植物生态学报 ›› 2007, Vol. 31 ›› Issue (3): 348-354.DOI: 10.17521/cjpe.2007.0042
收稿日期:
2006-05-08
接受日期:
2007-01-11
出版日期:
2007-05-08
发布日期:
2007-05-30
通讯作者:
周广胜
作者简介:
* E-mail: gszhou@ibcas.ac.cn基金资助:
WANG Xu, ZHOU Guang-Sheng*(), JIANG Yan-Ling, JIA Bing-Rui, WANG Feng-Yu, ZHOU Li
Received:
2006-05-08
Accepted:
2007-01-11
Online:
2007-05-08
Published:
2007-05-30
Contact:
ZHOU Guang-Sheng
摘要:
比较利用静态箱式法测定长白山原始阔叶红松林(Pinus koraiensis)和次生杨桦混交林的土壤呼吸作用表明,两者土壤呼吸作用的日动态均主要受温度影响,次生林土壤呼吸作用的日变化极值出现时间较原始林提前1~2 h;两者具有明显的季节动态,其中8月土壤呼吸速率最大;在生长季,土壤呼吸速率与土壤含水量关系不显著,而与土壤5 cm温度呈显著的指数关系;生长季(5~9月)次生林土壤释放CO2量(3 449.4 g·m-2)约为原始林(2 674.4 g·m-2)的1.3倍,这可能是由于次生林内具有比原始林较高的温度和较低的土壤含水量,更有利于根系生长代谢和土壤微生物的活动引起的。
王旭, 周广胜, 蒋延玲, 贾丙瑞, 王风玉, 周莉. 山杨白桦混交次生林与原始阔叶红松林土壤呼吸作用比较. 植物生态学报, 2007, 31(3): 348-354. DOI: 10.17521/cjpe.2007.0042
WANG Xu, ZHOU Guang-Sheng, JIANG Yan-Ling, JIA Bing-Rui, WANG Feng-Yu, ZHOU Li. SOIL RESPIRATION IN NATURAL MIXED (BETULA PLATYPHYLLA AND POPULUS DAVIDIANA) SECONDARY FOREST AND PRIMARY BROAD-LEAVED KOREAN PINE FOREST. Chinese Journal of Plant Ecology, 2007, 31(3): 348-354. DOI: 10.17521/cjpe.2007.0042
土地类型 Land type | 地下生物量 Belowground biomass (g·m-2) | 凋落物量 Litters (g·m-2) | 有机碳 Organic C (mg·g-1) | 全氮 Total N (mg·g-1) | 碳氮比 C:N ratio | 容重 Bulk density (g·m-3) | pH值 pH value |
---|---|---|---|---|---|---|---|
阔叶红松林 Korean pine forest | 1 798.0 | 1 106.7 | 125.6 | 10.6 | 11.9 | 0.64 | 4.9 |
天然次生林 Natural secondary forest | 1 661.3 | 935.6 | 81.3 | 7.3 | 11.2 | 0.81 | 5.2 |
表1 样地描述
Table 1 Sites description
土地类型 Land type | 地下生物量 Belowground biomass (g·m-2) | 凋落物量 Litters (g·m-2) | 有机碳 Organic C (mg·g-1) | 全氮 Total N (mg·g-1) | 碳氮比 C:N ratio | 容重 Bulk density (g·m-3) | pH值 pH value |
---|---|---|---|---|---|---|---|
阔叶红松林 Korean pine forest | 1 798.0 | 1 106.7 | 125.6 | 10.6 | 11.9 | 0.64 | 4.9 |
天然次生林 Natural secondary forest | 1 661.3 | 935.6 | 81.3 | 7.3 | 11.2 | 0.81 | 5.2 |
森林类型 Forest type | Ta | T0 | T5 | T10 | T15 | T20 |
---|---|---|---|---|---|---|
次生林Secondary forest | 0.648 | 0.692 | 0.730 | 0.435 | 0.203 | -0.487 |
原始林Primary forest | 0.424 | 0.585 | 0.937 | 0.819 | 0.525 | 0.230 |
表2 土壤呼吸速率与土壤温度的相关系数
Table 2 Correlative coefficients between soil respiration and temperatures at natural secondary forest and primary forest plots
森林类型 Forest type | Ta | T0 | T5 | T10 | T15 | T20 |
---|---|---|---|---|---|---|
次生林Secondary forest | 0.648 | 0.692 | 0.730 | 0.435 | 0.203 | -0.487 |
原始林Primary forest | 0.424 | 0.585 | 0.937 | 0.819 | 0.525 | 0.230 |
图4 天然次生林与原始林地土壤含水量(0~10 cm)比较
Fig.4 Comparison between soil water contents (during the depth 0-10 cm) at natural secondary forest and primary forest plots
图5 天然次生林与原始林土壤呼吸作用与土壤含水量(0~10 cm)的关系
Fig.5 Relationships between soil respiration and soil water content (during the depth 0-10 cm) at natural secondary forest and primary forest plots
图6 两样地与气象站5 cm深处土壤温度的回归关系
Fig.6 Regressive relationships of soil temperature at 5 cm depth observed between at the experimental plots and meteorological station
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