干旱区生态环境知识资源中心(Arid): Stable oxygen isotope analysis of the water uptake mechanism via the roots in spring maize under the ridge-furrow rainwater harvesting system in a semi-arid region

Arid

DOI	10.1016/j.agwat.2021.106879
	Stable oxygen isotope analysis of the water uptake mechanism via the roots in spring maize under the ridge-furrow rainwater harvesting system in a semi-arid region
	Xu, Jing; Guo, Ziyan; Li, Zhimin; Li, Fangjian; Xue, Xuanke; Wu, Xiaorong; Zhang, Xuemei; Li, Hui; Zhang, Xudong; Han, Qingfang
通讯作者	Han, QF (corresponding author), Northwest A&F Univ, Coll Agron, Minist Agr & Rural Affairs, Key Lab Crop Physioecol & Tillage Sci Northwester, Yangling 712100, Shaanxi, Peoples R China.
来源期刊	AGRICULTURAL WATER MANAGEMENT
ISSN	0378-3774
EISSN	1873-2283
出版年	2021
卷号	252
英文摘要	Root water uptake plays an important role in plant growth and the water cycle in ecosystems, and it is greatly affected by the morphology and spatial distribution of the roots. The ridge-furrow rainwater harvesting system (RFRH) is an effective strategy in semi-arid regions, but the mechanism of spring maize root water uptake remains unclear. Therefore, we conducted a two-year experiment in a semi-arid region of northwestern China to study the soil water content (SWC), spring maize root morphology and spatial distribution, and water uptake in different root zones using the 18-oxygen stable isotope (818O) under RFRH. The root zones were investigated in three locations around a maize plant: (1) ridge (RF-R), (2) border of the ridge and furrow (RF-B), and (3) furrow (RF-F). The results showed that RFRH changed the symmetrical soil water distribution in the maize rows and significantly increased the SWC in RF-F, especially in the shallow soil profile (0-60 cm), which where the enhanced root growth in the shallower soil layers (0-40 cm) under RF-F and the roots reached deeper into the soil under RF-R. The roots reached deeper to absorb water as they developed vertically in the advanced of growth stage. The contributions of different soil layers to the total soil water uptake in the root zone exhibited a similar trend to the root proportion according to 818O analysis. In the filling stage, the maize roots under RF-R and RF-B acquired 64.1% and 65.8% of the water from the 40-60 cm layer in 2018, respectively, and 74.5% and 65.5% in 2019, whereas the amounts under RF-F were 49.9% and 27.6% from the 40-60 cm layer, and 30% and 53.9% from the 20-40 cm layer in 2018 and 2019. Thus, spring maize root water uptake was positively correlated with the root distribution, and the roots under the furrow absorbed more water from the shallower soil layers than the ridge, and less from the deeper soil layers than the ridge.
英文关键词	Mechanism Ridge-furrow rainwater harvesting system Root water uptake Spring maize Stable oxygen isotope
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000652843200007
WOS关键词	SOIL-WATER ; WINTER-WHEAT ; UPTAKE PATTERNS ; MIXING MODELS ; SUMMER MAIZE ; MOVEMENT ; PRODUCTIVITY ; MORPHOLOGY ; IRRIGATION ; RAINFALL
WOS类目	Agronomy ; Water Resources
WOS研究方向	Agriculture ; Water Resources
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349344
作者单位	[Xu, Jing; Guo, Ziyan; Li, Zhimin; Li, Fangjian; Xue, Xuanke; Wu, Xiaorong; Zhang, Xuemei; Li, Hui; Zhang, Xudong; Han, Qingfang] Northwest A&F Univ, Coll Agron, Minist Agr & Rural Affairs, Key Lab Crop Physioecol & Tillage Sci Northwester, Yangling 712100, Shaanxi, Peoples R China; [Xu, Jing; Guo, Ziyan; Li, Zhimin; Li, Fangjian; Xue, Xuanke; Wu, Xiaorong; Zhang, Xuemei; Li, Hui; Zhang, Xudong; Han, Qingfang] Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jing,Guo, Ziyan,Li, Zhimin,et al. Stable oxygen isotope analysis of the water uptake mechanism via the roots in spring maize under the ridge-furrow rainwater harvesting system in a semi-arid region[J]. 西北农林科技大学,2021,252.
APA	Xu, Jing.,Guo, Ziyan.,Li, Zhimin.,Li, Fangjian.,Xue, Xuanke.,...&Han, Qingfang.(2021).Stable oxygen isotope analysis of the water uptake mechanism via the roots in spring maize under the ridge-furrow rainwater harvesting system in a semi-arid region.AGRICULTURAL WATER MANAGEMENT,252.
MLA	Xu, Jing,et al."Stable oxygen isotope analysis of the water uptake mechanism via the roots in spring maize under the ridge-furrow rainwater harvesting system in a semi-arid region".AGRICULTURAL WATER MANAGEMENT 252(2021).