正交试验下提高胡杨幼苗水分利用效率途径研究

Research on Improving Water Use Efficency of Populus euphratica under Orthogonal Test

【目的】提高胡杨幼苗水分利用效率途径。【方法】试验在单因子试验的基础上,根据胡杨生长特点和种植中存在的实际问题,采用密度、灌水周期、施肥浓度和黄腐酸喷施浓度的4因素5水平正交试验。【结果】灌水量是影响胡杨水分利用效率的主要因素;各因素对胡杨水分利用效率影响强度大小的顺序是:灌水频率>黄腐酸喷施量>密度>施肥量。【结论】提高胡杨水分利用效率的最佳组合为灌水周期为13 d,密度25株/盆,施肥浓度1 mg/mL、黄腐酸喷施浓度1.6 mg/mL。

[ Objective and Method] In the Populus euphratica original ecological environment, the 4- factor 5 - level orthogonal test was designed to discuss the 4 factors 5 - level orthogonal test：density, irrigation, fertilization and spraying the amount of fulvic acid. [Result]The results showed that the impact on irrigation water use effieieney of Populus euphratica was the main factors;the order of the intensity of the factors affecting water use efficiency of Populus euphratica was： irrigation frequency 〉 fulvic acid spray volume 〉 density 〉 fertilizer; [Concluslon]the best combination of improving water use efficiency of the Populus euphratica was irrigation eyele 1 time per 16 days, the planting density was 25 plant per pot the concentration of fertilizer was 1 mg/mL, the concentration of fulvie acid spraying was 1.6 mg/mL.