Analysis of Soybean Yield Components as Affected by Plant Growth Regulators Applied at Flowering Stages

• Published in: Japanese Journal of Tropical Agriculture Vol. 39; no. 3; pp. 184 - 189
• Main Authors: KAMAL, Muhammad, TAKAHASHI, Hisamitsu, MIKOSHIBA, Haruo, OTA, Yasuo
• Format: Journal Article
• Language: English
• Published: Japanese Society for Tropical Agriculture 01.09.1995
• Subjects: Plant growth regulator; Soybean; Yield
• ISSN: 0021-5260; 2185-0259
• DOI: 10.11248/jsta1957.39.184

The final grain yield of soybeans is determined by the growth and development of the yield components. A pot experiment was conducted to evaluate the effect of PGR application at flowering stages on soybean grain yield, and to identify the yield components closely related to soybean yield increase by PGR application. The results showed that the soybean yield components differently responded to PGR application, and depended on the PGR concentration and soybean cultivars. Soybean Tachinagaha and Tidar cultivars, the application of 1 ppm ABA, 1 ppm GA3, 0.01 ppm epi-brassinolide, and 5 ppm kinetin at flowering stages increased the grain yield by 12. 1, 5.8, 5.9, and 9.3% over the control, respectively. Soybean grain yield increase induced by PGR application was due primarily to the increase in grain and pod number through the increase of fertile node number and number of pods per fertile node.