I. What is Nitro Compound Fertilizer
Nitro Compound Fertilizer uses ammonium nitrate as the nitrogen source, adding phosphorus, potassium and other compound fertilizer raw materials to produce N , P, K high concentration compound fertilizer. Its products contain both nitrate nitrogen and ammonium nitrogen. The main products are ammonium nitrate, phosphorus and potassium nitrate.
Second, the use of nitro compound fertilizer
Nitro compound fertilizer is an important agricultural fertilizer, mainly suitable for tobacco, corn, fruits, vegetables, Fruit trees and other economic crops, as well as alkaline soil and karst landform areas, the application effect is better than urea in alkaline soil and karst landform areas.
Third, the characteristics of nitro compound fertilizer
1. Rapid onset: It can quickly promote crop growth and take effect within 3 days.
2. Significant yield increase: the fertilizer utilization rate is high. Compared with the application of the same amount of elemental nitrogen fertilizer, the yield is increased by 8-25%.
3. Quality optimization: It can significantly increase the protein, soluble sugar and vitamin content of agricultural products, and improve the color and taste.
4. Drought-resistant and water-retaining: enhance the drought-resistant and water-retaining capacity of crops, and increase the yield of dry land.
5. Activated soil: resist soil compaction and effectively improve soil condition.
Four. Nitro compound fertilizer application method
1. As base fertilizer
Nitrogen used in dry fields When the base compound fertilizer is used as the base fertilizer, it must be deeply covered with soil to reduce the crystal fixation of potassium, and facilitate the absorption of crop roots and improve the utilization rate.
2. Top dressing
Due to the low mobility of potassium in the soil, it should be applied in strips or in holes to the soil layer with denser roots, and Promote absorption.
V. Taboo on the use of nitro compound fertilizers
1. Because nitrate nitrogen is very soluble in water and easy to run off, it is not suitable for paddy fields and rainy areas in the south Regional use; it is not advisable to apply before and after heavy rain in dry land or to water heavily after application.
2. Nitrate nitrogen fertilizer should not be mixed with organic fertilizer. Organic fertilizers contain more organic matter, and in the presence of nitrate nitrogen fertilizers, nitrification will occur under the action of denitrifying bacteria, resulting in loss of nitrogen.
3. Nitrate nitrogen fertilizer should not be applied in paddy fields. Nitrate is lost with water, reducing fertilizer efficiency. Nitrate nitrogen fertilizer is easily decomposed by denitrifying bacteria under anaerobic conditions, resulting in nitrogen loss.
4. Due to the good solubility of nitro compound fertilizer, it is easy to cause the salt concentration in the soil solution to be too high, causing the phenomenon of burning seeds and seedlings. Pay attention to the isolation of seed fertilizers when using them.
5. Apply nitrosulfur-based compound fertilizer on fruit trees and vegetables.
6. When applying (furrow application) on fruit trees, pay attention to one layer of soil and one layer of fertilizer, and mix the soil and fertilizer evenly; when applying it to vegetable crops in greenhouses, apply it once every 15 days, and the dosage should not exceed 30 -40 catties/mu.
7. The nitro compound fertilizer should generally be stopped 20 days before the crop is harvested to avoid excessive nitrite in the crop.
