Effects of mixed irrigation using brackish water with different salinities and reclaimed water on a soil-crop system
文献类型： 外文期刊
作者： Liu, Chuncheng 1 ; Cui, Bingjian 1 ; Hu, Chao 1 ; Wu, Haiqing 1 ; Gao, Feng 1 ;
作者机构： 1.Minist Agr, CAAS Key Lab Water Saving Irrigat Engn, Inst Farmland & Irrigat, Xinxiang 453002, Henan, Peoples R China
2.Sch Chinese Acad Agr Sci, Beijing 100081, Peoples R China
3.Agr Water & Soil Environm Field Sci Res Stn Xinxi, Xinxiang 453000, Henan, Peoples R China
关键词： brackish water; crop; IBRv2; mixed irrigation; reclaimed water; soil
期刊名称：WATER REUSE
ISSN： 2709-6092
年卷期：
页码：
收录情况： SCI
摘要： To explore the effects of mixed irrigation on soil and crops, a pot experiment was conducted in two salinity levels of brackish water, four levels of mixed brackish-reclaimed water and freshwater irrigation as the control. The soil Na-Cl to Ca-SO4 contents changed, and activities of soil alkaline phosphatase and polyphenol oxidase changed, exhibiting a 'V'-shaped curve with increasing the proportion of reclaimed water in the mixture. At the same brackish-reclaimed water level, there were no significant differences in alkaline phosphatase and polyphenol oxidase activities except for soil alkaline phosphatase activity decreasing significantly with the increase in salinity under brackish water irrigation. Mixed irrigation obviously improved superoxide dismutase activity but no significant influences on aboveground dry weight, underground biomass or crop physiological indexes (chlorophyll, soluble protein, malondialdehyde, peroxidase, catalase). Based on the integrated biological response index version 2 (IBRv2), the deviation of reclaimed water irrigation was the smallest, followed by 1:1 and 1:2 (3, 5 g/L brackish water salinities, respectively), with IBRv2 values of 7.94, 12.55 and 16.04. Therefore, considering the soil-crop characteristics, limited daily water amount and inadequate pipeline facilities for reclaimed water, the brackish-reclaimed water ratio should be 1:1 and 1:2 at 3, 5 g/L of brackish water, respectively.
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