| The objective of this study was to explore the effect of water and nitrogen fertilizer on growth characteristics of plant with the tropical features, using pot experiment with four water treatments including SI sufficient irrigation (75%～85%θF), DI1 light deficit ir
rigation (65%～75%θF), DI2 medium deficit irrigation (55%～65%θF), and DI3 serious deficit irrigation (45%～55%θF), and four nitrogen rates of high nitrogen (NH), medium nitrogen (NM), low nitrogen (NL), and non-nitrogen (NN). The influence of deficit irrigation and nitrogen nutrition on growth a
nd water consumption of coffee arabica seedling were studied. Results showed that irrigation and nitrogen application was helpful to improve the growth and morphological index of coffee arabica such as plant height, basal stem, leaf area, and shoot length. Compared to the non-nitrogen treatment, nitrogen increased dry mass accumulation and water use efficiency by the range of 10.88%～37.49% and 24.73%～33.01%, respectively. Compared to the serious deficit irrigation treatment, irrigation increase increased dry mass accumulation and water use efficiency by the range of 68.01%～141.90% and 22.48%～40.89%, respectively. Low nitrogen combined with sufficient irrigation promote the growth of arabica coffee seedling, resulting in both higher dry mass accumulation and water use fficiency(WUE). |