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| Effects of Enhanced UV-B Radiation on N Accumulation of Two Traditional Rice Colonies in Yuanyang Terraces Under Field Conditions |
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| KeyWord:UV-B radiation; Yuanyang terraces; traditional rice; nitrogen; nutrients accumulation |
| Author Name | Affiliation | | LIU Chang | College of Resource and Environment, Yunnan Agricultural University | | HE Yong-mei | College of Resource and Environment, Yunnan Agricultural University | | ZU Yan-qun | College of Resource and Environment, Yunnan Agricultural University | | LI Yuan | College of Resource and Environment, Yunnan Agricultural University | | TANG You-fu | Comprehensive Agricultural Service Center of Xinjie Town |
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| Abstract: |
| In 2011, field experiments were conducted to understand the effects of enhanced UV-B radiation（2.5 kJ·m-2, 5.0 kJ·m-2 and 7.5 kJ·m-2） on available N and total N in paddy soil, contents and accumulation of nitrogen of traditional rice colonies-Baijiaolaojing（BJLJ） and Yuelianggu（YLG） in Yuanyang terraces. The results showed that：under enhanced UV-B radiation condition, the biomass of leaves, stems, roots and spikes of two traditional rice colonics decreased significantly, especially the lowest biomass under TR7.5 treatment. The contents of N in each part of two traditional rice colonics increased significantly. The accumulation of N in BJLJ increased significantly. The accumulation of N in YLG increased firstly with the greatest accumulation under TR5.0 treatment, and then decreased under TR7.5 treatment. In summary, the contents of soil available and total N contents under enhanced UV-B radiation decreased and the output of N from paddy soil of two traditional rice colonics increased, comparing with decrease in storage of N in paddy soil. |
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