造纸废渣和养分的改良对北部硬阔叶林土壤表面CO2通量的影响 |
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摘 要: |
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关 键 词: | 森林土壤 肥力 CO2通量 环境设计 造纸工业 |
文章编号: | 1007-662X(2005)04-0265-05 |
收稿时间: | 2005-05-19 |
修稿时间: | 2005-08-18 |
Effects of amendments of paper mill sludge and nutrients on soil surface CO2 flux in northern hardwood forests |
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Authors: | Wang Chuan-kuan Drew C Feldkirchner Stith T Gower Jim Ferris Eric L Kruger |
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Institution: | (1) College of Forestry, Northeast Forestry University, 150040 Harbin, China;(2) Department of Forest Ecology and Management, University of Wisconsin, 1630 Linden Dr., 53706 Madison, WI, USA;(3) Champion International Corporation, W6852 Hwy.US2, HCR Box 121A, 49870 Norway, MI, USA |
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Abstract: | Safe and economical disposal of paper mill sludge is a key consideration for forest products industry. A study was conducted
to examine the effects of amendments of sludge and nutrients on soil surface CO2 flux (Rs) in northern hardwood forests and to quantify the relat among R5, soil temperature, and moisture in these stands. The experiment was a randomized complete block design that included sludge-amended,
fertilized, and control treatments in sugar maple (Acer saccharum Marsh) dominated hardwood forests in the Upper Peninsula of Michigan, USA. Results showed that Rs was positively correlated to soil temperature (R2=0.80, p<0.001), but was poorly correlated to soil moisture. Soil moisture positively affected the Rs only in the sludge-amended treatment. The Rs was significantly greater in the sludge-amended treatment than in the fertilized (p=0.033) and the control (p=0.048) treatments.
The maximum Rs in the sludge-amended treatment was 8.8 μmol CO2·m−2·s−1, 91% and 126% greater than those in the fertilized (4.6 μmol CO2·m−2·s−1) and control (3.9 μmol CO2·m−2·s−1) treatments, respectively. The Rs did not differ significantly between the fertilized and control treatments. The difference in Rs between sludge-amended and the other treatments decreased with time following treatment.
Foundation item: The research was funded by a NCASI grant to S.T. Gower. Wang CK was supported by Innovated Talent Program of Northeast Forestry
University (2004–07)
Biography: WANG Chuan-kuan (1963-), male, Professor in the Ecology Program, College of Forestry, Northeast Forestry University, Harbin
150040, China.
Responsible editor: Chai Ruihai |
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Keywords: | Paper mill sludge Fertilization Soil surface CO2 flux Environmental factor |
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