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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