干旱区生态环境知识资源中心(Arid): Tritium and trees: A bomb peak perspective on soil water dynamics in semi-arid apple orchards

Arid

DOI	10.1016/j.catena.2023.107474
	Tritium and trees: A bomb peak perspective on soil water dynamics in semi-arid apple orchards
	Tao, Ze; Evaristo, Jaivime; Wang, Xia; Chen, Guangjie; Si, Bingcheng; Siddique, Kadambot H. M.
通讯作者	Evaristo, J
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2023
卷号	232
英文摘要	Understanding the relationship between agroforest age and soil water dynamics is crucial for effective land and water resources management. However, the complexities of these dynamics, such as soil water recharge and depletion, hamper in-depth understanding, particularly in water-scarce regions. In this study, we examined soil water recharge and depletion in relation to the stand age of apple trees, a widely planted and representative deep-rooted agroforest, over four years in a semi-arid region on China's Loess Plateau (CLP). We collected soil cores to >20 m depth from four apple orchards (referred to as 'agroforests') with variable stand ages (established in 2008, 2005, 1998, and 1994). For comparison, we selected adjacent cropland as land use prior to agroforestry practices ('control'). We measured soil water content and tritium distributions to model soil water dynamics and estimate water ages across different soil profiles. Our results show that recharge amounts (and depths) in shallow soils were 298.4 mm (7 m), 303.4 mm (6.6 m), 300.6 mm (5.4 m), and 483.1 mm (7.6 m), whereas deep soils had net depletions of 111.1 mm, 391.9 mm, 192.8 mm, and 108.9 mm for AP2008, AP2005, AP1998, and AP1994, respectively. The tritium peak depths, which indicate the 1963 bomb peak depth, significantly differed between agroforested and non-agroforested plots. In particular, agroforestation reduced the seepage velocity of soil water over 20 years. Furthermore, our tritium tracer water age model suggests that the age of transpired deep soil water exceeded 200 years in the oldest orchard. These findings highlight a complex interaction between newly infiltrated water and existing water, possibly due to variations in soil pore size distributions. The results of this study offer valuable insights into the ecohydrological impacts of agroforestation on the CLP and in similar climatic regions.
英文关键词	Agroforest stand age Soil water recharge Soil water depletion Tritium Transpiration water age Agroforests
类型	Article
语种	英语
开放获取类型	hybrid, Green Published
收录类别	SCI-E
WOS记录号	WOS:001070755100001
WOS关键词	LOESS PLATEAU ; HYDRAULIC CONDUCTIVITY ; VEGETATION TYPES ; CHINA ; AFFORESTATION ; MOISTURE ; FOREST ; GROUNDWATER ; RECHARGE ; REGION
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395713
推荐引用方式 GB/T 7714	Tao, Ze,Evaristo, Jaivime,Wang, Xia,et al. Tritium and trees: A bomb peak perspective on soil water dynamics in semi-arid apple orchards[J],2023,232.
APA	Tao, Ze,Evaristo, Jaivime,Wang, Xia,Chen, Guangjie,Si, Bingcheng,&Siddique, Kadambot H. M..(2023).Tritium and trees: A bomb peak perspective on soil water dynamics in semi-arid apple orchards.CATENA,232.
MLA	Tao, Ze,et al."Tritium and trees: A bomb peak perspective on soil water dynamics in semi-arid apple orchards".CATENA 232(2023).