Sciences in Cold and Arid Regions ›› 2016, Vol. 8 ›› Issue (5): 411–418.doi: 10.3724/SP.J.1226.2016.00411

• ARTICLES • 上一篇    

Vertical distribution of Artemisia halodendron root system in relation to soil properties in Horqin Sandy Land, NE China

YongQing Luo1, XueYong Zhao1, JiePing Ding2,3, Tao Wang1   

  1. 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
    2. Gansu Academy of Environmental Sciences, Lanzhou, Gansu 730020, China;
    3. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
  • 收稿日期:2016-03-24 修回日期:2016-06-22 发布日期:2018-11-23
  • 通讯作者: Ph.D., YongQing Luo, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences. No. 320, West Donggang Road, Lanzhou, Gansu 730000, China. E-mail:luoyongqing@lzb.ac.cn E-mail:luoyongqing@lzb.ac.cn
  • 基金资助:
    This work was financially supported by the National Nature Science Foundation of China (No. 31500369) and the "One Hundred Talent" Program (Y551821001 and Y451H31001) of Chinese Academy of Sciences. We also thank the colleagues of Naiman Desertification Research Station, Chinese Academy of Sciences, for their help in laboratory analysis.

Vertical distribution of Artemisia halodendron root system in relation to soil properties in Horqin Sandy Land, NE China

YongQing Luo1, XueYong Zhao1, JiePing Ding2,3, Tao Wang1   

  1. 1. Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;
    2. Gansu Academy of Environmental Sciences, Lanzhou, Gansu 730020, China;
    3. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China
  • Received:2016-03-24 Revised:2016-06-22 Published:2018-11-23
  • Contact: Ph.D., YongQing Luo, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences. No. 320, West Donggang Road, Lanzhou, Gansu 730000, China. E-mail:luoyongqing@lzb.ac.cn E-mail:luoyongqing@lzb.ac.cn
  • Supported by:
    This work was financially supported by the National Nature Science Foundation of China (No. 31500369) and the "One Hundred Talent" Program (Y551821001 and Y451H31001) of Chinese Academy of Sciences. We also thank the colleagues of Naiman Desertification Research Station, Chinese Academy of Sciences, for their help in laboratory analysis.

摘要: Root distribution plays an important role in both vegetation establishment and restoration of degraded land through influencing soil property and vegetation growth. Root distribution at 0~60 cm depth of A. halodendron was investigated in Horqin Sandy Land. Soil organic carbon (SOC) and nitrogen (SN) concentration as well as carbon and nitrogen in root biomass and necromass were measured. Root length density (RLD) was estimated. Total root biomass, necromass and the RLD at 0~60 cm depth was 172 g/m2, 245 g/m2, and 368 m/m2, respectively. Both biomass and necromass of A. halodendron roots decreased with soil depth, live roots were mainly at 0~20 cm (76% of biomass and 63% of root length), while 73% of the necromass was within 0~30 cm depth. N concentration of roots (biomass and necromass) was about 1.0% and 1.5%, respectively. There were significant differences in SOC concentration between soil layers, but insignificant for SN. Soil C/N ratio decreased with depth (P<0.05). C and N storage for belowground system at 0~60 cm decreased markedly with depth; 41.4% of C and 31.7% of N were allocated to the 0~10 cm layer. Root bio- and necromass together contained similar amount of C to that of the soil itself in the top layer. N stock was dominated by soil nitrogen at all depths, but more so in deeper layers. It is clear that differentiating between soil layers will aid in interpreting A. halodendron efficiency in soil restoration in sandy land.

关键词: organic carbon, nitrogen, allocation, Horqin Sandy Land, soil restoration

Abstract: Root distribution plays an important role in both vegetation establishment and restoration of degraded land through influencing soil property and vegetation growth. Root distribution at 0~60 cm depth of A. halodendron was investigated in Horqin Sandy Land. Soil organic carbon (SOC) and nitrogen (SN) concentration as well as carbon and nitrogen in root biomass and necromass were measured. Root length density (RLD) was estimated. Total root biomass, necromass and the RLD at 0~60 cm depth was 172 g/m2, 245 g/m2, and 368 m/m2, respectively. Both biomass and necromass of A. halodendron roots decreased with soil depth, live roots were mainly at 0~20 cm (76% of biomass and 63% of root length), while 73% of the necromass was within 0~30 cm depth. N concentration of roots (biomass and necromass) was about 1.0% and 1.5%, respectively. There were significant differences in SOC concentration between soil layers, but insignificant for SN. Soil C/N ratio decreased with depth (P<0.05). C and N storage for belowground system at 0~60 cm decreased markedly with depth; 41.4% of C and 31.7% of N were allocated to the 0~10 cm layer. Root bio- and necromass together contained similar amount of C to that of the soil itself in the top layer. N stock was dominated by soil nitrogen at all depths, but more so in deeper layers. It is clear that differentiating between soil layers will aid in interpreting A. halodendron efficiency in soil restoration in sandy land.

Key words: organic carbon, nitrogen, allocation, Horqin Sandy Land, soil restoration

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