关键词: 苹果, 根域蓄水调控, 光合特性, 抗氧化酶活性

Abstract: In order to offer the theoretical basis of limited irrigation conditions for fruit planting fourteen-year-old‘Red Fuji’apple trees（rootstock Malus × hupehensis Rehd.）in field were used as materials to explore the effects of water-storage regulation conduced by burying bricks around roots on the rhizosphere soil environment，leave growth，photosynthesis characteristics and antioxidant enzyme activities of apple leaves. The results showed that the water content of different soil depth enhanced；The water content，chlorophyll and carotenoid content，net photosynthetic rate（Pn），stomatal conductance（Gs）and intercellular carbon dioxide concentration（Ci）of apple leaves also increased by the water-storage root regulation treatment. While the PSⅡ potential activity（Fv/Fo）and performance index（PIABS），the value of Tfm decreased at the same time by the water-storage root regulation treatment，which indicated that the conversion rate from light energy to chemical energy increased by the water-storage root regulation treatment. Compared with the control，the SOD，POD，CAT activities and MDA content in apple leaves were decreased with the treatment. In conclusion，water-storage regulation treatment could improve the content of soil water，increase the rate of photosynthetic carbon assimilation and electron transport，significantly reduce the generation of reactive oxygen species，which finally delayed the senescence and prolonged the functional period of apple leaves.

Key words: apple, water-storage regulation treatment, photosynthesis characteristic, antioxidant enzyme activity