水肥耦合对硒砂瓜产量和品质的影响.

[Objective] In order to investigate the suitable water-fertilizer combination pattern for selenium melon grown under drip irrigation in the arid zone of central Ningxia. [Method] The local main cultivar "Jincheng 5" was used as the test material, and three irrigation gradients and three fertilizer levels were set up, with a total of nine treatments, to determine the growth indexes of selenium squash, fruit longitudinal and transverse diameters, yields and quality indexes of selenium squash under different treatments. The key indexes were screened by principal component analysis to evaluate the combined effects of irrigation volume and fertilizer application on the indexes of selenium melon. [Result] The results show that irrigation volume, fertilizer application rate, and water-fertilizer interaction effect all affected the yield and quality of selenium melon to different degrees, and the water-fertilizer interaction effect was higher than that of irrigation volume and fertilizer application rate. The W2F2 treatment significantly increased the yield of selenium melon, the content of central and marginal soluble solids, reduced the middle and marginal differences, and made the selenium melon sweetness uniform, which improved the taste and quality of selenium melon. Based on the principal component analysis, 12 indicators of quality index, yield, irrigation water use efficiency and fertilizer bias productivity were converted into 2 independent composite indicators, whose cumulative contribution was as high as 89.244%. The W2F2 treatment had the highest composite score of water-fertilizer coupling effect. [Conclusion] The suitable water-fertilizer combination pattern for selenium melon in the central arid zone of Ningxia was an irrigation watering rate of 210 m³/hm² and a fertilizer application rate of 300 kg/hm². [ABSTRACT FROM AUTHOR]