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- Title
Biochar Application in Combination with Inorganic Nitrogen Improves Maize Grain Yield, Nitrogen Uptake, and Use Efficiency in Temperate Soils.
- Authors
Omara, Peter; Aula, Lawrence; Oyebiyi, Fikayo B.; Eickhoff, Elizabeth M.; Carpenter, Jonathan; Raun, William R.
- Abstract
Biochar (B) has shown promise in improving crop productivity. However, its interaction with inorganic nitrogen (N) in temperate soils is not well-studied. The objective of this paper was to compare the effect of fertilizer N-biochar-combinations (NBC) and N fertilizer (NF) on maize (Zea mays L.) grain yield, N uptake, and N use efficiency (NUE). Trials were conducted in 2018 and 2019 at Efaw and Lake Carl Blackwell (LCB) in Oklahoma, USA. A randomized complete block design with three replications and ten treatments consisting of 50, 100, and 150 kg N ha−1 and 5, 10, and 15 Mg B ha−1 was used. At LCB, yield, N uptake, and NUE under NBC increased by 25%, 28%, and 46%, respectively compared to NF. At Efaw, yield, N uptake, and NUE decreased under NBC by 5%, 7%, and 19%, respectively, compared to NF. Generally, results showed a significant response to NBC at ≥10 Mg B ha−1. While results were inconsistent across locations, the significant response to NBC was evident at LCB with sandy loam soil but not Efaw with silty clay loam. Biochar application with inorganic N could improve N use and the yield of maize cultivated on sandy soils with poor physical and chemical properties.
- Subjects
OKLAHOMA; NATIONAL Broadcasting Co. Inc.; BIOCHAR; GRAIN yields; NITROGEN fertilizers; SANDY loam soils; CORN yields; CORN; SOILS
- Publication
Agronomy, 2020, Vol 10, Issue 9, p1241
- ISSN
2073-4395
- Publication type
Article
- DOI
10.3390/agronomy10091241