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Significant Effects of Long-Term Application of Straw and Manure Combined with NPK Fertilizers on Olsen P and PAC in Red Soil.
- Source :
-
Agronomy . Jun2023, Vol. 13 Issue 6, p1647. 15p. - Publication Year :
- 2023
-
Abstract
- The application of manure (M) and straw (S) will increase the Olsen P and phosphorus activation coefficient (PAC) in soil. Clarifying the increasing trend of Olsen P and PAC is crucial for rational fertilization. This study fitted the equation between the accumulated P surplus, Olsen P, and PAC in four treatments for 28 years and analyzed the changes and rates of P fractions. The results showed Olsen P and PAC increase linearly with NPK and NPKS treatments; for every 100 kg ha−1 of P surplus, Olsen P increased by 5.9 and 6.7 mg kg−1, and PAC increased by 0.52% and 0.50%. With M and MNPK treatments, the sigmoid curve equation was the best fitting method. The equilibrium values were 167 and 164 mg kg−1 for Olsen P, and 10.4 and 10.2 mg kg−1 for PAC. There was a correlation between Al-P, Ca2-P, Resin-P, NaOH-Pi, C/N, SOC, and pH, which had the highest interpretation rates for Olsen P and PAC. Manure is significantly better than straw in improving Olsen P in red soil. It is recommended to reduce the amount of manure applied for a long time to avoid a zero increase in Olsen P. [ABSTRACT FROM AUTHOR]
- Subjects :
- *RED soils
*MANURES
*POLITICAL action committees
*STRAW
Subjects
Details
- Language :
- English
- ISSN :
- 20734395
- Volume :
- 13
- Issue :
- 6
- Database :
- Academic Search Index
- Journal :
- Agronomy
- Publication Type :
- Academic Journal
- Accession number :
- 164576690
- Full Text :
- https://doi.org/10.3390/agronomy13061647