Water absorption potential and influencing factors of leaf in Caragana korshinskii, Artemisia ordosica, Hedysarum scoparium in a revegetated area of the Tengger Desert, China

doi:10.7522/j.issn.1000-694X.2019.00111

Journal of Desert Research ›› 2020, Vol. 40 ›› Issue (2): 214-221.DOI: 10.7522/j.issn.1000-694X.2019.00111

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Water absorption potential and influencing factors of leaf in Caragana korshinskii, Artemisia ordosica, Hedysarum scoparium in a revegetated area of the Tengger Desert, China

Yang Lizhen^1,2, Feng Li¹, Yang Guisen^1,2, Huang Lei¹

1. Northwest Institute of Eco-Environmental and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049

Received:2019-10-10 Revised:2019-11-21 Online:2020-03-20 Published:2020-04-26

Abstract

Abstract: The foliar water uptake is the main way for plants to use small-scale precipitation in desert revegetated areas, which has important ecological hydrological significance for alleviating drought. The foliar water uptake potential of Caragana korshinskii, Artemisia ordosica and Hedysarum scoparium planted in a revegetated area of the Tengger Desert in 1956, 1964 and 1981 was studied. The leaf water uptake content (LWUC), percentage increase in leaf water content (R_w), leaf water saturation deficit (WSD), specific leaf area (SLA) and leaf dry material content (LDMC) of three typical sand fixing plants were measured, and analyzed its relationship with leaf water potential, net photosynthetic rate, transpiration rate, stomatal conductance and shallow and deep soil moisture content. The results showed that the leaves of three typical plants had the capacity of the water uptake. The capacity of the water uptake was: A. ordosica > H. scoparium > C. korshinskii. The LWUC of C. korshinskii, A. ordosica and H. scoparium ranged from 0.249-1.879, 0.429-10.009 and 0.051-4.955 mg·cm^-2. LWUC is most suitable for characterizing the capacity of water uptake. LWUC and R_w decreased with the increase of planting vegetation years, while WSD, SLA and LDMC did not change significantly. LWUC was significantly positively correlated with R_w and LDMC of C. korshinskii (P<0.01), and was positively correlated with SLA (P<0.05); LWUC was significantly positively correlated with R_w and WSD of A. ordosica (P<0.01); LWUC was significantly positively correlated with R_w and WSD of H. scoparium (P<0.01), and was negatively correlated with SLA (P<0.05). In general, LWUC of C. korshinskii and A. ordosica is mainly affected by water potential, respectively, and LWUC of H. scoparium is mainly affected by water potential and WUE. The most important influencing factors of different revegetated areas is shallow soil moisture content. The results of the study will deepen our understanding of the strategies for the use of water resources in desert revegetated areas.

Key words: desert plants, foliar water uptake, the Tengger Desert, revegetated

CLC Number:

Q945.79

Yang Lizhen, Feng Li, Yang Guisen, Huang Lei. Water absorption potential and influencing factors of leaf in Caragana korshinskii, Artemisia ordosica, Hedysarum scoparium in a revegetated area of the Tengger Desert, China[J]. Journal of Desert Research, 2020, 40(2): 214-221.

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Water absorption potential and influencing factors of leaf in Caragana korshinskii, Artemisia ordosica, Hedysarum scoparium in a revegetated area of the Tengger Desert, China

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