Shading Net Cultivation
Shading net cultivation is an effective method to improve the growing environment of crops during the hot summer and autumn seasons. It helps reduce the impact of rain, control temperature, and create a more stable growth condition for plants. In addition to shading, these nets also provide protection against pests, diseases, moisture retention, and drought. The most common colors are black and silver-gray, with a shading rate typically ranging from 45% to 65%. Black shade nets are widely used in production, while silver-gray nets are preferred in certain cases to prevent and reduce virus transmission. These nets are especially beneficial for seedling nurseries of vegetables like cauliflower, broccoli, celery, and early Chinese cabbage in August, significantly improving seedling survival rates and quality. For solanaceous crops, they help reduce glare and high temperatures, which can extend flowering periods and increase yields. During the summer and autumn heat, using shading nets for autumn crops such as pakchoi, tomatoes, cucumbers, and early celery allows for earlier planting and higher productivity.
Micro Sprinkler Irrigation Technology
Micro sprinkler irrigation is a modern and efficient irrigation technique that sprays fine water droplets evenly over a small area. It has a low spray volume and gentle impact, making it ideal for dense crops and tender plants like Chinese cabbage and celery, including seedlings. This technology not only saves water and labor but also improves the microclimate in the field by regulating soil moisture, nutrients, air, and temperature. It provides cooling and humidification effects during high-temperature periods, serving as an effective measure for disaster prevention during the hot and dry summer and autumn seasons. It is commonly applied to crops such as Chinese cabbage, small green vegetables, edible fungi, and early celery, significantly enhancing yield, quality, and the proportion of high-quality products.
Integrated Pest Control
During the high-temperature season, pests such as Plutella xylostella, Pieris rapae, and Spodoptera litura become more active. Several technical measures can be implemented to manage them effectively.
Insect Net Isolation Technology: Using insect-proof nets with a 22-mesh density, especially silver-gray ones, can effectively prevent pests like Plutella xylostella, Spodoptera litura, Pieris rapae, and aphids, reducing the need for chemical pesticides. This is a key technique for producing pollution-free vegetables. Key application points include: tilling the soil before covering the net to kill underground pests, ensuring the edges of the net are tightly sealed to prevent pests from entering, treating the soil with Loessben before planting to eliminate remaining pests and eggs, regularly inspecting and removing egg masses on the net, and using shading and irrigation to manage temperature inside the greenhouse during extreme weather.
Sex Pheromone Traps, Sticky Swatches, and Insecticidal Lamps: These tools are highly effective in controlling pest populations, reducing their numbers, and minimizing the need for pesticide applications.
Chemical Control: When using pesticides, it's important to follow safety guidelines. If possible, biological or high-efficiency, low-toxicity, and low-residue pesticides should be used. Examples of biological pesticides include avermectin, while options like imidacloprid and pyrethroid pesticides are considered safer alternatives. Strict adherence to the safety interval is essential to ensure the health of both crops and consumers.
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Iron Investment Casting
Iron Investment Casting, also known as iron lost wax casting or ferrous investment casting, is a manufacturing process that involves pouring molten iron into a mould made from a wax pattern. The wax pattern is created by injecting molten wax into a mould cavity formed around a pattern of the desired part. Once the wax pattern is coated with ceramic material and dried, it is heated to melt and remove the wax, leaving a cavity in the shape of the desired part. Molten iron is then poured into the cavity and allowed to solidify, creating a final iron casting with intricate details and high dimensional accuracy.
The materials commonly used in iron investment casting include various grades of iron, such as grey iron, ductile iron, and alloyed iron. Grey iron, known for its high carbon content and graphite flakes, offers good machinability and damping capacity, making it suitable for applications requiring vibration absorption. Ductile iron, also known as nodular iron or spheroidal graphite iron, exhibits enhanced strength, ductility, and wear resistance compared to grey iron, making it ideal for components subjected to high stress and impact loads. Alloyed iron, which incorporates alloying elements such as chromium, nickel, and molybdenum, offers improved mechanical properties and corrosion resistance, expanding its application range in demanding environments.
Overall, iron investment casting provides manufacturers with the flexibility to produce complex iron components with precise dimensions and superior surface finish, making it a preferred choice for various industries, including automotive, aerospace, machinery, and infrastructure.
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Taiyuan Simis Investment Casting Co., Ltd , https://www.precision-casting.biz