Author:
Ouyang Zan,Tian Juncang,Yan Xinfang,Yang Zhenfeng
Abstract
AbstractTo study the influence mechanism of micro-nano oxygenated irrigation (MNOI) on greenhouse fruit cucumber in arid and semi-arid cold regions, the yield and quality of greenhouse fruit cucumber were evaluated and verified based on 2 years of observation data. Taking fruit cucumber in Ningxia solar greenhouse as the research object, three dissolved oxygen (DO) levels of MNOI (DO; 6, 7.5, and 9 mg L−1, O1, O2, and O3, respectively) and non-oxygenated irrigation (CK, 4 mg L−1) were set up as the control treatment. Through comparative design, the influence mechanism of different levels of aerobic irrigation on the yield and quality of greenhouse fruit cucumber was studied. The main indicators of fruit cucumber yield and quality increased with dissolved oxygen in irrigation water from 4 to 9 mg L−1. In spring–summer (autumn–winter), compared with CK, the leaf area index (LAI) and net photosynthetic rate (A) increased by 28.83% (28.77%) and 44.90% (35.00%), respectively, and Vitamin C, soluble protein, soluble sugar, soluble solids and total acid content increased by 100.00% (51.88%), 37.78% (61.11%), 34.17% (54.17%), 37.07% (78.72%) and 26.92% (30.67%) respectively, while nitrate content decreased by 44.88% (51.15%), and dry matter accumulation (DMA), soil respiration rate (SRR), microbial carbon (MC), and microbial nitrogen (MN) increased by 49.81% (127.25%), 55.22% (110.34%), 117.50% (90.91%) and 70.37% (74.42%) respectively, and yield, irrigation water use efficiency (IWUE) and soil oxygen content (SO) increased by 22.47% (28.04%), 22.39% (28.05%) and 33.21% (35.33%) respectively. A model of DO in irrigation water and SO was established and the applicability of the model was verified with an average relative error of 2% (less than 5%). MNOI increased SO and soil enzyme activity, enriched soil microorganisms, improved soil microenvironment, promoted water nutrient uptake and growth of root system, increased chlorophyll, photosynthesis and DMA, which improved fruit cucumber yield and quality, and the better DO concentration in irrigation water is 9 mg L−1. The research results provide theoretical support for regulating soil water, fertilizer and air environment, and at the same time, provide feasible ways to improve the quality and efficiency of crops in arid and semi-arid cold regions.
Funder
Natural Science Foundation of Changsha
Scientific Research Project of Hunan Provincial Education Department
Water Resources Science and Technology Project of Hunan Province
Ningxia Hui Autonomous Region Key Research and Development Plan Major Project
National Natural Science Foundation of China
Ningxia Hui Autonomous Region Colleges and Universities First-Class Subject Construction Project
Publisher
Springer Science and Business Media LLC
Reference65 articles.
1. Silberbush, M., Gornat, B. & Goldberg, D. Effect of irrigation from a point source (trickling) on oxygen flux and on root extension in the soil. Plant Soil 52, 507–514. https://doi.org/10.1007/BF02277946 (1979).
2. Mustroph, A. & Albrecht, G. Tolerance of crop plants to oxygen deficiency stress: Fermentative activity and photosynthetic capacity of entire seedlings under hypoxia and anoxia. Physiol. Plant. 117, 508–520. https://doi.org/10.1034/j.1399-3054.2003.00051.x (2003).
3. Liu, Y., Li, T., Sun, Z. & Chen, Y. Effects of root-zone hypoxia stress on the photosynthesis, yield and quality of muskmelon. Acta Hortic. Sin. 36, 1465–1472 (2009).
4. Kang, Y.-Y., Guo, S.-R. & Duan, J.-J. Effects of root zone hypoxia on respiratory metabolism of cucumber seedlings roots. Chin. J. Appl. Ecol. 19, 583–587 (2008).
5. Colmer, T. D. Aerenchyma and an inducible barrier to radial oxygen loss facilitate root aeration in upland, paddy and deep-water rice (Oryza sativa L.). Ann. Bot. 91, 301–309. https://doi.org/10.1093/aob/mcf114 (2003).