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- Title
亚适宜温光环境下不同硝铵比营养液对 黄瓜幼苗生长、氮吸收和代谢的影响
- Authors
张小翠; 刘玉梅; 白龙强; 贺超兴; 于贤昌; 李衍素
- Abstract
Cucumber (cv. Zhongnong 26) was used as material, the effects of NO3--N/NH4+-N ratios on growth and physiological characteristics of cucumber seedlings under suboptimal temperature and light intensity ( 18 °C/10 °C ,180 ± 20 μmol · m-2 · s-1 ) were studied. Total nitrogen in th* nutrient solution was equal and three NO3--N/NH4+-N ratios, 26; 2, 21; 7 and 14; 14, were applied as treatments. The results showed that cucumber treated by NO3--N/NH4+-N = 21 ;7 had the longest total root length, the biggest root volume and root surface area, and the maximum number of root tips. H -ATPase activity and relative expression of genes encoding nitrate transporter (NRT) and ammonium transporter (AMT) in cucumber roots were increased significantly by the treatment of NO3--N/NH4+-N = 21 :7. In addition, nitrate reductase (NR), glutamine synthetase (GS) and glutamate synthases (GOGAT) in cucumber leaves under the treatment of NO3--N/NH4+-N = 21;7 were higher. As a result, the nitrogen content and biomass of cucumber were significantly increased. Compared with the plants under the treatment of NO3--N/NH4+-N = 26;2 or 14; 14, cucumber seedlings under the* treatment of NO3--N/NH4+-N = 21 ;7 had the highest biomass and total dry mass (DM) which were increased by 14.0% and 19.3% respectively under suboptimal temperature and light intensity. In conclusion, under suboptimal environmental conditions, NO3--N/NH4+-N ratio could be adjusted to increase nitrogen absorption and metabolism of cucumber and alleviate the detrimental effects caused by suboptimal conditions and promoted the cucumber growth.
- Publication
Yingyong Shengtai Xuebao, 2016, Vol 27, Issue 8, p2527
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.201608.029