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[Water utilization characteristics of the degraded poplar shelterbelts in Zhangbei, Hebei, China.] / 张北地区退化杨树防护林的水分利用特征.
Zhang, Huan; Cao, Jun; Wang, Hua Bing; Song, Bo; Jia, Guo Dong; Liu, Zi Qiang; Yu, Xin Xiao; Zeng, Jia.
Affiliation
  • Zhang H; College of Water and Soil Conservation, Beijing Forestry University/Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China.
  • Cao J; Miyun Gardening and Greening Bureau, Beijing 101500, China.
  • Wang HB; Miyun Gardening and Greening Bureau, Beijing 101500, China.
  • Song B; Miyun Gardening and Greening Bureau, Beijing 101500, China.
  • Jia GD; College of Water and Soil Conservation, Beijing Forestry University/Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China.
  • Liu ZQ; College of Water and Soil Conservation, Beijing Forestry University/Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China.
  • Yu XX; College of Water and Soil Conservation, Beijing Forestry University/Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education, Beijing 100083, China.
  • Zeng J; Qingdao No.2 Middle School of Shandong Province, Qingdao 266000, Shandong, China.
Ying Yong Sheng Tai Xue Bao ; 29(5): 1381-1388, 2018 May.
Article in Zh | MEDLINE | ID: mdl-29797868
ABSTRACT
In Zhangbei County, Hebei Province, poplar-dominated shelterbelts are degraded to different extents. Water availability is the main limiting factor for plant survival in arid areas. The purpose of this study was to reveal the relationship between water availability and poplar degradation. Based on the hydrogen and oxygen stable isotope techniques, we explored the water sources of Populus simonii under different degradation degrees by comparing the isotopic values of P. simonii xylem water with that in potential water source, and calculated the utilization ratio of each water source. The results showed that the water sources of poplar trees varied with degradation degree. The water sources of P. simonii gradually transferred from the deep layer to the surface layer with the increases of degradation. P. simonii with no degradation mainly absorbed soil water in the range of 320-400 cm, with the utilization rate being 25.1%. P. simonii with slight degradation mainly used soil water at depth of 120-180, 180-240 and 240-320 cm. The total utilization rate of three layers was close to 50.0%, with less utilization of water from other layers. The moderately degraded P. simonii mainly used soil water at depth of 20-40, 40-60 and 60-80 cm. The utilization rate of each layer was 17.5%-20.9%, and the contribution rate of soil water under 120 cm was less than 10.0%. The severely degraded P. simonii mainly used water from surface soil layer (0-20 cm), with the utilization rate being 30.4%, which was significantly higher than that of other water sources. The water sources of poplar shelter forests were gradually shallower during the process of degradation. However, the low soil water content in the shallow layer could not meet the normal water demand of poplar, which would accelerate the degradation and even decline of poplar.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Water / Populus Country/Region as subject: Asia Language: Zh Journal: Ying Yong Sheng Tai Xue Bao Journal subject: SAUDE AMBIENTAL Year: 2018 Document type: Article Affiliation country: China

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Water / Populus Country/Region as subject: Asia Language: Zh Journal: Ying Yong Sheng Tai Xue Bao Journal subject: SAUDE AMBIENTAL Year: 2018 Document type: Article Affiliation country: China
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