Evaluation of Sorghum Emergence and Grain Yield Response to Seeding Density and Plant Spacing Attained Using the OSU Hand Planter
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Date
2021
Authors
Nambi, Eva
Aula, Lawrence
Oyebiyi, Fikayo B.
Eickhoff, Elizabeth M.
Omara, Peter
Carpenter, Jonathan
Raun, William R.
Journal Title
Journal ISSN
Volume Title
Publisher
Communications in Soil Science and Plant Analysis
Abstract
Plant spacing and density are important metrics in crop production because
they impact the plant’s ability to utilize resources and attain full yield
potential. Planting sorghum (Sorghum bicolor (L.) Moench) in a more narrow
spacing brings about phytochrome-mediated responses, where plants
develop narrow leaves, long stems, fewer roots, and this is linked to competition
that plants develop for nutrients like nitrogen (N). The Oklahoma State
University hand planter (OSU-HP) can improve plant homogeneity and midseason
placement of N. However, this crop production tool alongside other
agronomic practices have not been adequately evaluated for improving
sorghum grain yields. The objective of this work was to evaluate the
response of sorghum to planting methods, the number of seeds per hole,
within row spacing, and N rate. A randomized complete block design with 13
treatments replicated 3 times was used in this study. The treatments
included different combinations of 3 planting methods (John Deere [JD],
OSU-HP, and stick planter [check]), 3 within-row spacings (10, 30, and 60 cm),
3 different number of seeds per hole (1, 3, and 6) and 3 N rates (0, 30 and
60 kg ha−1). Average grain yield with 3 seeds per hole was at least 18% higher
than the yield range of 0.7 to 4.6 Mg ha−1 achieved with 1 or 6 seeds per hole.
This study demonstrated that the production of sorghum using sound
agronomic practices could improve yield.
Description
Keywords
Sorghum, Nitrogen, Urea incorporation, Hand planter, Plant spacing
Citation
Eva Nambi, Lawrence Aula, Fikayo B. Oyebiyi, Elizabeth M. Eickhoff, Peter Omara, Jonathan Carpenter & William R. Raun (2021): Evaluation of Sorghum Emergence and Grain Yield Response to Seeding Density and Plant Spacing Attained Using the OSU Hand Planter, Communications in Soil Science and Plant Analysis, DOI: 10.1080/00103624.2021.1892734