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Response of root production to different restoration measures in a degraded meadow

文献类型： 外文期刊

作者： Cui, Meng 1 ; Wu, Hong-Hui 3 ; Jing, Chang-Qing 1 ; Zhang, Tao 5 ; Zhao, Shi-Ying 6 ; Gao, Ying-Zhi 1 ;

作者机构： 1.Xinjiang Agr Univ, Coll Grassland Sci, Key Lab Grassland Resources & Ecol Xinjiang Uygur, Urumqi 830052, Peoples R China

2.Chinese Acad Sci, State Key Lab Vegetat & Environm Change, Inst Bot, Beijing 100093, Peoples R China

3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

4.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr & Rural Affairs, Key Lab Arable Land Qual Monitoring & Evaluat, Beijing 100081, Peoples R China

5.Northeast Normal Univ, Key Lab Vegetat Ecol, Jilin Songnen Grassland Ecosyst Natl Observat & Re, Minist Educ, Changchun 130024, Peoples R China

6.Songyuan Agr & Rural Bur, Songyuan 138000, Peoples R China

关键词： restoration measures; degraded meadow; root production; root turnover; root lifespan

期刊名称：JOURNAL OF PLANT ECOLOGY （ 影响因子：3.0； 五年影响因子：2.5 ）

ISSN： 1752-9921

年卷期： 2024 年 17 卷 3 期

页码：

收录情况： SCI

摘要： Belowground parameters, e.g. root production and dynamics, play a pivotal role in evaluating the restoration degree of degraded grasslands. However, it remains unclear how roots respond to the combined restoration measures. To investigate root responses to different restoration treatments, a field experiment was conducted in a degraded Songnen meadow from 2013 to 2014. The treatments included: free grazing (FG), no ploughing (NP), only ploughing (OP), ploughing and fertilizer (PF), ploughing and mulching (PM), ploughing with fertilizer and mulching (PFM). Our results showed the seasonal dynamics pattern of roots was a unimodal pattern, which mainly was influenced by precipitation rather than restoration measures. The impacts of different restoration measures on root production were dependent on precipitation. In 2013, compared with FG, only PFM significantly increased root production by 242.34% (0-10 cm) and 90.8% (10-20 cm), which was mainly attributed to the increase of aboveground net primary production, soil moisture and root numbers. However, restoration measures had minor effects on root production in 2014. Root turnover ranged from 0.47 to 0.78 yr(-1) and was not significantly changed by different restored measures. This is because the dominant annual species, Chloris virgata, exhibited relatively small changes in root turnover across different plots. Moreover, PFM improved soil conditions, leading to increased root lifespan and survival rate. Our results suggest that the combined measures are an effective way to accelerate belowground restoration in the degraded Songnen meadow.

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