Linyi Fertilizer Network Copyright
The main problem of winter vegetable production and fertilization in solar greenhouses is that the demand for nutrients in crops and the low soil temperature lead to slow decomposition of fertilizers. In order to alleviate this contradiction, accelerate the growth and development of winter vegetables, and fertilize vegetables in winter greenhouses. The following principles should be mastered: Linyi Fertilizer Network Co., Ltd.
Linyi Fertilizer Network Copyright
1, early application of base fertilizer. The production of winter and spring vegetables in the solar greenhouse should be completed in advance by mid-to-late September. Apply 0.5 to 10,000 kilograms of decomposed organic fertilizer per acre, then deepen 30 centimeters, and apply organic fertilizer to the soil early. When the soil is prepared, the manure will be mixed. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
2, clever application of "fixed plant" fertilizer. From late October to mid-November, when the fruit vegetables are planted, diammonium phosphate and urea are applied to each of the two planting ridges to open a ditch of about 15 cm to 20 cm deep. 30 kg of diammonium phosphate per acre, 15 kg to 20 kg of urea, while water is poured into the ditch, and then the soil ditch ridges. When planting the seedlings, a small amount of phosphorus diammonium is applied as a "mouth fertilizer" every two plants, about 40 kg per mu. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
3. Promote the use of ammonium sulfate as a top dressing. In winter, topdressing and urea are used. Because of the low soil temperature, the nutrient decomposition of urea is slow, so the fertilizer efficiency is slow. Although the use of ammonium bicarbonate is quick, the ammonia is volatilized in the ammonium carbonate in the closed environment of the greenhouse. Ammonium sulfate can overcome the shortcomings of the above two kinds of chemical fertilizers. Therefore, in winter, topdressing is best for applying 20 kg to 30 kg of ammonium sulfate per acre. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
4. It is recommended to apply bio-organic and inorganic compound fertilizer. Bio-organic compound fertilizer contains trace elements that promote nutrient decomposition. It is used as the base fertilizer, the nutrient is comprehensive, the fertility is lasting, and the fertilizer effect is fast; using it as a top dressing, not only the fertilizer effect is fast, but also the fertilized organic fertilizer, so it is an ideal compound fertilizer for the vegetable field soil. 120 kg per mu is used as the base fertilizer. When the vegetables are planted, they are applied or ditched; 40 kg per mu is used as top dressing, shallow ditch is applied, and the soil is filled after burying. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
5, the method of topdressing: winter topdressing, the fertilizer should be dissolved in the water before, and then combined with irrigation, the fertilizer water into the irrigation ditch. Generally, every time the water is cleaned, the fertilizer water is poured once. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
6, after the harsh winter, heavy topdressing. Low temperature, low light, and slow vegetable production in winter. In order to make up for the consumption of crops during the winter season, lay the foundation for the increase of production after the spring, the winter and spring hazelnuts, especially the winter and spring melons, should be topdressed once from the end of January to the beginning of February. Use 1500 kg of decomposed organic fertilizer per acre and add 20 kg to 30 kg of diammonium phosphate. After the shallow ditch is applied, the soil is buried. At this time, it is also recommended to use 4 kg to 6 kg of potassium dihydrogen phosphate per acre, and the soil is topdressed with phosphorus and potassium fertilizer with irrigation. Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
Linyi Fertilizer Network Copyright
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Ball Cock
A ballcock (also balltap or float valve) is a mechanism or machine for filling water tanks, such as those found in flush toilets, while avoiding overflow and (in the event of low water pressure) backflow. The modern ballcock was invented by José Antonio de Alzate y RamÃrez, a Mexican priest and scientist, who described the device in 1790 in the Gaceta de Literatura Méxicana.[1] It consists of a valve connected to a hollow sealed float by means of a lever, mounted near the top of the tank. The float is often ball-shaped, hence the name ballcock. The valve is connected to the incoming water supply, and is opened and closed by the lever which has the float mounted on the end. When the water level rises, the float rises with it; once it rises to a pre-set level, the mechanism forces the lever to close the valve and shut off the water flow. This is an example of negative feedback and of proportional control.
Ball Cock, Brass Ball Bibcock, Ballcock Valve, Toilet Ballcock Valve
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