Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province

LIU Liying1; 2; YIN You1; 2; QIN Shengjin1

doi:10.13870/j.cnki.stbcxb.2016.06.021

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Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province

更新时间：2025-03-12

- Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province
- Vol. 30, Issue 6, Pages: 118-122(2016)
- 作者机构：
  
  1. 沈阳农业大学林学院,沈阳,110866
  2. 中国森林生态系统监测网络/辽宁辽河平原森林生态系统定位研究站,沈阳,110866
  3. 辽宁省干旱地区造林研究所,辽宁,朝阳,122000
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2016.06.021
  CLC： S662.2
- Published：2016
- 稿件说明：
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LIU Liying1, 2, YIN You1, et al. Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province[J]. 2016, 30(6): 118-122.
DOI：

LIU Liying1, 2, YIN You1, et al. Water Use Characteristics of Different Ages of Prunus armeniaca Plantations in Semi-arid Region of Western Liaoning Province[J]. 2016, 30(6): 118-122. DOI： 10.13870/j.cnki.stbcxb.2016.06.021.

摘要

利用稳定氧同位素技术，测定辽西地区不同林龄(5，11，17 a)大扁杏枝条木质部、土壤水、降雨的雨水和井水的δ18O值，结合其根系分布特征，分析不同林龄大扁杏主要利用的水分来源；测定叶片δ13C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 a和11 a大扁杏人工林主要利用0—30 cm深度的土壤水，均与其吸水根(d≤1 mm)主要分布的土层深度一致，二者输导根均主要分布在20—50 cm土层深度；17 a大扁杏人工林主要利用0—20 cm和50—70 cm深度的土壤水，其吸收根主要分布在0—30 cm土层深度，输导根主要分布在10—70 cm土层深度；δ18O值表明，3个林龄大扁杏人工林主要利用的土壤水均来自降雨的雨水和地下水；5 a大扁杏林的水分利用效率为-24.1‰，显著高于11 a和17 a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。

Abstract

Prunus armeniaca is 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 (δ18 O) of water in rain

well

branch xylem

and in soil at different depth of 5

11- and 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 (δ13 C) were used to evaluate the long-term WUE of P. armeniaca plantation. The results showed that 5- and 11-year-old P. armeniaca plantations mainly derived soil water from the 0—30 cm layer

which were coincident with the distribution of their fine roots. Conductive root systems of 5- and 11-year-old P. armeniaca plantations were distributed primarily in the 20—50 cm layer. 17-year-old P. armeniaca plantations derived water mainly from the 0—20 cm and 50—70 cm layers

with their fine root and conductive root system being distributed primarily in the 0–30 cm and 10–70 cm layer

respectively. The δ18 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 11- and 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.

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