Table 3 Composition and use of soil conditioners for different treatments.
From: Mechanisms of carbon and nitrogen distribution in soil aggregates in response to soil conditioners
Types of soil conditioners | Cow dung organic fertilizer soil conditioner | Humic Acid soil conditioner | Amino Acid (liquid) soil conditioner | |||
|---|---|---|---|---|---|---|
Treatment | Om-20% | Om-30% | Om-45% | Om-40% | Hu-20% | Am-25% |
Nutrient composition of soil conditioners | Organic matter ≥ 20% N + P2O5 + K2O≥4% pH 3 ~ 4 | Organic matter ≥ 30% N + P2O5 + K2O≥5% pH 4 ~ 6 | Organic matter ≥ 45% N + P2O5 + K2O≥5% pH 5 ~ 8.5 | Organic matter ≥ 40% N + P2O5 + K2O≥4% pH 5.5 ~ 8.5 | Organic matter≥ 20% Humic acid ≥ 25% pH 4 ~ 6 | Organic matter ≥ 25% Amino acid ≥ 20% Insoluble matter ≤ 10% pH 3.5 ~ 5 |
Recommended application rate (kg·ha− 2) | 1800 ~ 4500 | 3000 ~ 7500 | 3000 ~ 7500 | 3000 ~ 7500 | 3000 ~ 6000 | 300 ~ 450(Dilute 300 times) |
Actual application rate (kg·ha− 2) | 3000 | 4500 | 5000 | 5000 | 4500 | 350 |
Conditioner nutrient concentrations (kg ha− 2) | Organic matter ≥ 600 N + P2O5 + K2O≥120 (low) | Organic matter ≥ 1350 N + P2O5 + K2O≥225 (medium) | Organic matter ≥ 2250 N + P2O5 + K2O≥250 (high) | Organic matter ≥ 2000 N + P2O5 + K2O≥200 (high) | Organic matter ≥ 900 Humic acid ≥ 1125 (medium) | Organic matter ≥ 875 Amino acid ≥ 700 (medium) |
