The use of greenhouse flushing fertilization is an important link in improving crop yield and quality in greenhouse agriculture. The following is a detailed usage method for greenhouse fertilization: 1. Understand crop needs
Nutritional requirements: Different crops have varying nutrient needs, so it is necessary to determine the type and amount of fertilization based on specific crop types and growth stages.
Growth stage: Crops have different nutrient requirements at different growth stages. For example, leafy vegetables require more nitrogen, while leguminous and solanaceous crops require more phosphorus and potassium. 2、 Choose the appropriate fertilizer
Types of fertilizers: Common fertilizers include organic fertilizers, chemical fertilizers, and microbial fertilizers. Organic fertilizers have the advantages of maintaining soil moisture, improving soil structure, and enhancing soil fertility; Fertilizer can quickly provide the nutrients needed by crops; Microbial fertilizers can promote soil microbial activity and improve soil fertility.
Attention: Pay attention to choosing fertilizers with good water solubility so that they can be quickly absorbed by crops when applied with water. 3、 Determine the timing of fertilization
Early growth stage and rapid growth stage: These two stages are critical for crop nutrient demand and are crucial for fertilization.
Soil nutrient situation: Determine the timing of fertilization based on the supply of soil nutrients to avoid blind fertilization. 4、 Methods of flushing and fertilizing
1. The integrated method of water and fertilizer dissolves fertilizers in irrigation water and applies them through the irrigation system. This method is suitable for large-scale greenhouse agriculture and can achieve uniform application of fertilizers. Advantages: Uniform fertilization, saving manpower and material resources.
2. The cultivation soil mixing method mixes fertilizer and cultivation soil evenly before applying it to the greenhouse. This method is suitable for small-scale greenhouse agriculture and can improve the utilization rate of fertilizers. Advantages: High fertilizer utilization rate, suitable for small-scale planting.
3. Foliar spraying method dissolves fertilizer in water and sprays it through the leaves. This method is suitable for supplementing crops when they lack certain specific nutrients. Advantages: Quickly replenish nutrients, suitable for emergency use. 5、 Precautions
1. Control the amount and frequency of fertilization, follow the principles of fertilization amount and frequency, and avoid excessive fertilization to avoid soil pollution and crop growth obstacles. Using a small amount of fertilizer multiple times is beneficial for crops to continuously absorb nutrients.
2. During the fertilization process, it is important to protect oneself by avoiding direct contact with fertilizers and using protective measures such as wearing masks and gloves.
3. Regularly monitor the content of soil nutrients and adjust the fertilization plan based on the monitoring results to ensure the growth and development of crops.
4. For some shallow rooted leafy vegetables or crops that are inconvenient for topdressing operations, the fertilization method can be carried out by flushing with water, but the water amount should be controlled to promote uniform distribution of nutrients. For some deep rooted crops such as cucumbers, tomatoes, and fruit trees, furrow or hole application should be carried out to improve fertilizer utilization and reduce damage to the root system.
5. Avoid mixing and applying several fertilizers, otherwise the effect will decrease or even be ineffective. Ammonium bicarbonate cannot be mixed and mixed with strong acidic fertilizers, and amino acid fertilizers cannot be mixed and mixed with humic acid fertilizers.
The use of greenhouse fertilization requires comprehensive consideration of crop demand, fertilizer selection, timing and methods of fertilization, as well as precautions. Only through scientific and rational fertilization can sustainable development of agriculture be achieved, and the quality and yield of agricultural products be improved.