Journal
CONTEMPORARY PROBLEMS OF ECOLOGY
Volume 6, Issue 1, Pages 128-136Publisher
SPRINGER
DOI: 10.1134/S1995425513010198
Keywords
two enclosures; land use intensity; vegetation; diversity; biomass; soil moisture
Categories
Funding
- Chinese National Key Projects for Basic Scientific Research [2009CB421303]
- Chinese National Fund Projects [30972422]
- Chinese National Support Projects of Science and Technology [2011BAC07B02-06]
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Effects of different land use intensity (phytomass semi-cutting and all-cutting) on structure characteristics of plant community and soil moisture in a natural vegetation enclosure and an artificially-aided enclosure were investigated in a sandy grassland in Northern China. No-cutting (phytomass kept nomal) was taken as the control treatment (CK). Analyzes showed that: 1-Importance value of the dominant species of different cutting treatments was in the range of 0.47-0.75. The influence of different cutting intensities on species composition was not significant for the same fenced method; 2-Both the diversity indices and the evenness index of shrub layer for the two enclosures were in the order: CK > semi-cutting > all-cutting; the similar indices of the plots of same cutting intensity and different fenced methods were smaller than 0.3; 3-The above-ground biomass of all-cutting treatment was significantly less than that of semi-cutting treatment, and CK had no significant difference from semi-cutting treatment; 4-There were significant differences in soil moisture between all-cutting and semi-cutting. The soil moisture of different layers within 80 cm increased with the increase of cutting intensities. In 0-30 cm, the soil moisture in different cutting intensities was increased with depth; however, in 30-70 cm, it decreased quickly with the increase of soil depth. Soil moisture under different cutting intensities and CK was in the following order: all-cutting > semi-cutting > CK. It proved that land use has some regulation and improvement effects on soil moisture.
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