Next Article in Journal
Classification of Noise Sources for Port Area Noise Mapping
Previous Article in Journal
Status of Life Cycle Assessment (LCA) in Africa
Previous Article in Special Issue
Measuring Soil Metal Bioavailability in Roadside Soils of Different Ages
Article

Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil

Plant and Soil Sciences Department, Oklahoma State University, Stillwater, OK 74078, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Dionisios Gasparatos
Received: 7 January 2021 / Revised: 31 January 2021 / Accepted: 2 February 2021 / Published: 8 February 2021
(This article belongs to the Special Issue Soil Contamination by Heavy Metals and Metalloids)
Little is known about the effect of nitrogen (N) application via biochar on the removal of trace elements by crops, and the effects with chemical fertilizers are inconsistent. We determined, from a previous study, the influence of increased N addition via biochars produced from switchgrass (SGB) and poultry litter (PLB) on cadmium (Cd) removal by ryegrass. The biochar rates of 0, 0.5, 1, 2, and 4% w/w were applied to a Cd-contaminated soil before seeding in a potting experiment with a complete randomized block design (CRBD). Ryegrass yield and N and Cd removed by harvest were strongly related (p < 0.05). The ryegrass yields increased up to 1% of PLB, and Cd removal was also the highest at 1% of PLB. The biomass of ryegrass roots increased with Cd accumulation (p < 0.05). Overall, the Cd transfer factor (TF) from ryegrass roots to shoots increased when up to 206 ± 38 kg N ha−1 was removed in ryegrass shoots (p < 0.0001). The application of PLB up to 1% might be a viable option since it is a practical rate for handling operations requiring less volume of material than SGB. Additionally, the Cd concentration in the aboveground forage remained acceptable for grazing cattle. Future studies are encouraged to evaluate different sources of N fertilizers affecting Cd uptake on cash crops. View Full-Text
Keywords: cadmium; biochar application rates; metal accumulation; nitrogen; ryegrass cadmium; biochar application rates; metal accumulation; nitrogen; ryegrass
Show Figures

Figure 1

MDPI and ACS Style

Antonangelo, J.; Zhang, H. Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil. Environments 2021, 8, 11. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8020011

AMA Style

Antonangelo J, Zhang H. Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil. Environments. 2021; 8(2):11. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8020011

Chicago/Turabian Style

Antonangelo, João, and Hailin Zhang. 2021. "Influence of Biochar Derived Nitrogen on Cadmium Removal by Ryegrass in a Contaminated Soil" Environments 8, no. 2: 11. https://0-doi-org.brum.beds.ac.uk/10.3390/environments8020011

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop