Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow

The understanding of belowground productivity restoration and biomass allocation is especially important for the restoration of salt-alkali-degraded meadows. Despite this, it remains unclear how belowground net primary productivity (BNPP) and biomass allocation respond to combined restoration measur...

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Autores principales:	Dongxue Tao, Taiping Chen, Yan Luo, Honghui Wu, Xinyu Wang, Jing Wang, Yingzhi Gao
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Enclosure Ploughing Mulching Nitrogen addition Combining restoration measures Net primary productivity Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/83719e99a5dd4576af1c021a90e39514
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spelling	oai:doaj.org-article:83719e99a5dd4576af1c021a90e395142021-12-01T04:58:22ZBelowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow1470-160X10.1016/j.ecolind.2021.108038https://doaj.org/article/83719e99a5dd4576af1c021a90e395142021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21007032https://doaj.org/toc/1470-160XThe understanding of belowground productivity restoration and biomass allocation is especially important for the restoration of salt-alkali-degraded meadows. Despite this, it remains unclear how belowground net primary productivity (BNPP) and biomass allocation respond to combined restoration measures. To assess the effects of different combined restoration measures on BNPP and biomass allocation, a field experiment was carried out in a salt-alkali-degraded meadow from 2012 to 2014. The restoration treatments included: free grazing (FG), enclosure with no-ploughing (E), enclosure with ploughing alone (EP), enclosure with ploughing and N addition (EPF), enclosure with ploughing and mulching (EPM), and enclosure with ploughing plus both N addition and mulching (EPFM). Our results across all three years showed that relative to FG, all the other restoration measures, whether single or combined, significantly increased aboveground net primary productivity (ANPP), BNPP and net primary productivity (NPP). The response of BNPP to different restoration measures was stronger than the ANPP response, resulting in a higher root fraction. The trends were clearer in the EPF, EPM and EPFM treatments, suggesting that more C was allocated to belowground roots with N addition and mulching. The strong increases in NPP and BNPP and belowground biomass allocation in the EPF, EPM and EPFM treatments were mainly due to significant increases in the density of important species (e.g. Chloris virgata and Puccinellia tenuiflora) and soil moisture, and strong decreases in soil pH and EC. Our findings demonstrate that vegetation cover, species richness and productivity (ANPP + BNPP) should be considered as important indicators when evaluating the recovery of severely degraded grassland. Our results further suggest that the combined measures, including enclosure and ploughing plus N addition and mulching, are effective ways to accelerate restoration in salt-alkali-degraded meadows.Dongxue TaoTaiping ChenYan LuoHonghui WuXinyu WangJing WangYingzhi GaoElsevierarticleEnclosurePloughingMulchingNitrogen additionCombining restoration measuresNet primary productivityEcologyQH540-549.5ENEcological Indicators, Vol 130, Iss , Pp 108038- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Enclosure Ploughing Mulching Nitrogen addition Combining restoration measures Net primary productivity Ecology QH540-549.5
spellingShingle	Enclosure Ploughing Mulching Nitrogen addition Combining restoration measures Net primary productivity Ecology QH540-549.5 Dongxue Tao Taiping Chen Yan Luo Honghui Wu Xinyu Wang Jing Wang Yingzhi Gao Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
description	The understanding of belowground productivity restoration and biomass allocation is especially important for the restoration of salt-alkali-degraded meadows. Despite this, it remains unclear how belowground net primary productivity (BNPP) and biomass allocation respond to combined restoration measures. To assess the effects of different combined restoration measures on BNPP and biomass allocation, a field experiment was carried out in a salt-alkali-degraded meadow from 2012 to 2014. The restoration treatments included: free grazing (FG), enclosure with no-ploughing (E), enclosure with ploughing alone (EP), enclosure with ploughing and N addition (EPF), enclosure with ploughing and mulching (EPM), and enclosure with ploughing plus both N addition and mulching (EPFM). Our results across all three years showed that relative to FG, all the other restoration measures, whether single or combined, significantly increased aboveground net primary productivity (ANPP), BNPP and net primary productivity (NPP). The response of BNPP to different restoration measures was stronger than the ANPP response, resulting in a higher root fraction. The trends were clearer in the EPF, EPM and EPFM treatments, suggesting that more C was allocated to belowground roots with N addition and mulching. The strong increases in NPP and BNPP and belowground biomass allocation in the EPF, EPM and EPFM treatments were mainly due to significant increases in the density of important species (e.g. Chloris virgata and Puccinellia tenuiflora) and soil moisture, and strong decreases in soil pH and EC. Our findings demonstrate that vegetation cover, species richness and productivity (ANPP + BNPP) should be considered as important indicators when evaluating the recovery of severely degraded grassland. Our results further suggest that the combined measures, including enclosure and ploughing plus N addition and mulching, are effective ways to accelerate restoration in salt-alkali-degraded meadows.
format	article
author	Dongxue Tao Taiping Chen Yan Luo Honghui Wu Xinyu Wang Jing Wang Yingzhi Gao
author_facet	Dongxue Tao Taiping Chen Yan Luo Honghui Wu Xinyu Wang Jing Wang Yingzhi Gao
author_sort	Dongxue Tao
title	Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
title_short	Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
title_full	Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
title_fullStr	Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
title_full_unstemmed	Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow
title_sort	belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded songnen meadow
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/83719e99a5dd4576af1c021a90e39514
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Belowground net primary productivity and biomass allocation in response to different restoration measures in a salt-alkali-degraded Songnen meadow

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