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| DOI：10.13522/j.cnki.ggps.20180398 |
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| The Efficacy of Oxygenation in Improving Growth and Nutrients Use Efficiency of Greenhouse Purple Eggplant |
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LEI Hongjun, WANG Luyang, PAN Hongwei, HU Shiguo
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School of Water Conservancy, North China University of Water Resources and Electric Power/Henan Key Laboratory of Water-saving Agriculture, Zhengzhou 450046, China
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| Abstract: |
| 【Objective】 Oxygenation has been proved effective in improving soil environment for crops to grow in less permeable soil, and the purpose of this paper is to test its effects on nutrient utilization and yield of purple eggplant under aerated subsurface drip irrigation.【Method】The plant was grown in greenhouse and we examined the efficacy of the aerated subsurface drip irrigation on three typical soils in Henan province: Zhengzhou yellow clay (YC), Luoyang clay loam (SCL) and Zhumadian sandy loam (HL). The water used in all irrigation was local groundwater. We investigated two oxygenation methods: aerating the irrigation water (AI) and adding hydrogen peroxide solution (HP) in the irrigation water, with conventional irrigation without oxygenation as the control (CK) 【Result】AI and HIP increased the photosynthetic rate by 19.66% and 8.49% for YC, 14.02% and 7.51% for SCL, 10.13% and 5.91% for HL, respectively, compared to CK. In addition, AI and HP improved root activity, thereby increasing nutrients uptake, crop yield and water use efficiency (P<0.05). Compared to CK, AI and HP increased i) nitrogen uptake by 136.16% and 65.43% for YC, 141.23% and 88.76% for SCL, 112.60% and 45.47% for HL; ii) crop yield by 46.85% and 28.49% for YC, 41.52% and 20.68% for SCL, 49.86% and 17.59% for H; and iii) water use efficiency by 44.59% and 27.38% (YC), 41.06% and 21.39% (SCL) 48.81% and 17.97% (H).【Conclusion】Aerating irrigation water had noticeable beneficial impact on root growth, photosynthetic rate, nutrient and water utilization efficiency and the ultimate yield in all the three tested soils, especially for the sandy loam. |
| Key words: Oxygenation; yield; photosynthesis; nutrient uptake efficiency; water use efficiency |
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