Dehydration-type fertilizer is mainly caused by excessive application of chemical fertilizer at one time, or insufficient soil moisture, and the concentration of fertilizer solution in the soil is too large after fertilization, causing reverse osmosis of water in crop cells, resulting in dehydration of crops. Fertilized plants show wilting, like frost or boiling water. Lightness affects growth and development, and heavy plants die.
The smog-type fertilizer is mainly applied with ammonia, bicarbonate and other fertilizers. Such fertilizers are applied at high temperatures, which are prone to produce a large amount of ammonia gas, causing damage to crops, and lighter yellowing of the lower tip, affecting growth and development. The heavy ones caused the whole plant to die.
Burning type fertilizers Apply too much amount of seed fertilizer, or use superphosphate, or use alkaline volatile ammonium bicarbonate and urea, lime nitrogen and other chemical fertilizers to dress, often burning, resulting in lack of seedlings. In addition, when foliar fertilization is applied, the concentration used is too large, which may cause leaf burns.
Toxic fertilizers Some fertilizers, such as lime nitrogen, are toxic fertilizers that, after being applied to the soil, undergo a series of transformations to be absorbed by plants, but some toxic substances are produced during the conversion process to poison crops, causing them to be killed or killed. Therefore, the application amount should be strictly controlled when applying fertilizer, and the fertilizer should be used safely and rationally.
Author: Cai Hongxia
Source: Farmers Daily
Screen spline is a vital component in the construction and maintenance of window screens and screen doors. It serves the crucial purpose of securing the screen material firmly in place within the frame, ensuring a tight and durable fit. Made from flexible materials such as rubber or vinyl, screen spline is designed to be inserted into a groove or channel along the edges of the frame, holding the screen securely and preventing it from sagging or coming loose.
The primary function of screen spline is to create a tight seal between the screen material and the frame, effectively keeping out insects, bugs, and debris while allowing fresh air to flow through. By securely holding the screen material in place, it prevents gaps or openings that could compromise the effectiveness of the screen in providing protection and ventilation.
Screen spline also plays a crucial role in maintaining the structural integrity of the screen. It helps distribute tension evenly across the screen material, preventing it from stretching or warping over time. This ensures that the screen remains taut and free from wrinkles or sagging, enhancing its appearance and functionality.
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Whether for residential or commercial use, screen spline is an essential component in the construction and maintenance of window screens and screen doors. Its purpose of securely holding the screen material in place, providing protection against insects and debris, and maintaining the structural integrity of the screen makes it an indispensable part of any screen installation. With its functionality and versatility, screen spline ensures that windows and screen doors can effectively fulfill their intended purpose of providing ventilation, protection, and comfort.
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