文献类型： 外文期刊
作者： Liu, Li 1 ; Zuo, Shining 1 ; Ma, Mingyan 1 ; Li, Jiahuan 2 ; Guo, Lizhu 3 ; Huang, Ding 1 ;
作者机构： 1.China Agr Univ, Coll Grassland Sci & Technol, Beijing 100093, Peoples R China
2.Hort Coll Shenyang Agr Univ, Shenyang 110866, Peoples R China
3.Beijing Acad Agr & Forestry Sci, Beijing Res & Dev Ctr Grass & Environm, Beijing 100097, Peoples R China
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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