干旱区生态环境知识资源中心(Arid): 氢氧同位素示踪法探测新疆地区防护林和棉花体系水分来源与竞争

Arid

	氢氧同位素示踪法探测新疆地区防护林和棉花体系水分来源与竞争
其他题名	Application of hydrogen and oxygen isotopes to study the source of water and competition in shelter-forest-cotton systems in the Xinjiang Oasis
	郭辉 1; 赵英 2; 蔡东旭 1; 兰志龙 3; 雷加强2
来源期刊	生态学报
ISSN	1000-0933
出版年	2019
卷号	39 期号:18 页码:6642-6650
中文摘要	农田防护林能够防风固沙,但同时也会和农作物竞争水分,引起防护林体系水资源利用紧张。运用氧同位素焦点法与SIAR模型,量化分析新疆莫索湾地区不同生长季棉花与杨树防护林的主要水分来源区域,探究杨树对棉花水分利用的影响。结果表明:棉花在膜下滴灌方式下主要吸收表层土壤水,蕾期主要利用0-20 cm的土壤水,花铃期主要利用20-40 cm土壤水;而杨树在漫灌前主要利用深层40 cm以下土壤水,在灌溉后水分来源虽有向上迁移倾向,但仍大约有60%的水分源于土壤40 cm以下。deltaD同位素示踪发现杨树根系垂向可生长到土层200-400 cm范围,水平延伸至棉田内5-8 m,在5 m内棉花必定面临着杨树的水分与养分竞争。通过两种同位素方法分析出杨树和农作物的主要水分来源与潜在竞争区域,对防护林采取合理的管理措施及绿洲环境生态平衡提供指导。
英文摘要	Shelterbelt construction is considered an ecological solution to prevent sand erosion in the Xinjiang oasis. Shelterbelts, constructed from poplar (Populus), compete with crops for water, and thereby cause economic loss for farmers. We used direct inference of a stable oxygen isotope (delta~(18)O) and the SIAR model to analyse the most common water uptake depth water uptake depth of cotton (Gossypium) at different growth stages under mulched drip irrigation, and poplar's water utilization strategy before and after irrigation. Results showed cotton primarily relies on soil water from a depth of 0-40 cm, taking up water from the 0-20 cm layer in bud stage, and from the 20-40 cm layer in boll stage. However,poplar mainly utilized soil water from below 40 cm,and the depth of soil water used by poplar gradually decreased after irrigation. We identified poplar roots in soil at 200-400 cm deep, extending 5-8 m into the cotton field. This reflected that poplar must compete for water and nutrition within this 5 m, especially the inner 3 m. This research increases our understanding of potential areas of water competition between poplar and crops and suggests reasonable management for shelter forest to maintain oasis ecological balance.
中文关键词	杨树防护林 ; 棉花 ; 氢氧同位素 ; 生态平衡
英文关键词	shelter poplar cotton Hydrogen and oxygen ecological balance
语种	中文
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:6586572
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/316231
作者单位	1.中国科学院新疆生态与地理研究所;;中闻科学院大学, ;;, 乌鲁木齐;;, ;;北京 830011;;100049; 2.中国科学院新疆生态与地理研究所, 乌鲁木齐, 新疆 830011, 中国; 3.中闻科学院大学, 北京 100049, 中国
推荐引用方式 GB/T 7714	郭辉,赵英,蔡东旭,等. 氢氧同位素示踪法探测新疆地区防护林和棉花体系水分来源与竞争[J]. 中国科学院新疆生态与地理研究所,2019,39(18):6642-6650.
APA	郭辉,赵英,蔡东旭,兰志龙,&雷加强.(2019).氢氧同位素示踪法探测新疆地区防护林和棉花体系水分来源与竞争.生态学报,39(18),6642-6650.
MLA	郭辉,et al."氢氧同位素示踪法探测新疆地区防护林和棉花体系水分来源与竞争".生态学报 39.18(2019):6642-6650.