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Effect of GA3 and Gly Plant Growth Regulators on Productivity and Sugar Content of Sugarcane

1
Institute of Applied Materials Science, VAST, TL29, ThanhLoc ward, Dist. 12, Ho Chi Minh City 700000, Vietnam
2
School of Applied Chemistry, TraVinh University, TraVinh City 940000, Vietnam
3
NTT Hi-Tech Institute, Nguyen Tat Thanh University, Ho Chi Minh City 700000, Vietnam
4
Department of Chemistry, Graduate University of Science and Technology, VAST, TL29, Thanh Loc ward, Dist. 12, Ho Chi Minh City 700000, Vietnam
*
Authors to whom correspondence should be addressed.
Agriculture 2019, 9(7), 136; https://doi.org/10.3390/agriculture9070136
Received: 6 May 2019 / Revised: 10 June 2019 / Accepted: 14 June 2019 / Published: 30 June 2019
(This article belongs to the Special Issue Cover Crops)
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Abstract

The use of plant growth regulators is one effective solution to improve sugarcane yields and sugar content in several countries. In this study, we examined the role of gibberellin acid (GA3) and glyphosate (Gly) plant growth regulators to determine the appropriate concentration of GA3 and Gly to increase the yield of sugarcane and sugar accumulation, respectively. The statistical results showed that GA3 was sprayed at 150 ppm to increment the actual yield by 19.94%; sucrose accumulation increased by 2.21%. With Gly treatment, although the yield decreased by 3.17%, sucrose accumulation increased by 11.27% compared to control trials. In this study, the combined concentration of 150 ppm of both GA3 and Gly gave the best results, for which sucrose accumulation increased from 2.21% to 10.74% and from 19.94% to 20.97% for actual yield. The results led to increased net income compared to the control. To address concerns about residues of plant growth regulators, residues of GA3 and Gly were evaluated after the sugarcane harvest using the HPLC and UV-vis methods, respectively. The analyzed results showed that their residues were lower than what is permitted in several countries. This showed the applicability of the study, on a large scale, to increase sucrose accumulation, productivity of sugarcane, and profit for farmers. View Full-Text
Keywords: plant growth regulators; gibberelin acid GA3; glyphosate; sucrose accumulation plant growth regulators; gibberelin acid GA3; glyphosate; sucrose accumulation
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Nguyen, C.T.; Dang, L.H.; Nguyen, D.T.; Tran, K.P.; Giang, B.L.; Tran, N.Q. Effect of GA3 and Gly Plant Growth Regulators on Productivity and Sugar Content of Sugarcane. Agriculture 2019, 9, 136.

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