Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13448 |
Irrigating grazed pasture decreases soil carbon and nitrogen stocks | |
Mudge, Paul L.1; 39;Connell, Denis2 | |
2017-02-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:2 |
文章类型 | Article |
语种 | 英语 |
国家 | New Zealand |
英文摘要 | The sustainability of using irrigation to produce food depends not only on the availability of sufficient water, but also on the soil's response' to irrigation. Stocks of carbon (C) and nitrogen (N) are key components of soil organic matter (SOM), which is important for sustainable agricultural production. While there is some information about the effects of irrigation on soil C stocks in cropping systems, there is a paucity of such studies in pastoral food production systems. For this study, we sampled soils from 34 paired, irrigated and unirrigated pasture sites across New Zealand (NZ) and analysed these for total C and N. On average, irrigated pastures had significantly (P<0.05) less soil carbon (C) and nitrogen (N) than adjacent unirrigated pastures, with differences of 6.99 t C ha(-1) and 0.58 t N ha(-1) in the uppermost 0.3m. Differences in C and N tended to occur throughout the soil profile, so the cumulative differences increased with depth, and the proportion of the soil C lost from deeper horizons was large. There were no relationships between differences in soil C and N stocks and the length of time under irrigation. This study suggests SOM will decrease when pastures under a temperate climate are irrigated. On this basis, increasing the area of temperate pasture land under irrigation would result in more CO2 in the atmosphere and may directly and indirectly increase N leaching to groundwater. Given the large and increasing area of land being irrigated both in NZ and on a global scale, there is an urgent need to determine whether the results found in this study are also applicable in other regions and under different land management systems (e.g. arable). |
英文关键词 | agriculture drought food production grassland soil carbon soil nitrogen |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394343300041 |
WOS关键词 | NEW-ZEALAND ; ORGANIC-MATTER ; CLIMATE-CHANGE ; ROOT CARBON ; LAND-USE ; REQUIREMENTS ; MANAGEMENT ; NUTRIENT ; MINERALIZATION ; STABILIZATION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17537 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Landcare Res, Private Bag 3127, Hamilton 3240, New Zealand; 2.AgResearch, Lincoln Res Ctr, Private Bag 4749, Christchurch 8140, New Zealand; 3.Univ Waikato, Sch Sci, Private Bag 3105, Hamilton 3240, New Zealand; 4.Univ Waikato, Environm Res Inst, Private Bag 3105, Hamilton 3240, New Zealand |
推荐引用方式 GB/T 7714 | Mudge, Paul L.,39;Connell, Denis. Irrigating grazed pasture decreases soil carbon and nitrogen stocks[J]. GLOBAL CHANGE BIOLOGY,2017,23(2). |
APA | Mudge, Paul L.,&39;Connell, Denis.(2017).Irrigating grazed pasture decreases soil carbon and nitrogen stocks.GLOBAL CHANGE BIOLOGY,23(2). |
MLA | Mudge, Paul L.,et al."Irrigating grazed pasture decreases soil carbon and nitrogen stocks".GLOBAL CHANGE BIOLOGY 23.2(2017). |
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