Pedosphere 15(3): 286--292, 2005
ISSN 1002-0160/CN 32-1315/P
©2005 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Absorption of glycine by three agricultural species under sterile sand culture conditions |
WU Liang-Huan 1, MO Liang-Yu1, FAN Zhi-Lian1, TAO Qin-Nan1 and ZHANG Fu-Suo2 |
1 MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). E-mail: lhwu@zju.edu.cn
2 College of Resources and Environment, China Agricultural University, Beijing 100094 (China) |
| ABSTRACT |
| Seedlings of wheat (Triticum aestivum L.), Chinese cabbage (Brassica campestris L.) and mung bean (Phaseolus radiatus L.) were grown for 30 days in sterile sand media with 6 N treatments, i.e. NH4+-N,glycine-N,3 different ratios of glycine-N:NH4+-N (NH4+-N was labeled with 15N) and a control receiving no N, to assess the importance of amino acids in excessive N nutrition along with inorganic N interactions. The contribution of nitrogen derived from glycine-N to total plant N was investigated. The total plant N of the three species treated with N was significantly greater (P < 0.05) than the control treatment. Also, seedlings from all the three species had significantly more total N as NH4+-N (P < 0.05) than at least two of the four treatments with glycine-N. However, for all species, differences in total N among treatments with a mixture of glycine-N and NH4+-N were mostly not significant. The contribution of N derived from glycine-N to plant total N content for all species increased with increasing glycine-N:NH4+-N ratio in the treatment solution. These results indicated that agricultural plants could effectively use organic nitrogen from organic nitrogen sources (e.g., glycine) and from organic and inorganic N mixtures (e.g., a glycine-N and NH4+-N mix). There were also genotypic differences in glycine-N and NH4+-N uptake by agricultural species. |
| Key Words: Chinese cabbage (Brassica campestris L.), glycine-N, mung bean (Phaseolus radiatus L.), NH4+-N, wheat (Triticum aestivum L.) |
| Citation: Wu, L. H., Mo, L. Y., Fan, Z. L., Tao, Q. N. and Zhang, F. S. 2005. Absorption of glycine by three agricultural species under sterile sand culture conditions. Pedosphere. 15(3): 286-292. |
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