Soil phosphorus mobilization as affected by long-term organic fertilization in a tropical Regosol
Purpose: Phosphorus mobilization (PM) in tropical Regosols may be harmful to the environment and water quality. It is expected that high contents of soluble phosphorus in sandy soils may promote the P leaching through the transport of the available phosphorus from the soil surface to deeper layers....
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
OICC Press
2024-03-01
|
| Series: | International Journal of Recycling of Organic Waste in Agriculture |
| Subjects: | |
| Online Access: | https://oiccpress.com/international-journal-of-recycling-of-organic-waste-in-agriculture/wp-content/uploads/private/IJROWA-Vol13-Issue2-pap132414.pdf?sec=$P$BUDd1b9DAMk19VE1YkxHQ1P5a1Z7a0/&auth=eyJmaWxlIjoiNDgxN2RlOGQzMWFkY2Q0NDlkYWJjMWZmNzRjZDdkNTUxNzFmOGQwZCIsInRpbWUiOjE3MTQ0NjYyNTYsInBvc3QiOjkxNDgsImV4cGlyZXMiOi0xfQ= |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Purpose: Phosphorus mobilization (PM) in tropical Regosols may be harmful to the environment and water quality. It is expected that high contents of soluble phosphorus in sandy soils may promote the P leaching through the transport of the available phosphorus from the soil surface to deeper layers. This study aimed to evaluate the PM in a tropical Regosol by using soil columns (10 cm depth) during steady saturated water flow and PM was correlated with Fe and Al oxides.
Method: Soil samples were collected in four sites characterized as smallholder farming systems that shared the same land uses and soil type with each other. P content was estimated by using water, Melich-1, and resin extraction protocols. We estimated the contents of Fe and Al oxides with high and low crystallinity. The miscible displacement technique was used to simulate P leaching in soil columns, and the leached P was quantified by colorimetry.
Results: Soil P loss showed a significant coefficient of determination (r2 > 0.80) with P content. We found the highest values of Fe oxalate (0.30 mg/g), and Al oxalate (0.53 mg/g) in the long-term organic fertilization, while the highest values of Fe dithionite and Al dithionite were found with the non-fertilization system.
Conclusion: The highest soil pH (8.01), soil P content by different extractors (P mehlich-1, P water, and P resin were 54.45, 14.36, and, 38.70 mg/kg, respectively), and soil P loss (128.83 mg/kg) were observed with the long-term non-fertilization system.
Highlights:
The continuous use of higher rates of farmyard manure influences the soil chemical properties and P loss in a Regosol.
Areas with long-term use of farmyard manure show a high rate of P mobilization.
Areas with the addition of high rates of farmyard manure in a short-term schedule may increase P mobilization.
The use of farmyard manure improves the organic matter accumulation, and available phosphorous, which leads to high vertical P loss. |
|---|---|
| ISSN: | 2195-3228 2251-7715 |