Effects of shading and nitrogen application levels on growth and photosynthesis characteristics of <i>Coffea arabica</i>

ZHANG Wenhui; LIU Xiaogang; WANG Lu; LI Yilin; CONG Yan; YANG Qiliang; SUI Long

doi:10.7671/j.issn.1001-411X.201805002

Journal of South China Agricultural University > 2019 > 40(1): 32-39. > DOI: 10.7671/j.issn.1001-411X.201805002

ZHANG Wenhui, LIU Xiaogang, WANG Lu, et al. Effects of shading and nitrogen application levels on growth and photosynthesis characteristics of Coffea arabica[J]. Journal of South China Agricultural University, 2019, 40(1): 32-39. DOI: 10.7671/j.issn.1001-411X.201805002

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Effects of shading and nitrogen application levels on growth and photosynthesis characteristics of Coffea arabica

Faculty of Modern Agricultural Engineering, Kunming University of Science and Technology, Kunming 650500, China

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Received Date: May 02, 2018
Available Online: May 17, 2023

Graphical Abstract

Abstract

Abstract

Objective
To explore the optimal coupled management mode of light intensity and nitrogen application for Coffea arabica seedlings.

Method
We set three shading levels: No shade (S₀, natural light), light shade (S₁, 65% natural light) and severe shade (S₂, 30% natural light), and three nitrogen levels: No nitrogen (N₀,0 g·kg⁻¹), medium nitrogen (N₁, 0.20 g·kg⁻¹), high nitrogen (N₂, 0.40 g·kg⁻¹). The effects of shading and nitrogen levels on growth, daily photosynthetic characteristics and biomass accumulation of C. arabica seedlings were studied.

Result
With the increase of shading degree, the total chlorophyll content increased. Compared with S₀ treatment, the net photosynthetic rate, stomatal conductance, light radiation use efficiency and total biomass of C. arabica in S₁ treatment increased by 13.54%, 18.54%, 127.77% and 12.41%, respectively. The total biomass decreased by 11.55% in S₂ treatment. Compared with N₀ treatment, the net photosynthetic rate, stomatal conductance, light radiation use efficiency and total biomass of C. arabica in N₁ treatment increased by 27.25%, 20.77%, 10.80% and 18.47%, respectively, and these traits in N₂ treatment increased by 14.85%, 25.99%, 41.65% and 21.02%, respectively. Compared with S₀N₀, with the increases of shading and nitrogen levels, leaf transpiration rate and light radiation use efficiency increased, leaf water use efficiency firstly increased and then decreased.

Conclusion
The optimal mode of light and nitrogen management of C. arabica is the combination of light shade and high nitrogen (S₁N₂). This mode is suitable for obtaining high leaf water-radiation use efficiency and biomass.
- Coffea arabica,
- shading,
- nitrogen,
- photosynthetic characteristic,
- biomass

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References (28)

References

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