Soil samples were collected to a depth of 20 cm using a 3.0 m × 3.0 m grid in 900 m 2(30.0 m ×30.0 m) plots for analysis of spatial patterns of soil in undisturbed area of China fir(Cunninghamia lanceolata) ...
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Soil samples were collected to a depth of 20 cm using a 3.0 m × 3.0 m grid in 900 m 2(30.0 m ×30.0 m) plots for analysis of spatial patterns of soil in undisturbed area of China fir(Cunninghamia lanceolata) and Masson pine(Pinus massoniana) mixed forest in the Three Gorger Reservoir *** investigation data showed that the average of soil DNA content was 922.71 μg·g-1 water-free soil,the maximal value was 6 761.30 μg·g-1 water-free soil,and the less value 58.52 μg·g-1 water-free *** geostatistical analysis indicated that the spatial distribution characteristic was not obviously reflected by the liner graphs while samples were randomly distribution and independent each *** separation distance among samples was related to precision of soil DNA content,the effects of non-structure factors(environment factors,disturbed factors) on spatial correlation structure would disappeared due to the separation distance in excess of 18.84 m,and the spatial correlation of soil DNA faded down in *** variability in soil DNA in the region was mostly contributed by the influencing factors including soil nitrogen,soil organic matter and content of soil water.
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