Lodging markedly reduced the biomass of sweet sorghum via decreasing photosynthesis in saline-alkali field

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Abstract

Lodging is a serious problem in plant growth, especially in crops growth of the natural habitat. In order to determine the influence of lodging on the growth characters of sweet sorghum, plants grown in natural saline-alkali environment were used to investigate the fresh weight, dry weight, sugar content in the stalks and the photosynthesis index of salt tolerant crop sweet sorghum. Results showed that lodging significantly reduced the growth of sweet sorghum, the fresh weight and dry weight was only 28.3% and 22.5% of the normal plants when lodging occurred after 49 days. Lodging also reduced the stalks sugar content of sweet sorghum, the stalk sugar content of lodged plants was only 45.4% of that in the normal plants, when lodging occurred for 49 days. Lodging reduced the growth and sugar content by reducing the photosynthesis parameters of sweet sorghum grown in the saline-alkali field, thus, affected the accumulation of photosynthate. Interestingly, with the extension of the lodging time, lodging led to a decrease in photosynthetic rate of sweet sorghum mainly due to non-stomatal factors.

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Guo, J. R., Fan, H., & Wang, B. S. (2018). Lodging markedly reduced the biomass of sweet sorghum via decreasing photosynthesis in saline-alkali field. In E3S Web of Conferences (Vol. 38). EDP Sciences. https://doi.org/10.1051/e3sconf/20183802016

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