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Competition among Adjacent Rows of Grain Sorghum of Different Height Genotype 1
Author(s) -
Kern J. J.,
Atkins R. E.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200010027x
Subject(s) - sorghum , hybrid , agronomy , biology , sorghum bicolor , competition (biology) , grain yield , sweet sorghum , poaceae , ecology
A 2‐year study was conducted at Ames, Iowa, to evaluate the role of plant height as a factor affecting interrow competition in grain sorghum ( Sorghum bicolor (L.) Moench) performance tests. A secondary objective was to determine the effect of height genotype on several agronomic characters of sorghum. Hybrids having 3✕3‐ and 4✕3‐dwarf height genotypes were bordered by themselves and, in turn, by each other. Grain yields of 3✕3 hybrids were enhanced about 4% when 4✕3 border rows were used, and yields of 4✕3 hybrids were depressed about 3% when bordered by 3✕3 hybrids. Row spacings, female parents, and pollinators did not exert pronounced or consistent effect on the competition attributable to height differences. Hybrids having a 3✕3 height genotype usually exceeded the 4✕3 hybrids in number of seeds/head, 100‐seed weight, and grain yield, but they produced fewer heads/plant and bloomed later than the short hybrids.