Soil properties and microbiome of annual and perennial cultivated grasslands on the Qinghai–Tibetan Plateau

Jianjun Cao; Hairu Wang; Nicholas M. HoldenJan F. AdamowskiAsim BiswasXiaofang ZhangQi Feng

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Soil properties and microbiome of annual and perennial cultivated grasslands on the Qinghai–Tibetan Plateau

机译：Soil properties and microbiome of annual and perennial cultivated grasslands on the Qinghai–Tibetan Plateau

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Abstract Efforts to enhance food, fibre, and forage yields and achieve global food security have included the conversion of natural grasslands to cultivated grasslands. The quantitative effects of a global shift in grassland management on soil properties and microbial communities critical to ecosystem function have remained largely unexplored, particularly on China's Qinghai–Tibetan Plateau. Accordingly, the distinct and contrasting effects of annual Avena grasslands (AAG) versus perennial Elymus nutans Griseb. cultivated grasslands (PEG) on the region's soil properties and microbiome were investigated in an effort to examine their contribution to maintaining soil carbon and nutrients. Across three sites per grassland type, soil moisture content (45.55%), soil organic carbon (48.97 g kg−1), soil total nitrogen (5.13 g kg−1), and soil ammonium nitrogen (298.32 mg kg−1) were 19%–32% greater at PEG sites than AAG sites, whereas soil pH (7.81), soil total phosphorus (0.44 g kg−1), and soil available phosphorus (0.81 mg kg−1) were 2%–31% lower. The AAG and PEG site soils had different bacterial and fungal β‐diversities but similar α‐diversities. The relative combined abundance of Gemmatimonadetes and Chytridiomycota, and that of Rozellomycota individually, were, respectively, higher and lower in AAG versus PEG site soils. This suggests that, on the Qinghai–Tibetan Plateau, contrasting grassland cultivation practices affect soil properties and microbes differently. Given the strong interaction between a soil and its microbiome, changes in a soil's microbial community structure can be expected to substantially alter soil function. This will have important ecological service implications, particularly in terms of carbon storage and water conservation in this ecologically fragile region.

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来源
《Land Degradation and Development》 |2021年第18期|5306-5321|共16页
作者
Jianjun Cao; Hairu Wang; Nicholas M. HoldenJan F. AdamowskiAsim BiswasXiaofang ZhangQi Feng;
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作者单位

Northwest Normal University;

Agriculture and Food Science Centre, University College Dublin;

University of GuelphUniversity of Chinese Academy of SciencesChinese Academy of SciencesMcGill University;

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原文格式 PDF
正文语种英语
中图分类土壤学;
关键词
alpine grassland; soil environment; soil microbial community; α‐Diversity of soil microbes; β‐Diversity of soil microbes;

Soil properties and microbiome of annual and perennial cultivated grasslands on the Qinghai–Tibetan Plateau

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