干旱区生态环境知识资源中心(Arid): Soil organic carbon in sandy soils: A review

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DOI	10.1016/bs.agron.2019.07.004
	Soil organic carbon in sandy soils: A review
	Yost, Jenifer L.; Hartemink, Alfred E.
通讯作者	Hartemink, AE (corresponding author), Univ Wisconsin, Dept Soil Sci, FD Hole Soils Lab, Madison, WI 53706 USA.
来源期刊	ADVANCES IN AGRONOMY, VOL 158
ISSN	0065-2113
EISSN	2213-6789
出版年	2019
卷号	158 页码:217-310
英文摘要	Sandy soils cover approximately 900 million ha worldwide particularly in arid and semi-arid regions. There are extensive areas of sandy soils under cultivation, but the soil fertility is often low and dependent on the levels of soil organic carbon (SOC). Here, we review SOC levels of sandy soils across the world using pedon databases, data from literature, and three detailed case studies. Pedons were selected from five major databases and the pedons had a minimum of 850g sand kg(-1) in the top 30cm. Sandy soils occur in all climates and several soil orders (mainly Alfisols, Entisols, Inceptisols, Spodosols, Ultisols). Soil organic carbon was highest in sandy soils of the temperate and cold zones (mean 19gkg(-1)), and lowest in soils of the arid zone (<5g kg(-1)). The SOC concentrations was highest when mean annual precipitation was between 700 and 1300mm, and SOC was lower when annual temperatures were higher. Sandy soils under forest had on average 23g SOC kg(-1) whereas the soils under prairie had on average 7g SOC kg(-1). Spodosols had the highest SOC concentrations, and SOC was lowest in Aridisols. The average A-horizon thickness of sandy soils was 17cm, and it was thickest in Mollisols, and thinnest in Inceptisols. The thickness of the A-horizon is important since most of the SOC of sandy soils is found in the A-horizon. Over 32,000 papers have been published on sandy soils since 1914, and in the past 10 years, some 1000-1800 papers are annually published on sandy soils. We extracted papers since the early 1990s, and grouped them by continent, land cover, soil order, and focus of the research. Three soil-forming processes have been extensively studied in relation to SOC and sandy soils: podzolization, humification, and melanization. Several studies found that SOC increases when sandy soils were fertilized, but sandy soils become more water repellent with an increase in SOC and a decrease in pH. From published literature, it was found that SOC was high in sandy soils under forest (<= 90g kg(-1)) and grassland (<= 187gk(-1)), and low in sandy soils under agriculture (<= 38g kg(-1)) or under shrub (<= 36gkg(-1)). Lastly, we present case studies from Southern Africa, Western Europe, and North America. Sandy soils cover about 273 million ha in Africa, and SOC rarely exceeds 10g SOC kg(-1) in the top 30cm. The plaggen soils of Western Europe have high SOC (up to 66g kg(-1)) due to the long-term additions of sod, litter, manure, and sea sand to increase the soil fertility. In the Wisconsin Central Sand Plains, SOC stocks in soils under agriculture were high (60Mg ha(-1)) compared to the soils under forest (15Mg ha(-1)) and grassland (25Mg ha(-1)). Available water capacity increased with an increase in SOC. From this review, we conclude that sandy soils are found throughout the world, and the sandy soils in the temperate and cold zones have the highest SOC levels. In sandy soils, soil organic carbon increased the cation exchange capacity and lowered the bulk density. Soil organic carbon levels can be significantly increased in sandy soils under agriculture when amendments are made in combination with irrigation.
类型	Review ; Book Chapter
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000516525800005
WOS关键词	CATION-EXCHANGE CAPACITY ; LAND-USE CHANGES ; MICROBIAL COMMUNITY STRUCTURE ; BULK-DENSITY RELATIONSHIPS ; PARTICLE-SIZE FRACTIONS ; SCOTS PINE ECOSYSTEM ; WATER REPELLENCY ; N MINERALIZATION ; PLAGGEN SOILS ; CHEMICAL-COMPOSITION
WOS类目	Agronomy ; Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369452
作者单位	[Yost, Jenifer L.; Hartemink, Alfred E.] Univ Wisconsin, Dept Soil Sci, FD Hole Soils Lab, Madison, WI 53706 USA
推荐引用方式 GB/T 7714	Yost, Jenifer L.,Hartemink, Alfred E.. Soil organic carbon in sandy soils: A review[J],2019,158:217-310.
APA	Yost, Jenifer L.,&Hartemink, Alfred E..(2019).Soil organic carbon in sandy soils: A review.ADVANCES IN AGRONOMY, VOL 158,158,217-310.
MLA	Yost, Jenifer L.,et al."Soil organic carbon in sandy soils: A review".ADVANCES IN AGRONOMY, VOL 158 158(2019):217-310.