RESEARCH PAPER
Effects of mepiquat chloride (MC) spraying on the lodging resistance and yield characteristics of soybean
1
Agricultural College, Northeast Agricultural University, Hharinbain 150030, China
Final revision date: 2025-01-27
Acceptance date: 2025-02-21
Publication date: 2025-04-01
Int. Agrophys. 2025, 39(2): 191-201
HIGHLIGHTS
- Soybean lodging significantly impacts grain yield
- The use of mepiquat chloride has proven to be an effective solution to this issue
- Mepiquat chloride not only reduces lodging but also positively impacts soybean yield
- Establishing the optimal concentration range for application
KEYWORDS
TOPICS
ABSTRACT
Soybean lodging exerts a significant impact on yield, and the application of growth regulators represents a cru-
cial approach to mitigate soybean lodging. In this study, we investigated the impact of spraying mepiquat chloride on soybean lodging resistance and yield. We also assessed the relationship between soybean stem characteristics (breaking force, stem bending, semi-cellulose content), stem length, and dry weight and lodging resistance parameters. Additionally, we examined the correlation between pod number, 100 seed weight, and yield. The findings showed that applying mepiquat chloride spray effectively improved soybean’s lodging resistance by increasing stem breaking force and reducing plant height. The present study investigates the impact of mepiquat chloride on soybean growth, bridging the knowledge gap regarding the influence of the plant growth regulator – mepiquat chloride on soybean production. The research results show that spraying 200 mg L-1 mepiquat chloride during the three-leaf stage and early flowering stage of soybeans has the best effect on balancing soybean lodging resistance and yield. Compared with HN44CK, the 200 mg L-1 treatment increased the yield by 25.5 g/4 plants. Furthermore, it offers theoretical support and a scientific foundation for enhancing soybean yield and lodging resistance.
FUNDING
This work was supported by the National Key Research and Development Program of China (2024YFD1500303). Heilongjiang Provincial Natural Science Foundation of China (LH2021C023). The fund comes from the Heilongjiang Provincial Department of Science and Technology (2021-2024).
CONFLICT OF INTEREST
The authors declare no conflict of interest.
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