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[1]FU Yuan-nian,MA Feng-yun,LIU Li-chao.Influence of Biological Soil Crust Incurred Different Intensities of Disturbance on Herbal Plants in Artificial Fixed-Dunes Area[J].Research of Soil and Water Conservation,2011,18(05):87-90,95.

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Influence of Biological Soil Crust Incurred Different Intensities of Disturbance on Herbal Plants in Artificial Fixed-Dunes Area

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 05 Page number: 87-90,95 Column: Public date: 2011-10-20

Title:: Influence of Biological Soil Crust Incurred Different Intensities of Disturbance on Herbal Plants in Artificial Fixed-Dunes Area

Author(s):: FU Yuan-nian¹, MA Feng-yun², LIU Li-chao³; 1. Wuwei Forestry Technique Service Center, Wuwei, Gansu 733000, China;
2. College of Forestry, Shandong Agricultural University, Tai’an, Shandong 271018, China;
3. Shapotou Desert Research and Experiment Station, Cold and Arid Region Environment and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China

Keywords:: artificial fixed-dunes vegetation; biological soil crust; disturbance; vascular plant

CLC:: X171.4

DOI:: -

Abstract:: Biological soil crusts exist in a wide variety of environments around the world. It serves as an important biological factor contributing to the sand fixation. Disturbances are also widely existing phenomena in any ecosystem, especially in arid and semiarid areas in our country, where under the pressure of human population, disturbances such as grazing and trampling have important influences on the ecosystem. Our objective was to learn the influences of different disturbances for biological soil crusts on vascular plants by experiments of imitation disturbances set in artificial fixed-dunes area in Shapotou region. The results showed: the density, average crown, height, root length, and biomass of Bassia dasyphylla grown on three types of biological soil crusts increased significantly with the crusts being slightly disturbed. When the crusts were severely disturbed, the growth of Bassia dasyphylla increased moderately, while the density decreased. Under the circumstance of slight disturbance, the density and growth of Eragrostis minor grown on the moss crusts as well as on the the algae-moss crusts increased slightly and its density did not change significantly. Eragrostis minor grown on the algae crusts did not vary considerably in growth and density. With severe disturbance, Eragrostis minor grown on the moss crusts as well as on the algae-moss crusts increased slightly in height and decreased greatly in density and biomass. The growth and density of Eragrostis minor grown on the algae crusts did not change significantly. The mechanism of the different results of these two herbal plants was analyzed after the crusts were disturbed.

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