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| Effects of Tea Genotypes on Soil Soluble Organic Nitrogen Compositions in Subtropical Tea Plantations |
| Received:January 05, 2015 |
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| KeyWord:subtropics;tea genotype;soluble organic nitrogen;composition |
| Author Name | Affiliation | E-mail | | ZHOU Bi-qing | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Lab of Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | CHEN Cheng-rong | School of Environment, Griffith University, Brisbane, Qld 4111, Australia | | | ZHANG Li-ming | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Lab of Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | YANG Wen-hao | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Lab of Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | MAO Yan-ling | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Lab of Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | | | XING Shi-he | College of Resource and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China
Key Lab of Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou 350002, China | fafuxsh@126.com |
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| Abstract: |
| To explore the effects of tea genotypes on soil soluble organic nitrogen(SON) compositions, two adjacent tea plantations grown with different tea genotypes(Huangjingui and Fuyun 6) with the same parent material(tuff residual deposits), soil type(Alliti-Udic Ferrosols), and landform(hilly slopes facing east) in mid-subtropics in Fujian were selected. Topsoil samples(0~15 cm) at upper, middle and lower positions of the slope in each tea plantation were collected in summer. The compositions and their concentrations of SON were analyzed using TOC-TN analyzer, Quickchem Automated Ion Analyzer, Automated Amino Acid Analyzer, Gas chromatograph and NMR Spectroscopy. Results showed that amino acids in topsoils of Huangjingui and Fuyun 6 plantations were 37.24% and 30.71% of total SON, respectively. Non-amino acids were the main SON fractions in two tea plantations. The content of total amino acids in Huangjingui topsoils was significantly higher than that in Fuyun 6 soils. Neutral amino acids were the dominant fraction of amino acids in both Huangjingui and Fuyun 6 plantations, accounting for 85.20% and 80.54% of the total amino acids, respectively. Neutral and sulfur amino acids in Huangjingui topsoils were significantly higher than those in Fuyun 6. The compositions of amino acids in both tea plantations were the same, but the concentrations of proline, phenylalanine, histidine, isoleucine, leucine, alanine, glycine and valine were 52.93%~100.00% higher in Huangjingui topsoils than in Fuyun 6. These findings indicated that tea genotype greatly influenced compositions of SON in tea plantation soil and non-amino acids were the dominant fraction of SON. Therefore, it is important to reveal the effects of tea genotypes on non-amino acid components of SON and their environmental implications in tea ecosystems. |
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