, etc.
Engineering winch: Mainly used in engineering, with functions such as hoisting and hoisting as the main function.
Mine winches: divided into hoisting winches, dispatching winches, shaft sinking winches, column return winches, rake mine winches, column return winches, etc.
Cable winch: mainly used when laying cables.

Lifting And Traction Winch,Pneumatic Winches,Hydraulic Winches,Electric Winches

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