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| DOI： |
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| Impact of Oxygen Content in the A Horizon on Growth of Cucumber Leaves |
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SHEN Wei, HU Deyong, YAO Bangsong, XIAO Weihua, ZHANG Licheng, HUANG Zhengzhong, CHENG Feng, RUAN Sangui
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College of Engineering, Hunan Agricultural University, Changsha 410128, China
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| Abstract: |
| This paper investigated the impact of oxygen content in different depths in the A horizon on traits and biochemical characteristics of cucumber leaves during different growth stages.Pot experiment with four treatments was conducted in a greenhouse: A2 -oxigation after every two hours，A4 -oxigation after every four hours，A8 - oxigation after every eight hours，CK-without oxigation. In each treatment we measured the oxygen content in different depths in the A horizon, as well as the contents of chlorophyll, soluble sugar, soluble protein and photosynthetic charateristics(net photosynthetic rate, stomatal conductance, intercellular CO2, transpiration rate) in the leaves. The results showed that，in the seeding stage, the contents of chlorophyll, soluble sugar, soluble protein and the photosynthetic characteristics were in the order of A4 > A2 > A8 > CK. However, in the flowering and the mature stages, the orders of these contents changed to A4 > A2 > A8 > CK. That is, during the seeding stage, more oxygen in the A horizon does not help the plants, while during the flowering stage and the mature stage, more oxygenin the A horizon benefits the leaves. There was a significant positive correlation between oxygen content and the contents of chlorophyll content, soluble sugar, soluble protein and the net photosynthetic rate in the leaves. |
| Key words: oxygen content; leaves growth; chlorophyll; solublesugar; soluble protein; photosynthetic characteristics |
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