干旱区生态环境知识资源中心(Arid): 基于~(18)O示踪的不同树龄枣树土壤水分利用特征分析

Arid

	基于~(18)O示踪的不同树龄枣树土壤水分利用特征分析
其他题名	Characteristics of soil water utilization for different stand ages of jujube trees based on ~(18)O tracking
	赵西宁 1; 李楠 2; 高晓东 1; 霍高鹏 2; 潘燕辉 3
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2018
卷号	34 期号:3 页码:135-142
中文摘要	为明确不同树龄枣树的水分利用特征。该研究利用稳定氧同位素(~(18)O)示踪方法,测定4个不同树龄(4、8、 17和22年)枣树的木质部水与潜在水源的氧同位素比率delta~(18)O值,利用MixSIR模型定量计算各树龄枣树对潜在水源的利用比例。结果表明,浅层(0~40 cm)土壤水分相对充足时期,枣树主要吸收浅层土壤水分,浅层土壤水分匮乏时,枣树会增加中层(>40~120 cm)和深层(>120~200 cm)土壤水分的吸收比例。萌芽展叶期不同树龄枣树都主要吸收浅层土壤水分;开花坐果期,随着树龄的增加,枣树对浅层土壤水的吸收比例逐渐减少,对深层土壤水的吸收比例逐渐增加;果实膨大期,4年生枣树主要吸收中层土壤水分,8年生枣树主要吸收深层土壤水分,而17和22年生枣树主要吸收浅层土壤水分;果实成熟期,8和17年生枣树分别主要吸收浅层和深层土壤水分,22年生则主要吸收中层土壤水分。根据不同树龄枣树的水分利用特征对其进行水分管理以减少4、8年生枣树浅层土壤水分的非生产性耗水及17、22年生枣树自身奢侈性耗水,实现红枣林的长期健康发展。
英文摘要	Since the initiation of the large-scale ecological rehabilitation project by the Chinese central government in 1999, jujube forest was widely cultivated in the loess hilly region, due to its ecological and economic benefits. Soil moisture is a key factor affecting jujube growth. Clarifying water use strategy of jujube trees of different stand ages can provide useful indications for the water management of jujube forest in this area. In 2016, we selected 4 different stand ages (4, 8, 17 and 22 years) of jujube forests in a rain-fed jujube (Ziziphus Jujube cv. Lizao) plantation in Qingjian County, Shaanxi Province (37°15’N, 118°18’E). In the study, the oxygen stable isotope tracer method was used to measure the oxygen isotope ratio (delta~(18)O) of xylem water and soil water sources in jujube orchards with 4 different stand ages, and the contribution of soil water from different depths to water uptake was estimated by the MixSIR Bayesian mixing model. The results showed that soil moisture and soil water delta~(18)O varied across soil depths and sampling dates, which were influenced by the rainfall and evaporation. The composition of soil water isotopes and rainfall isotopes showed the same temporal trend. In arid and semi-arid areas, with the variation of soil moisture, jujube trees of different stand ages could adjust the utilization structure of soil water to adapt to the soil water environment changes. Jujube tree mainly absorbed soil water from shallow soil (0-40 cm) when soil water was available. However, when shallow soil water was scarce, jujube tree mainly absorbed the soil water from middle layer (>40-120 cm) and deep layer (>120-200 cm) with the stand age increasing, leading to the middle and deep soil water content close to wilting point (7%). In germination stage (May 29~(th)), jujube trees mainly absorbed shallow soil water. With the increase of stand age of jujube trees, the ratio of water absorption for jujube trees from shallow soil water gradually decreased, whereas the proportion of deep soil water absorption gradually increased during flowering and fruit setting stage (July 29~(th)), and water absorption rates in shallow layer for the 4-, 8-, 17-, and 22-year-old jujube trees were 63.58%, 78.79%, 45.03% and 11.81%, respectively. However, water absorption rates in deep layer for the 17- and 22-year-old jujube trees were 39.22% and 72.25%, respectively. In fruit enlargement period (August 26th), 4-year-old jujube trees mainly absorbed middle layer soil water, and 8-year-old jujube trees absorbed deep soil water, with absorption rate as much as 94.30%, while 17- and 22-year-old jujube trees mainly absorbed shallow soil water. During the fruit ripening period (September 25th), 8-, 17- and 22-year-old jujube trees mainly absorbed shallow, deep and middle layer soil water, respectively. The results suggest that based on soil water utilization characteristics of jujube trees with different stand ages, water management should be carried out for reducing the non-productive water consumption for 4- and 8-year-old jujube trees and the luxury water consumption for 17- and 22-year-old jujube trees, so as to ensure the sustainability of the local jujube forest and soil water use.
中文关键词	土壤 ; 水分 ; 同位素 ; 枣树 ; 树龄 ; MixSIR模型
英文关键词	soil moisture isotopes jujube stand ages MixSIR model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6170836
来源机构	兰州大学 ; 西北农林科技大学 ; 中国科学院水利部水土保持研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237961
作者单位	1.西北农林科技大学水土保持研究所;;中国科学院水利部水土保持研究所, ;;, 杨凌;;杨凌, ;; 712100;;712100; 2.西北农林科技大学水利与建筑工程学院, 杨凌, 712100; 3.兰州大学, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	赵西宁,李楠,高晓东,等. 基于~(18)O示踪的不同树龄枣树土壤水分利用特征分析[J]. 兰州大学, 西北农林科技大学, 中国科学院水利部水土保持研究所,2018,34(3):135-142.
APA	赵西宁,李楠,高晓东,霍高鹏,&潘燕辉.(2018).基于~(18)O示踪的不同树龄枣树土壤水分利用特征分析.农业工程学报,34(3),135-142.
MLA	赵西宁,et al."基于~(18)O示踪的不同树龄枣树土壤水分利用特征分析".农业工程学报 34.3(2018):135-142.