Uptake of Phosphorus from Modified P-Enriched Douglas Fir Biochar and Its Effects on Crop Growth and P Use Efficiency
Date
2022-09-29Author
Arwenyo, Beatrice
Varco, Jac J.
Dygert, Andrew
Berry, Jaime
Mills, Julianna
Mohan, Dinesh
Pittman, Charles U.
Mlsna, Todd
Metadata
Show full item recordAbstract
The potential use of biochar as a sustainable soil amendment has recently
gained global recognition. The use of biochar as a soil additive is attributed to
its ability to improve soil chemical, physical and biological properties. Studies
have shown that biochar amendments can enhance soil nutrient retention and
availability, pH, water holding capacity, microbial activity and sequester car bon. In this study using corn (Zea mays L.) as an experimental crop, the in fluence of P availability from modified P enriched Douglas fir biochar (PEB),
triple super phosphate fertilizer (SPF), and modified Douglas fir biochar (MB)
on plant growth and P Use Efficiency (PUE) were compared. The rate of P
applied (0, 30, 60, 90 and 120 kg·ha−1
) was calculated based on % P content of
each soil additive. Except for MB treatments, P recovery, crop growth and P
Use Efficiency increased with application rates. The maximum above ground
dry matter yields corresponding to PEB, SPF and MB treatments were esti mated at 3488 kg·ha−1
, 2449 kg·ha−1 and 639 kg·ha−1
, while their respective
agronomic P use efficiency (AGE) rates were 32 kg·kg−1
, 17 kg·kg−1
, 0.5 kg·kg−1
.
Also, recovery of K, Mg, Ca, Zn, Fe, Cu, B and Mn improved in both PEB (p
value < 0.0003, r2 > 0.9) and SPF (p value < 0.0058, r2 > 0.9) treatments. More
studies at field scale are needed to demonstrate the practicability of using
modified P enriched Douglas fir biochar for soil amendments.
Collections
- Research Articles [11]
The following license files are associated with this item: