| Autor: |
Lumbanraja, Jamalam, Agustina, Wiwik, Sarno, Utomo, Muhajir, Hasibuan, Rosma, Lumbanraja, Favorisen. R. |
| Předmět: |
|
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 2970 Issue 1, p1-10, 10p |
| Abstrakt: |
Combination of organic and inorganic fertilizers plays an important role in increasing soil productivity of sugarcane. An experiment consisting of five treatments: 100% NPK; 100% organic fertilizer; 100% NPK + 50% organic fertilizer; 50% NPK + 100% organic fertilizer, and no fertilizer were conducted to determine sugarcane production, harvested potassium (K) and K exchange behaviour in Ultisol soil. Potassium exchange behaviour was determined by employing Quantity-Intensity (Q/I) method to find out the correlation between the Q/I parameters and the K availability. The results indicated that giving a combination of 100% NPK and 50% organic fertilizer had the highest yield of sugarcane biomass, total nutrient uptake of sugarcane. The highest value of Q/I parameters such as the potential buffering capacity of K (PBCK) and the selectivity coefficient of K (Kv) were found in the treatment 100% organic fertilizer but not significant different from no fertilizer treatment. However, when the soil was treated with inorganic fertilizer, the PBCK and Kv were very low meaning that the K can be leached down during the rainy season. There were highly significant positive correlations between ExKL and ExK versus harvested K indicating that sugarcane production was heavily rely on labile adsorbed K from soil. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
