干旱区生态环境知识资源中心(Arid): 辽西半干旱区不同林龄大扁杏人工林的水分利用特征

Arid

	辽西半干旱区不同林龄大扁杏人工林的水分利用特征
其他题名	Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province
	刘丽颖 1; 殷有 1; 秦胜金 1; 周永斌 1; 卢国珍 2; 耿占礼 2
来源期刊	水土保持学报
ISSN	1009-2242
出版年	2016
卷号	30 期号:6 页码:118-122
中文摘要	利用稳定氧同位素技术,测定辽西地区不同林龄(5,11,17a)大扁杏枝条木质部水分、土壤水、降雨的雨水和井水的delta~(18) O值,结合其根系分布特征,分析不同林龄大扁杏人工林主要利用的水分来源;测定叶片delta13C值,分析不同林龄大扁杏人工林的水分利用效率。结果表明,大扁杏人工林利用土壤水的深度不同,5年和11年生大扁杏人工林主要利用0-30cm深度的土壤水,与其吸水根(d≤1mm)分布的土层深度一致,二者输导根分布在20-50cm土层深度;17年生大扁杏人工林主要利用0-20cm和50-70cm深度的土壤水,其吸收根分布在0-30cm土层深度,输导根分布在10-70cm土层深度;delta~(18) O值表明,3个林龄大扁杏人工林利用的土壤水均来自降雨的雨水和地下水;5年生大扁杏林的水分利用效率为-24.1,显著高于11年生和17年生大扁杏林(P<0.05)。大扁杏人工林在不同生长发育阶段因其根系分布的差异而具有不同的水分利用特征,有助于其更好地适应辽西地区的半干旱环境。
英文摘要	Prunus armeniacais a main shrub species of ecological and economic plantation in semi-arid area in western Liaoning Province.A water use strategy,including the main water source which a plant species utilizes and water use efficiency(WUE),plays an important role in plant survival and growth.Understanding the water use strategies of a shrub plantation can be used to evaluate the sustainability and long-term stability of the plantation.Stable oxygen isotope ratios(delta~(18) O)of water in rain,well,branch xylem,and in soil at different depth of 5,11and 17-year-old P.armeniaca plantation were tested to trace the main water source of P. armeniaca.Root systems were investigated to determine the depth of the main distribution.Leaf carbon isotope ratios(delta13 C)were used to evaluate the long-term WUE of P.armeniaca plantation.The results showed that 5and 11-year-old P.armeniacaplantations mainly derived soil water from the 0-30cm layer, which were coincident with the distribution of their fine roots.Conductive root systems of 5and 11-year-old P.armeniaca plantations were distributed primarily in the 20-50cm layer.17-year-old P.armeniaca plantations derived water mainly from the 0-20cm and 50-70cm layers,with their fine root and conductive root system being distributed primarily in the 0-30cm and 10-70cm layer,respectively.Thedelta~(18) O values indicated that these sources of soil water were recharged by rainfall and groundwater.The long-term WUE of 5-year-old plantation(-24.1)was greater than those of the 11and 17-year-old plantations(P<0.05). The water use strategies suggested that P.armeniaca plantation can adapt to a semi-arid environment of western Liaoning Province by changing its water use strategy over time.
中文关键词	大扁杏 ; 辽西半干旱区 ; 林龄 ; 水分利用
英文关键词	delta~(18) O delta13 C Prunus armeniaca semiarid region of Western Liaoning Province delta~(18) O delta13 C plantation age water use
语种	中文
国家	中国
收录类别	CSCD
WOS类目	HORTICULTURE
WOS研究方向	Agriculture
CSCD记录号	CSCD:5879686
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234988
作者单位	1.沈阳农业大学林学院, 沈阳, 辽宁 110866, 中国; 2.辽宁省干旱地区造林研究所, 朝阳, 辽宁 122000, 中国
推荐引用方式 GB/T 7714	刘丽颖,殷有,秦胜金,等. 辽西半干旱区不同林龄大扁杏人工林的水分利用特征[J],2016,30(6):118-122.
APA	刘丽颖,殷有,秦胜金,周永斌,卢国珍,&耿占礼.(2016).辽西半干旱区不同林龄大扁杏人工林的水分利用特征.水土保持学报,30(6),118-122.
MLA	刘丽颖,et al."辽西半干旱区不同林龄大扁杏人工林的水分利用特征".水土保持学报 30.6(2016):118-122.