The effects of pressure，flow rate and diameter size on drip irrigation uniformity were studied under 8 different pressures with three
different tube diameters of PE tubes and three different flow drops． The results show that the influence of the size of pipe diameter on the
uniformity of drip irrigation is not significant when considering a single factor; the drop irrigation uniformity values of the 2．0 L/H treatment
and 4．0 L/H treatment are significantly higher than that of the 1．2 L/H treatment; when considering two factors，the combinations of A3+B3，
A3+C6，and B3+C5 can obtain the highest uniformity in the combinations of A+B，A+C，and B+C，respectively． When considering three
factors，the combination of A1+B3+C6 is the optimal one． Therefore，in practice，choosing the above combination according to different
factors can obtain the optimal uniformity．
Key words
pipe diameter /
dripper flow /
pressure /
drip irrigation uniformity
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References
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