[1]CHEN Yun-long,SONG Yu-yang,ZHOU Chao-bin.Study on Spatial Distribution of Soil Seeds Bank of Haloxylon ammodendron in Gurbantunggut Desert[J].Research of Soil and Water Conservation,2013,20(04):55-60.
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Study on Spatial Distribution of Soil Seeds Bank of Haloxylon ammodendron in Gurbantunggut Desert
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 04
Page number:
55-60
Column:
Public date:
2013-08-28
- Title:
- Study on Spatial Distribution of Soil Seeds Bank of Haloxylon ammodendron in Gurbantunggut Desert
- Keywords:
- Haloxylon ammodendron; soil seed bank; semivariance analysis; anisotropy; scale
- CLC:
- Q948.114
- DOI:
- -
- Abstract:
- The anisotropy and scale dependency of spatial pattern of soil seed bank of Haloxylon ammodendron were studied using geostatistics，through sampling from the surface to under-ground in three plots by neighboring grid method at Gurbantunggut Desert. The results showed that: (1) The average seed density ranged from 16.05 to 152.58 seeds/100 m2, and the coefficient of variation of seed density in Kuitun plot was higher than in the other two plots. (2) The strong spatial pattern intensities and notable anisotropy were found in soil seed bank. (3) The heterogeneity increased as scale increased from 5 m to 25 m in Kuitun and Wujiaqu plots, while the variation of heterogeneity was slight as scale changed in Jinghe. (4) The kriging map showed that the gradient variations of soil seed bank were significantly, spatial pattern showed remarkable aggregated distribution. The spatial distribution of ephemeral plant determined the spatial distribution of seed bank of Haloxylon ammodendron. The soil seed bank in Kuitun and Wujiaqu plots showed significantly mosaic features between high and low density. The seed density was low and relative homogeneous in Jinghe plot.
- References:
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1900-01-01