Absorption of Glycine by Three Agricultural Species Under Sterile Sand Culture ConditionsEnglish Full Text

WU Liang-Huan1, MO Liang-Yu1, FAN Zhi-Lian1, TAO Qin-Nan1 and ZHANG Fu-Suo2 1MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310029 (China). 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.

Keywords：

Chinese cabbage （Brassica campestris L.）; glycine-N; mung bean （Phaseolus radiatus L.）; NH4+-N; wheat （Triticum aestivum L.）;

Series：
(D) Agriculture
Subject：
Agronomy; Crop
Classification Code：
S311;

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