| Analysis on influence factors of subsurface drip irrigation emitter discharge under silt loam soil condition |
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| DOI：10.7606/j.issn.1000-7601.2009.01.28 |
| Key Words: subsurface drip irrigation emitter influence factor path analysis |
| Author Name | Affiliation | | WANG Xiaoyu | Key Lab of Northwest Water Resources and Environment Ecology Ministry of Education Xi’an University of Technology,Xi’an, Shaanxi 710048,China | | BAI Dan | Key Lab of Northwest Water Resources and Environment Ecology Ministry of Education Xi’an University of Technology,Xi’an, Shaanxi 710048,China | | LI Zhanbin | Key Lab of Northwest Water Resources and Environment Ecology Ministry of Education Xi’an University of Technology,Xi’an, Shaanxi 710048,China | | LI Gang | Key Lab of Northwest Water Resources and Environment Ecology Ministry of Education Xi’an University of Technology,Xi’an, Shaanxi 710048,China |
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| Abstract: |
| The experiment scheme was arranged based on uniform design with mix levels of three factors which are respectively work pressure of emitter, soil bulk density and initial soil water content.The experiment data of three factors was made on correlation analysis, regression analysis and path analysis.Influence degree of these factors on emitter discharge under subsurface drip irrigation (SDI) could be directly estimated and compared through path coefficients.Analysis results show that the direct path coefficient of work pressure to SDI emitter discharge is the most.The indirect path coefficients of initial soil water content and soil bulk density to SDI emitter discharge are secondary.But the other direct or indirect path coefficients are very small, and residue path coefficient is also small.Therefore the relationship of hydraulic characteristics of SDI emitter might be reflected by these three experiment factors.Work pressure is the decisive factor to SDI emitter discharge, and the influences of initial soil water content and soil bulk density on SDI emitter discharge through work pressure can not be ignored.The results have important theoretical and practical application values to SDI hydraulic calculation and engineering design. |
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