Within‐Row Plant Spacing Variability Does Not Affect Corn Yield
By Weidong Liu, M. Tollenaar, G. Stewart, W. Deen. Agronomy Journal, 2004
104 citations recorded by the source corpus.
Nonuniform plant spacing within the row in corn (Zea mays L.) may reduce grain yield. To investigate the response of corn to plant spacing variability, experiments were conducted at two locations in south-central Ontario during 2000 and 2001. Six plant spacing treatments, 6.7 to 16.2 cm in standard deviations (SD), were established by planting Roundup Ready corn with increasing proportions of conventional corn seeds and then removing the conventional corn using glyphosate before three-leaf stage. Using SD as well as short gap, long gap, double, and cluster as an index of plant spacing variability, effects of plant spacing variability on corn growth and grain yield were investigated. Averaged across locations and years, grain yield was not significantly affected by plant spacing variability. Plant spacing variability also had no significant effect on leaf number, plant height, leaf area index, and harvest index. There were no correlations between plant spacing variability and stalk lodging and barren or double ears. The lack of strong correlations among plant growth, grain yield, and plant spacing variability indicates that spacing uniformity within the range used in this study is not a significant factor in determining grain yield under commercial conditions and common plant densities used in Ontario.
Subfields: Agronomy and Crop Science, Plant Science, Safety Research
View Paper: https://www.semanticscholar.org/paper/267625946e978691b6ab295cabd2d405a349d42a
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Citations in the corpus
- Effect of Crowding Stress on Dry Matter Accumulation and Harvest Index in Maize (2006, background): “Although several studies have shown no significant effects of spacing variability on grain yield in maize (Edmeades and Daynard, 1979; Daynard and Muldoon, 1983; Lauer and Rankin, 2004; Liu et al., 2004b ), other reports have shown that grain yield increased with enhanced plantspacing precision (Do”
- Response of Corn Grain Yield to Spatial and Temporal Variability in Emergence (2004, background): “1).bach et al., 1972; Muldoon and Daynard, 1981; Lauer, § Grain yield of any plant position treatment compared with the control2001; Liu et al., 2004).”
- Response of maize and soybean to variability in stand uniformity (2005, background): “Contrarily, Liu et al., 2004b).”