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| Effect of Nitrogen Form Ratio on Yield and Quality of Facility Tomato with Substrate Culture |
| LIU Zhongliang1，GAO Junjie1*，CHEN Zhen1，YAN Weiqiang1，GU Duanyin1，GAO Luyang2，GUO Xinsong3 |
| 1Taian Academy of Agricultural Sciences，Taian 271000，Shandong，China；2Xinyangfeng Agricultural Technology Co.，Ltd.，Jingmen 448000，Hubei，China；3Shandong Nongda Fertilizer Technology Co.，Ltd.，Taian 271000，Shandong，China |
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Abstract Taking‘Luola’as test material and adopting trough planting cultivation method，this experiment set up 10 matching treatments of nitrate nitrogen，ammonium nitrogen and amide nitrogen to study the effects of different nitrogen form ratios on tomato leaf enzyme activity，fruit quality，yield and nitrogen agronomic efficiency under substrate cultivation．The results showed that the activities of nitrate reductase（NR）and glutamine synthetase（GS）in tomato leaf blades of all nitrogen forms proportioned treatment were higher than that of the contrasts．The highest NR activity under T1 was 53.26 μg · h-1 · g-1，which was 23.48% higher than that of the contrast．The suitable nitrogen form ratio could improve tomato fruit quality，increase yield and nitrogen agronomic efficiency．The yield under T5 was the highest for 197 151.90 kg · hm-2，having increased 25.23% than that of the contrast．Considering all indicators comprehensively，under this experiment condition T5（nitrate nitrogen∶ammonium nitrogen∶amide nitrogen = 1∶3∶5）performed better，with the highest tomato yield and better fruit quality．
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Received: 09 August 2022
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