2025/06/07
Definition:
Fertilizer produced by chemically combining nitrogen (N), phosphorus (P), and potassium (K) in specific ratios, with nutrients existing in compound forms.
Characteristics:
· Precise nutrient content with fixed ratios
· Uniform granules with good solubility
· Complex production process with higher costs
Best for: Large-scale grain crops (rice, wheat, corn) and cash crops (cotton, rapeseed), especially suitable for mechanized fertilization[1].
Definition:
Physical mixture of single-nutrient fertilizers (N, P, K) in specific proportions, with nutrients maintaining their original forms.
Characteristics:
· Flexible formulations that can be adjusted on-site
· Simple production process with lower costs
· Irregular granules with potential segregation
Best for: Small farms or specific crop needs, suitable for manual application, widely used in North American large farms[2].
Definition:
Carbon-containing materials derived primarily from plant and/or animal residues through decomposition and fermentation.
Characteristics:
· High organic matter content (≥30%)
· Comprehensive but low nutrient content
· Excellent for soil structure improvement
Best for: Protected agriculture, orchards, tea plantations, and organic farming, particularly suitable for soil amendment and fertility enhancement[3].
Definition:
Organic fertilizer enhanced with specific functional microorganisms, combining organic matter properties with microbial benefits.
Characteristics:
· Contains beneficial microorganisms (≥20 million/g)
· Combines nutrition and biological functions
· Requires advanced production techniques
Best for: Continuous cropping obstacle remediation, organic food production, saline-alkali soil improvement[4].
|
Fertilizer Type |
Nutrient Characteristics |
Primary Function |
Optimal Use Scenario |
|
NPK Compound |
High concentration, fixed ratio |
Rapid nutrition supply |
Large-scale grain production |
|
NPK Blended |
Medium-high concentration, flexible formula |
Targeted supplementation |
Custom fertilization for cash crops |
|
Organic |
Low concentration, comprehensive nutrients |
Soil improvement |
Protected agriculture and orchards |
|
Bio-organic |
Low concentration + microbes |
Soil ecosystem restoration |
Organic farming and soil remediation |
Modern agricultural practices often require combined use of these fertilizers:
· Base fertilizer stage: Organic/bio-organic fertilizer + partial compound fertilizer
· Topdressing stage: Compound or blended fertilizer
· Soil amendment: Prioritize bio-organic fertilizer
· Precision fertilization: Select appropriate blended fertilizer based on soil test results
References:
[1] International Fertilizer Association (IFA). Compound Fertilizer Production Guide. 2022
[2] USDA. Blended Fertilizer Application Manual. 2021
[3] NY 525-2021 Organic Fertilizer Industry Standard
[4] Ministry of Agriculture. Bio-organic Fertilizer Promotion Guidelines. 2023