Effect of Limited Irrigation and Nitrogen on Ecological Index and Water Use of Arabica Coffee

Abstract:

The objective of this study was to explore the water and nitrogen coupling use efficiency and optimal control of water and nitrogen environment, Pot experiment was conducted in intelligent greenhouse, and the interactive impact of water and nitrogen on ecological characteristics and water use of arabica coffee was investigated. Using four irrigation levels, i.e. sufficient irrigation (SI, soil moisture content was 75%~85% of soil field capacity), light deficit irrigation (DI1, soil moisture content was 65%~75% of soil field capacity), medium deficit irrigation (DI2, soil moisture content was 55%~65% of soil field capacity) and serious deficit irrigation (DI3, soil moisture content was 45%~55% of soil field capacity), and four fertilizer levels of N, i.e. high nitrogen (N_H), medium nitrogen (N_M ), low nitrogen (N_L), non-nitrogen (N_N). The results showed that increase of irrigation or N rate was helpful to improve the ecological and morphological index of arabica coffee (plant height, basal stem, leaf area and shoot length). Compared to the N_N treatment, N application could increase dry mass accumulation and water use efficiency (WUE) by 10.88%~37.49% and 24.73%~33.01% respectively. Compared to the DI3 treatment, increase of irrigation could increase dry mass accumulation and WUE by 82.54%~163.27% and 34.40%~39.66% respectively. Low nitrogen combined sufficient irrigation treatment could promote morphological characteristics of arabica coffee seedling and ensure higher dry mass accumulation and WUE simultaneously.

• Periodical: Advanced Materials Research (Volumes 807-809)
• Pages: 746-749
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.807-809.746
• Online since: September 2013
• Authors: Xiao Gang Liu, Yuan Zhong, Xin Le Wang, Qi Liang Yang
• Keywords: Arabica Coffee, Dry Mass Accumulation, Ecological Index, Limited Irrigation, Water Use Efficiency (WUE)

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