Greenhouse vegetable cultivation demands precise and careful fertilization. Improper application not only leads to soil compaction, which can harm the plants, but also causes excessive levels of nitrates and nitrites in the vegetables—substances that are harmful to human health. Therefore, it is crucial to apply chemical fertilizers with caution and adopt scientific fertilization practices.
To achieve this, increasing the use of organic fertilizer is highly recommended. Organic fertilizers provide a complete range of nutrients, have a long-lasting effect, and improve soil structure while enhancing vegetable quality. For every mu of greenhouse land, at least 3 cubic meters of organic fertilizer should be applied.
While nitrogen fertilizers are essential in greenhouse farming, they must be used in moderation. Phosphorus and potassium, on the other hand, play a vital role in plant growth by participating in various biochemical processes and activating over 60 enzymes, which significantly boosts the plant’s resistance to stress. These should be applied more frequently. Additionally, managing the ventilation of greenhouses by opening windows more often can increase light intensity, helping to reduce nitrate accumulation in vegetables.
Certain chemical nitrogen fertilizers should be banned or restricted. For instance, nitrate-based fertilizers like ammonium nitrate and potassium nitrate should be avoided to prevent nitrate buildup in crops. Chlorinated fertilizers such as potassium chloride and ammonium chloride are also unsuitable, as they can lower starch content, reduce yield, and cause soil degradation. Similarly, the use of magnesium sulfate and ammonium sulfate should be limited due to their sulfate ions, which may remain in the soil and hinder plant growth. Ammonium bicarbonate should also be used sparingly because of its tendency to release ammonia, which can be toxic to plants.
Soil testing and balanced fertilization are essential for sustainable greenhouse farming. Vegetable-specific compound fertilizers, developed based on the unique nutrient needs of different crops and soil conditions, offer a more scientific and effective approach. These fertilizers provide well-rounded nutrition, leading to better yields and improved vegetable quality.
New types of fertilizers, such as those containing zinc, molybdenum, calcium, and magnesium, should be promoted. These micronutrients enhance vegetable quality and are essential for healthy plant development.
Bio-fertilizers, especially bio-organic compound fertilizers, are highly beneficial. These products combine organic matter, inorganic nutrients, beneficial microorganisms, and synergists to create a balanced and efficient fertilizer. They improve soil structure, increase fertility, and support a healthier growing environment for greenhouse vegetables.
Lastly, while some plant hormones like gibberellin (920), ethephon, and paclobutrazol can enhance vegetable quality, they should be used sparingly due to potential health risks. Their application should be strictly controlled to ensure safety.
Omega-3 Fish Oil,Fish Oil 10/50 Tg,Omega 3 Fish Oil,10/50 Tg Fish Oil
ZHOUSHAN SINOMEGA BIOTECH ENGINEERING CO.,LTD , https://www.sinomegabiotech.com