Abstract: The aging rate of drip irrigation tape in a cotton planting field was compared with that under a UVA-340 lamp. For artificial accelerated radiation, the strenth was 0.68 W/m2, blackboard temperature was 60 ℃, the condensing temperature was 60 ℃, expose time was 3 h, condensing time was 3 h, wind-blowing for 10 min, the reservation rate of elongation at break was 84.4 % after 12 days, while for the natural condition, the rate was 78.8 % after 150 days' exposure.

Key words: drip irrigation tape, artificial aging, natural exposure aging, elongation at break