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Forest and Grassland Resources Research >

2024 , Vol. 0 >Issue 2: 34 - 42

DOI: https://doi.org/10.13466/j.cnki.lczyyj.2024.02.005

Scientific Research

Plant Water Use Efficiency of Different Intercropping Patterns in the Karst Area of the Lijiang River Watershed

  • Wanglan TAO ,
  • Fuzhao HUANG ,
  • Jianxing LI ,
  • Zhiying WANG ,
  • Ting LUO ,
  • Fang LU ,
  • Xiankun LI
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  • 1. Guangxi Institute of Botany,Chinese Academy of Sciences,Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain,Guilin 541006,Guangxi,China
    2. Nonggang Karst Ecosystem Observation and Research Station of Guangxi,Chongzuo 532499,Guangxi,China
    3. Xishuangbanna Tropical Botanical Garden,Chinese Academy of Science,Xishuangbanna 666303,Yunnan,China
    4. College of Life Sciences,Guangxi Normal University,Guilin 541006,Guangxi,China

Received date: 2023-12-29

  Revised date: 2024-01-25

  Online published: 2024-09-02

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Abstract

Water is an essential factor limiting plant growth in Karst regions,so understanding the water relationships among different interspecific plants combinations in various intercropping patterns is important.To explore the plausibility of selecting of major non-woord tree species and medicinal plants,this study measured the stable carbon isotope composition of plant leaves in Prunus salicina-based on intercropping patterns and analyzed plant water use efficiency(WUE)to investigate the stability and plausibility of intercropping patterns.The results showed that the δ13C values and WUE of the six plantsleaves range from -31.6‰ to -28.7‰ and 20.56 to 37.94 μmol/mol,respectively.The rankings of δ13C and WUE were as follows:Illicium difengpi>P.salicina>Semiliquidambar cathayensis>Rubus chingii>Hypericum monogynum>Polygala fallax.It can be seen that I.difengpi,P.salicina,and S.cathayensis were more suitable for planting in Karst arid habitats,followed by R.chingii and H.monogynum,but P.fallax was not suitable for planting in such conditions.The WUE of P.salicina was significantly higher than that of the medicinal understory plants in the P.salicina+H.monogynum,P.salicina+P.fallax,and P.salicina+R.chingii,which exhibited significant differences in species fitness,indicated lower intercropping patterns stability.The P.salicina+S.cathayensis+I.difengpi had the highest WUE,and no significant differences in WUE were observed among the three tree species.This indicates their comparable fitness and stable coexistence.As a result,this intercropping patterns is considered an ideal model for agroforestry integration in the Karst region of the Lijiang River Watershed.

Key words： karst; intercropping planting; stable carbon isotope; water use efficiency

Cite this article

Wanglan TAO , Fuzhao HUANG , Jianxing LI , Zhiying WANG , Ting LUO , Fang LU , Xiankun LI . Plant Water Use Efficiency of Different Intercropping Patterns in the Karst Area of the Lijiang River Watershed[J]. Forest and Grassland Resources Research, 2024 , 0(2) : 34 -42 . DOI: 10.13466/j.cnki.lczyyj.2024.02.005

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