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| Impact of Saline Water Irrigation on Fruit Yield and Quality of Melon (Cucumis melo cv. Huanghemi) in Northwest China |
| Huang Cuihua1, Xue Xian1, Luo Jun1,2, Peng Fei1, Wang Tao1 |
1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Melon plants (Cucumis melo cv. Huanghemi) was grown in an open field trial to investigate the effect of increased saline water concentration on yield, crop tolerance and fruit quality. Three saline water concentrations were evaluated: 0.8, 2 g·L-1and 5 g·L-1. The melon was irrigated by furrow irrigation. Total ETc decreased with increasing salinity of the irrigation water. The reduction in ETc was significant from day after thinning (DAT) 49 onwards and increased over time with continuous saline irrigation. Increased salinity significantly reduced the leaf area index (LAI) and leaf area duration (LAD). A reduction in marketable fruit yield resulted from the lower mean weight of fruits, while the small decrease in the number of fruits per plant was not significant. The harvest index (HI) significantly increased with increasing salinity of the irrigation water. Total soluble solids (TSS) increased significantly with increasing salinity of the irrigation water while no significant difference was observed in flesh hardness, despite the increasing trend with increasing salinity. As the irrigation water salinity rose, the number of seeds per fruit increased significantly while the unit weight decreased but not significantly. The fruit shape index (FSI) increased significantly with increasing salinity of the irrigation water, with the fruits tending to become spherical. The maximum mean seasonal electrical conductivity of the saturated soil paste EC without yield reduction (i.e., the salt tolerance threshold) was 2.7 dS·m-1 for the marketable yield. Above the salt tolerance threshold, the total yield was reduced by 12.7% per unit increase of soil salinity.
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Received: 25 April 2014
Published: 20 January 2015
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2015, Vol. 35 
