水土保持研究2013，Vol.20Issue(4)：55-60,6.
梭梭土壤种子库空间分布的尺度依赖性研究
Study on Spatial Distribution of Soil Seeds Bank of Haloxylon ammodendron in Gurbantunggut Desert
摘要
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.关键词
梭梭/土壤种子库/半方差函数/各向异性/尺度Key words
Haloxylon ammodendron / soil seed bank/ semivariance analysis/ anisotropy/ scale分类
农业科技引用本文复制引用
陈云龙,宋于洋,周朝彬..梭梭土壤种子库空间分布的尺度依赖性研究[J].水土保持研究,2013,20(4):55-60,6.基金项目
新疆生产建设兵团重点公益林生物多样性保护及生态状况监测项目(兵财企2006.813号) （兵财企2006.813号）
