Theses and Dissertations

ORCID

https://orcid.org/0009-0008-5051-4612

Advisor

Dhillon, Jagmandeep

Committee Member

Bheemanahalli, Raju Rangappa

Committee Member

Bryant, Corey

Committee Member

Reed, Vaughn

Committee Member

Larson, Erick

Date of Degree

5-10-2024

Original embargo terms

Embargo 1 year

Document Type

Graduate Thesis - Open Access

Major

Plant and Soil Sciences (Agronomy)

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Plant and Soil Sciences

Abstract

A field study was conducted in 2022 and 2023 at two different locations in Mississippi (MS) implementing a split-plot design. Nitrogen (N) rates as the main plot including 0 (control), 90, 180, 269 kg N ha-1 at Starkville and 224 kg N ha-1 at Stoneville. The subplot was seven treatments, including a no biostimulant (check) and six commercially available microbial biostimulants (Source Corn®, Envita®, iNvigorate®, Blue N®, Micro AZTM, and Bio level phosN®) applied either as foliar at V4-V5 growth stages or in-furrow at planting. Only N rates positively affected grain yield and nitrogen use efficiency at all site years. The agronomic optimum N rate (AONR) differed across all site years, ranging from 202, 128, and 166 kg N ha-1 at Starkville 2023 and Stoneville 2022 and 2023. In summary, microbial biostimulants within this study showed minimal to no effect on corn grain yield and all other tested parameters.

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