Variations of growth, nitrogen accumulation and nitrogen use efficiency among 18 willow clones under two nitrogen regimes

文献类型： 外文期刊

第一作者： Yang, Weidong

作者： Yang, Weidong;Zhu, Zhiqiang;Zhao, Fengliang;Ding, Zheli;Rafiq, Muhammad Tariq;Wang, Yuyan;Zhang, Xincheng;Yang, Xiaoe;Zhu, Zhiqiang;Zhao, Fengliang;Ding, Zheli

作者机构：

关键词： Salix spp.;Biomass production;Nitrogen-use efficiency;Clonal variation;Phytoremediation

期刊名称：AGROFORESTRY SYSTEMS （ 影响因子：2.549； 五年影响因子：2.517 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Willows (Salix spp.) have excellent capacity for acquiring nutrients, and are widely used for removing excess nutrients in wastewater purification system. In this study, 18 willow clones were evaluated in terms of growth parameters, nitrogen (N) accumulation and N use efficiency under two N regimes (low N and high N) with a sand culture system. Clonal differences were observed in biomass production, relative growth rate, N accumulation and use efficiency under two N regimes, which were contributed to the clone level. For all clones, nitrogen use efficiency was lower under high N condition than under low N condition. Nitrogen removal efficiency differed by 7-fold (low N regime) and 10-fold (high N regime) based on shoot N contents between the lowest and the highest clone. Among all the clones, J799 had the highest N content in shoots, showing largest N removal potential. These results confirmed that growth analysis and nutrient use strategy are efficient method of selecting Salix clones for improving the N removal potential.

分类号： S7

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