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The relationship between internode elongation of soybean stems and spectral distribution of light in the canopy under different plant densities
- Source :
- Plant Production Science, Vol 24, Iss 3, Pp 326-338 (2021)
- Publication Year :
- 2021
- Publisher :
- Taylor & Francis Group, 2021.
-
Abstract
- The present study carried out with a field plot experiment and light environment simulation experiment in 2017 to assess the effect of spectral distribution on internode elongation in soybean canopy. Henong 60 and Heinong 48 were used as the experimental materials. The spectral distribution in the soybean canopy was studied under four planting densities 200,000(D20), 300,000(D30), 400,000(D40) and 500,000(D50) plant ha−1. Meanwhile, a pot experiment of light environment simulation with light-emitting diode (LED) was carried out to further analyze the effects of light quantity and quality on the elongation of soybean seedlings. The results showed that the intensity of PAR, blue light, red light and far-red light in soybean canopy decreased by varying degrees with density and canopy depth increasing, and the decrease of PAR and R/FR led to significant elongation of internodes and plant height in high density. The spectral intensity in the middle and base of the canopy was strongly reduced, resulting in the strongest internode elongation in the middle of soybean stem. The increase in soybean plant height was also mainly due to the internode elongation in the middle at high density. In addition, the mono-light of far-red light could promote the internode elongation, while the red light and blue light acted as inhibitors and the inhibitory effect of blue light was even greater.
- Subjects :
- soybean
canopy spectrum
internode elongation
planting density
Plant culture
SB1-1110
Subjects
Details
- Language :
- English
- ISSN :
- 1343943X and 13491008
- Volume :
- 24
- Issue :
- 3
- Database :
- Directory of Open Access Journals
- Journal :
- Plant Production Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.8e49dcd5b80641d884ff1947924f95c8
- Document Type :
- article
- Full Text :
- https://doi.org/10.1080/1343943X.2020.1847666