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不同土地利用类型对土壤可溶性有机碳的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年06期
Page:
15-19
Column:
专题报道
publishdate:
2016-11-30

Article Info:/Info

Title:
Effects of land use type on soil dissolved organic carbon in a land reclamation area from lake
Article ID:
1000-2006(2016)06-0015-05
Author(s):
HE Dongmei1 2 WANG Lei1 FENG Yuqing3 RUAN Honghua2*
1.Jiangsu Academy of Forestry, Nanjing 211153, China;
2. Co-Innovation Center for Sastainable Forestry in Soutern China, Jiangsu Key Laboratory of Forestry Ecological Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China;
3. Wetland Protection and Administration Station of Suzhou City, Suzhou 215128, China
Keywords:
land reclamation from lake land use type dissolved organic carbon(DOC)
Classification number :
S714
DOI:
10.3969/j.issn.1000-2006.2016.06.003
Document Code:
A
Abstract:
Since the late 1950s, land reclamation from lake has been a common human disturbance on lake ecosystems in China, and some shallow aquatic areas of lakes were converted into terrestrial soil with different land use types and managements. However, there is little known about the impact of different land use types on the soil carbon(C)cycle. We examined the influences of land use types on soil dissolved organic carbon(DOC)extracted from the cold-water(cDOC,CW), hot-water(cDOC,HW)and CaCl2 solution(cDOC,CaCl2), respectively. The results showed that the cDOC,HW was 2-6 times larger than cDOC,CW, and 4-9 times larger than cDOC,CaCl2. Under the four land use types, i.e. coniferous forest(MG), evergreen broadleaf forest(CC), moso bamboo forest(PE)and cropland(CL), all cDOC,CW, cDOC,HW and cDOC,CaCl2 decreased with the increase of the soil depth. The cDOC,CW under the different land use types exhibited the trends of CL > PE > MG in both 0-10 cm and ≥10-25 cm soil depth, while the cDOC,HW and cDOC,CaCl2 under PE were larger than that under the other land use types. The cDOC,HW and cDOC,CaCl2 under the four land use types showed significant correlations with the soil organic carbon(SOC), total nitrogen(TN)and pH, and the cDOC,HW and cDOC,CaCl2 under the MG was significantly positive correlation with the soil microbial biomass carbon(BMBC). However, cDOC,CW was only correlated with the SMBC at the land use type of CC. The results indicated that the soil DOC was affected by different soil properties induced from the different land use and management. The findings of this study are helpful to understand the impact of land use types reclaimed from lake on soil C cycle.

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Last Update: 2016-11-20