Appropriate nitrogen addition regulates reproductive strategies of Leymus chinensis

文献类型： 外文期刊

第一作者： Liu, Li

作者： Liu, Li;Zuo, Shining;Ma, Mingyan;Huang, Ding;Li, Jiahuan;Guo, Lizhu

作者机构：

关键词： Nitrogen addition; Grassland management; Reproductive strategies; Leymus chinensis; Ecological conservation

期刊名称：GLOBAL ECOLOGY AND CONSERVATION （ 影响因子：3.38； 五年影响因子：4.167 ）

ISSN： 2351-9894

年卷期： 2021 年 27 卷

页码：

收录情况： SCI

摘要： Nitrogen(N) addition can significantly improve the aboveground productivity of plants. The responses of reproductive strategies to N addition remain elusive for Leymus chinensis. Here, we examined the vegetative growth and clonal and sexual reproduction of a rhizome clonal grass, Leymus chinensis (Trin.) Tzvel, in response to N addition rates of 0, 2, 4, 8, 16, 32, and 64 g N m(-2). N addition altered the reproductive strategy and allometric growth patterns of L. chinensis along the N addition gradient. N addition generally promoted higher investment in the biomass of vegetative and clonal organs, and a lower investment in sexual organs. N addition rates of 16 and 32 g N m(-2) were key thresholds; 16 g N m(-2) was the optimal rate for sexual reproduction and 32 g N m(-2) was optimal for vegetative growth and clonal re-production. At an addition rate of 16 g N m(-2), the sexual reproductive capacity of L. chinensis was highest. Resource allocation to sexual reproduction increased with N addition, but decreased at rates > 16 g N m(-2). The growth and clonal reproduction of L. chinensis decreased at N concentrations > 32 g N m(-2). Our findings highlight that the reproductive strategy of L. chinensis varies with N addition rate, and the growth, sexual reproduction, and clonal reproduction strategies of L. chinensis are plastic, which has important implications for production. (C) 2021 The Author(s). Published by Elsevier B.V.

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