| Impact of water and nitrogen coupling on quality of greenhouse tomato with furrow irrigation under film |
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| DOI：10.7606/j.issn.1000-7601.2013.03.12 |
| Key Words: furrow irrigation under membrane water and nitrogen coupling tomato quality principal component analysis comprehensive evaluation |
| Author Name | Affiliation | | SHI Xiaohu | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest
Agriculture and Forestry University, Yangling 712100, China | | CAO Hongxia | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest
Agriculture and Forestry University, Yangling 712100, China | | DU Taisheng | China Agricultural University, Beijing 100083, China | | NIU Yunhui | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest
Agriculture and Forestry University, Yangling 712100, China | | WANG Xuemei | Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest
Agriculture and Forestry University, Yangling 712100, China |
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| Abstract: |
| Impact of water and nitrogen coupling on tomato
quality indicators(organie acids, soluble sugar, Ve, nitrate, sugar acid ratio)with furrow irrigation under film was studied in this paper by using multi-objective evaluation with principal component analysis. Two irrigation levels(1485m3·hm-2 and 2080 m3·hm-2)and three N levels(225 kg·hm-2,410 kg·hm-2 and 630 kg·hm-2)were used in this study. The results showed that irrigation and nitrogen
amount as a single factor, in combination with water and nitrogen interaction, affected tomato quality indicators in different degrees.Increasing irrigation amount improved tomato fruit organie acids, nitrate content; while excess or lack of nitrogen reduced tomato fruit soluble sugar content, Vc content, sugar acid ratio. Nitrate content in the fruit inereased with increase of nitrogen, decreased with increase of irrigation volume. By using multi-objective evaluation of tomato quality indicators with principle component analysis, we draw conclusion that low water medium nitrogen process(W1485N410)had highest colligate index, on other hand, high water high nitrogen proeess(W2080N630)had the lowest one. |
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