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Effects of regulated deficit irrigation on soil salinity,physiological processes and fruit quality of gray jujube under desert conditions

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International Journal of Agricultural and Biological Engineering 2019年第3期12卷 52-59页

作者： Zhipeng Liu Chengli Zhu Shuyu Wu Weihua Guo Yitikaer Abudushalamu Xiyun Jiao Shipei Gao Jie Wang College of Agricultural Engineering Hohai UniversityNanjing 210098China College of Hydraulic and Civil Engineering Xinjiang Agricultural UniversityUrumqi 830052China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China Hydraulic Research Institute of Jiangsu Province Nanjing 210017China Development Center for Science and Technology of Rural Water Resources of Jiangsu Province Nanjing 210029China

Regulated deficit irrigation(RDI)was applied to gray jujube trees in an oasis region,to determine the effects of this irrigation system on soil salinity,gray jujube physiological processes,fruit yield,and fruit *** consisted of severe,moderate and low deficit irrigation(irrigated with 85%,70%and 55%of CK,respectively)at the flowering stage to fruit set *** the other growth stages,all treatments were irrigated with 80%of pan evaporation,which was the same as that in *** results indicated that soil salinity was enhanced during the periods of water stress,but the high value of soil salinity declined by 3.48%-37.27%,at each depth,after irrigation was *** caused a decline in the photosynthetic rate,transpiration rate,and stomatal conductance,but enhanced the water use efficiency of the ***,the leaf photosynthetic rate was effectively enhanced after the recovery of irrigation,especially in the moderate deficit irrigation treatment,which exceeded the *** led to an improved fruit yield,which was 9.57%higher than that of the *** deficit treatments caused a significant increase in the soluble solid content,soluble sugar content,single fruit weight and sugar/acid *** vitamin C content,resulting from deficit treatments,has also been observed in the gray ***,this research shows that RDI provides some benefits in the production of gray jujube trees in desert conditions.

关键词： regulated deficit irrigation soil salinity gray jujube water use efficiency photosynthetic rate transpiration rate stomatal conductance soluble solid content sugar/acid ratio

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