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[1]ZHAO Shenglong,ZENG Fanjiang,ZHANG Bo,et al.Effects of Burning and Cutting on Leaf Ecological Stoichiometry Characteristics of Alhagi sparsifolia[J].Research of Soil and Water Conservation,2017,24(01):84-89.

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Effects of Burning and Cutting on Leaf Ecological Stoichiometry Characteristics of Alhagi sparsifolia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 24 Number of periods: 2017 01 Page number: 84-89 Column: Public date: 2017-02-28

Title:: Effects of Burning and Cutting on Leaf Ecological Stoichiometry Characteristics of Alhagi sparsifolia

Author(s):: ZHAO Shenglong^1,2,3,4, ZENG Fanjiang^1,2,3, ZHANG Bo^1,2,3,4, LI Changjun^1,2,3,4, LIU Bo^1,2,3, GAO Huanhuan^1,2,3,4; 1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. Cele National Station of Observation and Research for Desert-Grassland Ecosystems, Cele, Xinjiang 848300, China;
3. Key Laboratory of Biogeography and Bioresource in Arid Zone, Chinese Academy of Sciences, Urumqi 830011, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China

Keywords:: Alhagi sparsifolia; cutting; burning; N; P; K; dynamic variation

CLC:: Q945.79

DOI:: -

Abstract:: Taking the dominant plant Alhagi sparsifolia at the southern fringe of Taklimakan Desert as sample, we examined the effects of different disturbances treatments (cutting in spring, cutting in fall and burning in spring) on leaf N, P and K ecological stoichiometry characteristics. The results showed that N, P and K concentrations of Alhagi sparsifolia leaf were significantly lower under cutting in spring and burning treatments along with the seasonal variation, while N∶P mass ratio was no obvious variation. The N concentration and N∶P mass ratio of leaf first decreased and then increased, and K concentration first increased then decreased under cutting in fall treatments, at the same time, P concentration was no obvious variation. Based on variation analysis among different seasons within different treatments of Alhagi sparsifolia leaf, N, P, K concentrations were more seasonal dynamic under the treatment of burning in spring than the other treatments, which were 22.32%, 20.43%, 28.27%, respectively, seasonal dynamics of N concentration and N∶P mass ratio under treatment of cutting in spring were less than the other treatments, which were 16.29%, 8.67%, respectively. P concentration under the treatment of cutting in fall was less seasonal dynamic than the other treatments, which was 8.64%. K concentration was less seasonal dynamic and in N∶P mass ratio was more seasonal dynamics under control treatment than the other treatments, which were 8.11%, 24.26%, respectively. With growth stage and treatments as independent factors, factorial analysis of variation for N, P and K concentrations and N∶P mass ratio showed that Alhagi sparsifolia leaf N concentration and N∶P mass ratio were mainly determined by an interaction between growth stage and disturbance, while leaf P and K concentrations were mainly determined by growth stage of plant.

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