A field experiment was conducted in Zixuan Grape Plantation, Jiayuguan, Hexi Corridor, Gansu Province, the effects of four different irrigation gradients including 240 mm (T1), 300 mm (T2), 360 mm (T3)and 420 mm (T4)were compared with those of the local conventional drip irrigation with an irrigation volume of 360 mm (CK), and the difference of growth of 3-year-old vine Merlot Noir were explored.The two-year study results showed that the photosynthetic transpiration rate and the chlorophyll, proline and malondialdehyde contents as well as the yield and quality of grape were significantly different under different irrigation conditions.The photosynthetic transpiration rate and chlorophyll content under the treatments of T3 and T4 were higher than those under the treatments of T1, T2 and CK, but the water use efficiency was low.The proline content and malondialdehyde content were increased with the decrease of irrigation volume.The yield and quality of grape irrigated under plastic film were superior to those under the conventional drip irrigation (CK), and the grape yield under T1 was increased by 2 009.78 kg·hm-2 compared with that under CK.Drip irrigation under plastic film was therefore helpful to promote the growth of vine, and the irrigation pattern T1 was also considered as an effective way to relieve water shortage in arid region.
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