Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China

doi:10.1016/j.agwat.2018.12.007

	Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China
	Ma Lihui 1,2; Wang Xing 1; Gao Zhiyong 3; Wang Youke 1; Nie Zhenyi 2; Liu Xiaoli 2
刊名	AGRICULTURAL WATER MANAGEMENT
	2019-05-01
卷号	216 页码:436-443
关键词	Jujube plantation Loess region Pruning Transpiration Water consumption Water use efficiency
ISSN号	0378-3774
DOI	10.1016/j.agwat.2018.12.007
通讯作者	Wang Xing(404270234@qq.com)
英文摘要	Aims: Soil drying has occurred widely in artificial plantations in the semiarid loess region because the water consumption exceeds the rainfall. Jujube (Ziziphus jujube Mill. CV. Lizao) plantations have been planted to improve the economic income since 2000. In order to prevent soil drying and sustain artificial plantation development, we examined the relationships between the canopy size, water consumption, and water use efficiency in a dry land jujube plantation. Methods: Seven treatments were tested comprising native jujube with no pruning and dwarfing jujube under different pruning levels ranging from 1 to 6. Jujube is a popular dwarfing canopy type in this region with a tree height of 2.2 m and this comprised level 1. Jujube received increased intensities of pruning as well as decreases in tree height and canopy size for levels 2-4. Jujube received severe pruning to a tree height of only 1.1 m at level 5, and the canopy was removed with only 30-40 cm of the trunk left for level 6. Soil water was detected using CNC100 neutron tubes. A thermal diffusion probe was used to monitor the sap flow in jujube trees throughout the whole growth period. Results: During our study period, 2014 was a wet year with rainfall of 460.4 mm and 2015 was a dry year with rainfall of only 380.8 mm. Transpiration and water consumption by jujube decreased significantly whereas the soil water content increased as the pruning intensity increased in these two years. Compared with 15-year-old native jujube, the annual soil water consumption by 15-year-old dwarfing jujube (pruned at level 1) was 6.54 mm less and the soil water consumption depth moved upward by 2.2 m. The soil water recovered faster for jujube at level 6 and the soil water restoration depth reached 4.6 m after 3 years, with an annual restoration depth of 153.3 cm. Compared with level 1 jujube, at level 5, the height was halved, the transpiration was about 22.1%, and the water use efficiency was significantly improved by 1.1 times, thereby demonstrating that the water consumption could be regulated by the canopy size. Level 2 jujube had the highest water use efficiency with the optimal pruning level in the local region. Conclusions: We found that pruning could effectively decrease water consumption, relieve deep soil drying, and improve the water use efficiency in jujube. The pruning level should be determined based on the water consumption rate and average rainfall to obtain high yields.
资助项目	National Science Foundation of China[41671510] ; Fund of State Key Laboratory[A318009902-1507] ; Science Technology coordination & Innovation Project in Shaanxi Province[216KTZDNY-01-04]
WOS关键词	DOUGLAS-FIR ; SAP FLOW ; PLATEAU ; TRANSPIRATION ; TREES
WOS研究方向	Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000461262400040
资助机构	National Science Foundation of China ; Fund of State Key Laboratory ; Science Technology coordination & Innovation Project in Shaanxi Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/49323]
专题	中国科学院地理科学与资源研究所
通讯作者	Wang Xing
作者单位	1.Northwest A&F Univ, Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China 3.Xian Univ Technol, Minist Educ, Key Lab Northwest Water Resource & Ecol Environm, Xian 710048, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ma Lihui,Wang Xing,Gao Zhiyong,et al. Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China[J]. AGRICULTURAL WATER MANAGEMENT,2019,216:436-443.
APA	Ma Lihui,Wang Xing,Gao Zhiyong,Wang Youke,Nie Zhenyi,&Liu Xiaoli.(2019).Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China.AGRICULTURAL WATER MANAGEMENT,216,436-443.
MLA	Ma Lihui,et al."Canopy pruning as a strategy for saving water in a dry land jujube plantation in a loess hilly region of China".AGRICULTURAL WATER MANAGEMENT 216(2019):436-443.