Vegetable farmers often rush to ventilate their greenhouses right after watering, aiming to lower the humidity. However, this approach is actually not recommended. Instead of ventilating immediately, it's better to first raise the temperature inside the greenhouse before allowing air circulation. This is because the water used for irrigation is typically cooler than the surrounding environment, and it can lower the soil temperature. A drop in soil temperature can negatively affect the roots' ability to absorb water and nutrients, potentially damaging the fine root hairs and hindering the overall growth of the plants.
Once the soil warms up, ventilation becomes more effective. At this point, the air can hold more moisture, which helps in removing excess humidity from the greenhouse. This process also speeds up the recovery of the ground temperature, creating a more favorable environment for plant growth. Temperature plays a key role in moisture evaporation and air humidity levels. When temperatures are low, the air has less capacity to hold moisture, making it easier for humidity to reach saturation. In such conditions, ventilation alone may not be sufficient to reduce humidity effectively.
After watering, increasing the greenhouse temperature slightly won't harm the vegetables. In fact, it can help suppress many common diseases that thrive in cool, damp environments. For example, during winter and spring, fungal diseases like downy mildew are prevalent in greenhouses. These are considered low-temperature diseases, and higher temperatures can significantly reduce their occurrence. Many experienced farmers have successfully used this method to control disease outbreaks, proving that proper temperature management can be both beneficial and practical.
Therefore, it’s important for vegetable farmers to avoid immediate ventilation after watering. Instead, they should wait until the greenhouse temperature rises to around 33°C (the exact temperature may vary depending on the crop) before opening the vents. This strategy not only improves plant health but also helps maintain a more balanced and controlled growing environment.
Premix
The main differences between powder,premixed agent, granule are as follows:
Veterinary Soluble Powder: means a dry powder preparation made of one or more drugs by grinding and evenly mixing, with or without dressing.
Premix: refers to one or more drugs, and a suitable substrate evenly mixed to make a powder or granular preparation.
As a dosage form of feed drug additive, it is specially used for mixed feeding.
Powder powder, that is, powder, and premixed agent, the main differences of granules are as follows:
1.the production method is different
1.powder: medicine or with appropriate auxiliary materials by grinding, evenly mixed dry powder preparation.
2.Veterianary premix: powder or granular preparation made by evenly mixing the drug with an appropriate substrate.
3.granules: raw materials and appropriate excipients mixed into a certain particle size of dry granular preparation.
2.different characteristics
1. Dispersing agent: compared with other solid dosage forms, dispersing agent is easy to disperse, dissolves quickly, absorbs quickly and takes effect quickly; The preparation process is simple, the dosage is easy to control, and it is easy for infants to take.
2.Premix for animal: Premix used in the matrix including carrier, diluent, etc. The substrate should be stable, with good fluidity, and easy to mix with drugs and feed.
3. Granule: the dispersion, adhesion, agglomeration and hygroscopicity of granule are lower than that of granule; The separation of various components in granule is avoided because of the adhesive used to make granule after mixing. Convenient storage and transportation; Particles can change their function by coating.
Veterinary drug premix,Premix for animal,Veterinary premix,Poultry premix feed
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