| 摘要: |
| 【目的】 通过对灌水均匀度的研究，寻求改进和提高低压灌溉系统灌水均匀度的途径和方法。【方法】 通过试验研究了低压条件下毛管进口压力、铺设长度、铺设坡度及管径等参数对灌水均匀度的影响，并用SPSS统计分析软件对试验数据进行了处理。【结果】 在其他条件不变时，灌水均匀度随着毛管管径的增大而增大，随着毛管铺设长度的增大而减小，逆坡时，随着坡度的增大而减小，顺坡时，随着坡度的增大呈先增大后减小的趋势；毛管进口压力对灌水均匀度影响不显著，毛管铺设长度、管径及铺设坡度对灌水均匀度影响显著，其中毛管铺设长度影响最大，毛管管径次之，毛管铺设坡度最小。【结论】 可以通过适当增大毛管管径、减小灌水器设计流量及对地形适当分区等措施，提高低压滴灌系统的灌水均匀度，保证系统的灌水质量。 |
| 关键词: 低压滴灌 灌水均匀度 毛管铺设长度 毛管管径 |
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| 基金项目:国家“863”重点项目“微压滴灌系统与产品”（2006AA100214） |
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| Experimental research on drip irrigation uniformity at low-pressure |
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WANG Ya hong WANG Zheng zhong LI Xiao hui YAO Ru fang
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| Abstract: |
| 【Objective】 The study was done in order to improve low pressure drip irrigation uniformity.【Method】 The experiment was conducted to study the influence of lateral inlet operating pressure,lateral length,terrain slope and lateral diameter on irrigation uniformity at low pressure.The experimental data was analyzed with SPSS.【Result】 The result shows that,irrigation uniformity increases as lateral diameter increases,decreases as lateral length increases,decreases as terrain slope increases on uphill slope and increases firstly and decreases later as terrain slope increases on downhill slope.There is no significant statistical difference between lateral inlet operating pressure and irrigation uniformity.Lateral length,lateral diameter and terrain slope have a significant influence on irrigation uniformity.The influence of lateral length is more significant than that of lateral diameter,and the influence of lateral diameter is more significant than that of terrain slope.【Conclusion】 Irrigation uniformity can be improved by increasing lateral diameter,decreasing designed flow rate of emitter and dividing the land into several zones according to terrain elevation. |
| Key words: low-pressure drip irrigation irrigation uniformity lateral length lateral diameter |
