Soil properties in forest gaps and under canopy in broad-leaved Pinus koraiensis forests in Changbai Mountainous Region, China |
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Authors: | Chunyu Zhang Xiuhai Zhao |
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Institution: | (1) Key Laboratory for Silviculture and Conservation of Forest, Ministry of Education, Beijing Forestry University, Beijing, 100083, China |
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Abstract: | The species composition and diversities, and soil properties under canopy gaps in broad-leaved Pinus koraiensis forests were studied in the Changbai Mountains. The results indicated that the species composition and diversities in gap
were different from those under canopy. The Shannon-Wiener index, evenness index, and abundance index in gap were higher than
those under canopy in the seedling layer, while the community dominance in the seedling layer increased in closed canopy.
The physicochemical properties of soil changed with the change of space and resource availability in gaps. The thickness,
standing crop, and water holding capacity of the litter layer under canopy were significantly (p<0.01) higher than those in gap. The content of total nitrogen and total potassium of litter in gap were 10.47% and 20.73%
higher than those under canopy, however, the content of total phosphorus and organic carbon under canopy were 15.23% and 12.66%
more than those under canopy. The water content of 0–10 cm and 10–20 cm of soil layer in gap were 17.65% and 16.17% more than
those under canopy. The soil buck density of 0–10 cm were slightly higher under canopy than that in gaps, but there was no
significant difference in the soil buck density of the 10–20 cm soil layer. The soil pH values were 5.80 and 5.85 in gap and
under canopy, respectively, and were not significantly different. The content of soil organic matter, total nitrogen, and
total potassium in gap were 12.85%, 7.67%, and 2.38% higher than those under canopy. The content of NH4
+-N, available phosphorus, available potassium, and total phosphorus in soil under canopy were 13.33%, 20.04%, 16.52%, and
4.30% higher than those in gap.
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Translated from Forest Research, 2006, 19(3): 347–352 译自: 林业科学研究] |
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Keywords: | broad-leaved Pinus koraiensis forest forest gap litter layer forest soil Changbai Mountains |
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