Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

Abstract Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but responses of plant growth and reproduction to multiple levels of nutrient enrichment remain unclear. In this study, a factorial field experiment was performed with manipulat...

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Autores principales:	Lei Su, Mengzhou Liu, Chengming You, Qun Guo, Zhongmin Hu, Zhongling Yang, Guoyong Li
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	nitrogen deposition nutrient availability phosphorus enrichment reproductive allocation seed number Stipa krylovii Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9287ff8f3c4e441b9f8acc418d2a5f3d
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spelling	oai:doaj.org-article:9287ff8f3c4e441b9f8acc418d2a5f3d2021-11-08T17:10:41ZNitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe2045-775810.1002/ece3.8185https://doaj.org/article/9287ff8f3c4e441b9f8acc418d2a5f3d2021-11-01T00:00:00Zhttps://doi.org/10.1002/ece3.8185https://doaj.org/toc/2045-7758Abstract Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but responses of plant growth and reproduction to multiple levels of nutrient enrichment remain unclear. In this study, a factorial field experiment was performed with manipulation of nitrogen (N) and phosphorus (P) availability to examine seed production of the dominant species, Stipa krylovii, in response to N and P addition in a temperate steppe. There were three levels of N and P addition in this experiment, including no N addition (0 g N m−2 year−1), low N addition (10 g N m−2 year−1), and high N addition (40 g N m−2 year−1) for N addition treatment, and no P addition (0 g P m−2 year−1), low P addition (5 g P m−2 year−1), and high P addition (10 g P m−2 year−1) for P addition treatment. Low N addition enhanced seed production by 814%, 1371%, and 1321% under ambient, low, and high P addition levels, respectively. High N addition increased seed production by 2136%, 3560%, and 3550% under ambient, low, and high P addition levels, respectively. However, P addition did not affect seed production in the absence of N addition, but enhanced it under N addition. N addition enhanced seed production mainly by increasing the tiller number and inflorescence abundance per plant, whereas P addition stimulated it by decreasing the plant density yet stimulating height of plants and their seed number per inflorescence. Our results indicate seed production is not limited by P availability but rather by N availability in the temperate steppe, whereas seed production will be increased by P addition when N availability is improved. These findings enable a better understanding of plant reproduction dynamics in the temperate steppe under intensified nutrient enrichment and can inform their improved management in the future.Lei SuMengzhou LiuChengming YouQun GuoZhongmin HuZhongling YangGuoyong LiWileyarticlenitrogen depositionnutrient availabilityphosphorus enrichmentreproductive allocationseed numberStipa kryloviiEcologyQH540-549.5ENEcology and Evolution, Vol 11, Iss 21, Pp 15020-15029 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nitrogen deposition nutrient availability phosphorus enrichment reproductive allocation seed number Stipa krylovii Ecology QH540-549.5
spellingShingle	nitrogen deposition nutrient availability phosphorus enrichment reproductive allocation seed number Stipa krylovii Ecology QH540-549.5 Lei Su Mengzhou Liu Chengming You Qun Guo Zhongmin Hu Zhongling Yang Guoyong Li Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
description	Abstract Previous studies have demonstrated changes in plant growth and reproduction in response to nutrient availability, but responses of plant growth and reproduction to multiple levels of nutrient enrichment remain unclear. In this study, a factorial field experiment was performed with manipulation of nitrogen (N) and phosphorus (P) availability to examine seed production of the dominant species, Stipa krylovii, in response to N and P addition in a temperate steppe. There were three levels of N and P addition in this experiment, including no N addition (0 g N m−2 year−1), low N addition (10 g N m−2 year−1), and high N addition (40 g N m−2 year−1) for N addition treatment, and no P addition (0 g P m−2 year−1), low P addition (5 g P m−2 year−1), and high P addition (10 g P m−2 year−1) for P addition treatment. Low N addition enhanced seed production by 814%, 1371%, and 1321% under ambient, low, and high P addition levels, respectively. High N addition increased seed production by 2136%, 3560%, and 3550% under ambient, low, and high P addition levels, respectively. However, P addition did not affect seed production in the absence of N addition, but enhanced it under N addition. N addition enhanced seed production mainly by increasing the tiller number and inflorescence abundance per plant, whereas P addition stimulated it by decreasing the plant density yet stimulating height of plants and their seed number per inflorescence. Our results indicate seed production is not limited by P availability but rather by N availability in the temperate steppe, whereas seed production will be increased by P addition when N availability is improved. These findings enable a better understanding of plant reproduction dynamics in the temperate steppe under intensified nutrient enrichment and can inform their improved management in the future.
format	article
author	Lei Su Mengzhou Liu Chengming You Qun Guo Zhongmin Hu Zhongling Yang Guoyong Li
author_facet	Lei Su Mengzhou Liu Chengming You Qun Guo Zhongmin Hu Zhongling Yang Guoyong Li
author_sort	Lei Su
title	Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
title_short	Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
title_full	Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
title_fullStr	Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
title_full_unstemmed	Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
title_sort	nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/9287ff8f3c4e441b9f8acc418d2a5f3d
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_version_	1718441493280063488

Nitrogen and phosphorus addition differentially enhance seed production of dominant species in a temperate steppe

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