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Further Results on the Use of Gibberellic Acid on Grain Sorghum 1
Author(s) -
Stickler F. C.,
Pauli A. W.
Publication year - 1962
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1962.0011183x000200050011x
Subject(s) - pauli exclusion principle , gibberellic acid , mathematics , combinatorics , biology , horticulture , physics , particle physics , quantum mechanics , germination
V ARYING responses by crop plants to applications of gibberellic acid (GA) have been reported. Some workers have reported that GA response seemed most pronounced with greatest climatic limitations for growth, such as low temperatures (13, 14) and low soil moisture (9). Increased emergence rates were found for sorghum (8, 11) and increased heights following GA applications for several crops including alfalfa (10), wheat (1, 2), corn (1, 5). Corns (6) noted increased forage production in wheat following a foliar spray with 33 ppm GA. Finn and Nielsen (7) obtained increased first-cutting yields of alfalfa. Other studies, however, have shown that GA did not affect yields or cause decreased yields of wheat (12), corn (1, sorghum (8), alfalfa (6), or cotton (3). In some experiments (3, 12) decreased yields were attributed to decreased stands caused by GA applications to seeds. In a previous study at Manhattan, Kansas (11), field emergence rate of grain sorghum was increased by seed treatment applications of GA. In 1959, foliar spray applications of GA caused significant increases in height, grain yield, and total dry matter yields, particularly with the higher application rates. In the same experiment in 1960 no response was noted.