Impact of Biochar and Different Nitrogen Sources on Forage Radish Production in Middle Tennessee

Authors

  • Todd Pirtle Middle Tennessee State University
  • Lee Rumble Middle Tennessee State University
  • Michael Klug Middle Tennessee State University
  • Forbes Walker University of Tennessee
  • Song Cui Middle Tennessee State University
  • Nathan Phillips Middle Tennessee State University

DOI:

https://doi.org/10.24297/jaa.v10i0.8035

Keywords:

Biochar, Crop Productivity, Manure, Soil Respiration, Fertilization, Forage Radish

Abstract

Short-season forage radish (Raphanus sativus L. var. longipinnatus) has recently gained great popularity in Middle Tennessee and many parts of the world used as a high-quality vegetable crop for human consumption or a forage crop for winter grazing and cover cropping. In this study, we (i) estimated soil pH buffering capacity and microbial activity, (ii) quantified crop productivity influenced by different biochar amendment rates and N fertilizer management practices based on a factorial treatment design. Particularly, biochar was amended at rates of 0, 5, 20, and 40 Mg/ha; N fertilizer was applied at zero (N0), 122 kg/ha of urea (56 kg/ha of N; N1) and 4.8 Mg/ha of aged dairy cattle manure (56-60 kg/ha of N), providing a total of 12 treatments (four biochar rates × three fertilization practices). The combination of biochar and inorganic N fertilizer such as urea appeared to have positive impacts on the short-term biomass production, soil pH buffering capacity, and enhanced soil microbial activity for short-season forage radish production (P < 0.05). Future research is warranted to evaluate the use of biochar in field-based forage/vegetable studies in Tennessee.

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Author Biographies

Todd Pirtle, Middle Tennessee State University

School of Agriculture, Middle Tennessee State University, Murfreesboro, TN 37132, USA,

 

Lee Rumble, Middle Tennessee State University

Department of Biology, Middle Tennessee State University, Murfreesboro, TN 37132, USA

Michael Klug, Middle Tennessee State University

School of Agriculture, Middle Tennessee State University, Murfreesboro, TN 37132, USA,

Forbes Walker, University of Tennessee

Department of Biosystems Engineering and Soil Science, University of Tennessee, Knoxville, TN 37996, USA,

Song Cui, Middle Tennessee State University

School of Agriculture, Middle Tennessee State University, Murfreesboro, TN 37132, USA

Nathan Phillips, Middle Tennessee State University

School of Agriculture, Middle Tennessee State University, Murfreesboro, TN 37132, USA

Published

2019-01-31

How to Cite

Pirtle, T., Rumble, L., Klug, M., Walker, F., Cui, S., & Phillips, N. (2019). Impact of Biochar and Different Nitrogen Sources on Forage Radish Production in Middle Tennessee. JOURNAL OF ADVANCES IN AGRICULTURE, 10, 1594-1610. https://doi.org/10.24297/jaa.v10i0.8035

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