| Cite this article: | 马新超,马国财,王海瑞,等.水氮耦合对温室沙培黄瓜土壤剖面水盐氮运移及产量的影响[J].灌溉排水学报,2022,():-. |
| Ma Xinchao,Ma Guocai,Wang Hairui,et al.水氮耦合对温室沙培黄瓜土壤剖面水盐氮运移及产量的影响[J].灌溉排水学报,2022,():-. |
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| This article has been：Browse 1559Times Download 0Times |
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| DOI：10.13522/j.cnki.ggps.2021556 |
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| Effects of water-nitrogen coupling on water, salt and nitrogen transport and yield of cucumber soil profile in sand culture of greenhouse |
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Ma Xinchao1, Ma Guocai2, Wang Hairui3, Zhang Kaihao4, Yang Hongji4, Gao Yaning4, Wang Xufeng5, Xuan Zhengying4
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1.Tarim University;2.Analysis and Testing Center, Tarim University;3.College of Water Conservancy and Civil Engineering, Tarim University;4.College of Horticulture and Forestry, Tarim University;5.College of Mechanical Electrification Engineering, Tarim University
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| Abstract: |
| 【Background】A reasonable water and nitrogen operation plan can effectively avoid nitrogen fertilizer leaching and soil secondary salinization, improve the yield of cucumber in greenhouse sand culture, increase economic benefits, reduce resource waste and environmental pollution, and have important guiding significance for the production of cucumber in greenhouse sand culture.【Objective】 To explore the distribution and migration characteristics of water, salt and nitrogen in soil profile and the difference of yield of cucumber under different water and nitrogen application systems. 【Method】 A field experiment of cucumber coupling with water and nitrogen in sandy soil was carried out by using secondary saturated D-optimal design. Seven treatments were set up in the experiment, and each treatment was repeated three times. The soil moisture content, EC, nitrate nitrogen content and ammonium nitrogen content of four soil layers in each treatment were measured every 20 days, and the yield of cucumber was statistically analyzed. The effects of coupling of water and nitrogen on the transport of water, salt and nitrogen and yield of cucumber soil profile in greenhouse sand culture were studied. 【Result】 The results showed that irrigation level was the main factor affecting soil moisture content, and the distribution of soil moisture on the soil profile showed an obvious trend of moisture migration to the depth. Although drip irrigation under membrane has the function of "salt suppression and salt pressure", avoiding excessive irrigation and nitrogen application is an effective measure to prevent salt accumulation. The nitrate nitrogen and ammonium nitrogen in the soil were easily transported with water, and there was a threshold for absorption of ammonium nitrogen by cucumber roots. With the increase of irrigation level and nitrogen application rate, cucumber yield of sand culture showed a parabolic trend of increasing first and then decreasing, which was consistent with the law of diminishing returns. 【Conclusion】 Under the experimental conditions, considering the distribution and migration of water, salt and nitrogen in soil profile, cucumber yield, water and nitrogen input and other factors, the recommended water-nitrogen coupling scheme is to set the upper and lower limits of irrigation at 80.20%~89.40% and 60%, and the nitrogen application rate at 623~917 kg/hm2. It can ensure a better soil growth environment for cucumber, rationally utilize water and fertilizer, reduce the risk of water and nitrogen leaching, avoid secondary salinization and harming cucumber growth, improve the utilization efficiency of water and fertilizer and cucumber yield, which can provide theoretical basis for the wide promotion of cucumber water and fertilizer integration in sand culture. |
| Key words: Cucumber; Sand culture. Soil moisture content; Nitrate nitrogen; Ammonium nitrogen; Yield |
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