中度火干扰对林草地土壤理化特性的短期影响
发布时间：2019-03-28 05:55
【摘要】：火干扰作为一种自然扰动现象,对土壤物理、化学、矿化和微生物等土壤性质产生一定影响。在河南具茨山国家级森林公园过火林地和草地,进行土壤样品(0~5和5~10 cm土层)采集,测定表征土壤渗透性和持水能力的指标,研究中度火干扰对不同土层土壤理化特性的短期影响。结果表明:中度火干扰造成草地和林地土壤表层(0~5 cm)的土壤密度、含水率和非毛管孔隙度显著下降(P0.05),但火烧前后,土壤5~10 cm层上述物理特性指标之间没有显著差异(P0.05);火烧后草地和林地土壤表层(0~5 cm)有机C和全N显著下降(P0.05),而土壤pH、全P和全K显著上升(P0.05),相似的现象出现在草地土壤5~10 cm层,火烧前后林地土壤5~10 cm层,各化学特性指标没有显著差异(P0.05)。火烧使草地和林地土壤0~5 cm层的土壤初渗率、稳渗率和平均入渗率均显著上升(P0.05),而对土壤5~10 cm层土壤各渗透特性指标没有显著影响(P0.05);火烧使草地和林地土壤0~5 cm层土壤最大持水量和有效持水量均显著下降(P0.05),草地和林地最大持水量分别从未过火289.984和390.971 t/hm~2,下降到258.072和342.386 t/hm~2。该研究为开展火烧迹地植被恢复、水土保持和森林经营管理措施的制定,提供科学依据。
[Abstract]:Fire disturbance, as a natural disturbance phenomenon, has a certain effect on soil properties such as soil physics, chemistry, mineralization and microorganism. Soil samples (0 ~ 5 and 5 ~ 10 cm) were collected in overigneous forest land and grassland of Yuti Mountain National Forest Park in Henan Province, and the indexes of soil permeability and water holding capacity were measured. The short-term effects of moderate fire disturbance on soil physical and chemical properties in different soil layers were studied. The results showed that the density, moisture content and non-capillary porosity of soil surface layer (0 ~ 5 cm) in grassland and woodland decreased significantly (P0.05), but before and after burning, the soil density, moisture content and non-capillary porosity were significantly decreased by moderate fire disturbance (P0.05). There was no significant difference between the above-mentioned physical characteristics indexes in soil 5-10 cm layer (P0.05). After burning, the organic C and total N of the soil surface (0? 5 cm) decreased significantly (P0.05), while the total P and K of soil pH, increased significantly (P0.05). The similar phenomenon appeared in the soil layer of 5? 10 cm. There was no significant difference in chemical characteristics between 5 and 10 cm layers of forest soil before and after fire (P0.05). Fire increased the initial infiltration rate, steady infiltration rate and average infiltration rate of 0 ~ 5 cm layer of grassland and woodland soil significantly (P0.05), but had no significant effect on the soil permeability index of 5 ~ 10 cm soil layer (P0.05). The maximum and effective capacity of soil in 0 / 5 cm layer of grassland and woodland decreased significantly (P0.05). The maximum water capacity of grassland and woodland was never over289.984 and 390.971 t / hm ~ (2), respectively, and the maximum water capacity of grassland and forestland had never been over 289.984 and 390.971 t / hm ~ (2), respectively. Down to 258.072 and 342.386 t / hm 2. The study provides scientific basis for vegetation restoration, soil and water conservation and forest management.
【作者单位】： 河南农业大学林学院;
【基金】：河南省科技发展计划项目“河南山区栎类中幼龄林近自然抚育关键技术研究”(172102110232) 河南省高等学校重点科研项目“碳分布格局对栎类天然次生林近自然森林抚育的响应”(17B220001) 河南省林业厅技术招标项目“河南省山区森林抚育技术研究”(201402) 河南省高等学校青年骨干教师资助计划“抚育间伐对次生栎林碳周转的影响及其生态模拟”(2014GGJS-036)
【分类号】：S714.2;S812.2
，
本文编号：2448599
[Abstract]:Fire disturbance, as a natural disturbance phenomenon, has a certain effect on soil properties such as soil physics, chemistry, mineralization and microorganism. Soil samples (0 ~ 5 and 5 ~ 10 cm) were collected in overigneous forest land and grassland of Yuti Mountain National Forest Park in Henan Province, and the indexes of soil permeability and water holding capacity were measured. The short-term effects of moderate fire disturbance on soil physical and chemical properties in different soil layers were studied. The results showed that the density, moisture content and non-capillary porosity of soil surface layer (0 ~ 5 cm) in grassland and woodland decreased significantly (P0.05), but before and after burning, the soil density, moisture content and non-capillary porosity were significantly decreased by moderate fire disturbance (P0.05). There was no significant difference between the above-mentioned physical characteristics indexes in soil 5-10 cm layer (P0.05). After burning, the organic C and total N of the soil surface (0? 5 cm) decreased significantly (P0.05), while the total P and K of soil pH, increased significantly (P0.05). The similar phenomenon appeared in the soil layer of 5? 10 cm. There was no significant difference in chemical characteristics between 5 and 10 cm layers of forest soil before and after fire (P0.05). Fire increased the initial infiltration rate, steady infiltration rate and average infiltration rate of 0 ~ 5 cm layer of grassland and woodland soil significantly (P0.05), but had no significant effect on the soil permeability index of 5 ~ 10 cm soil layer (P0.05). The maximum and effective capacity of soil in 0 / 5 cm layer of grassland and woodland decreased significantly (P0.05). The maximum water capacity of grassland and woodland was never over289.984 and 390.971 t / hm ~ (2), respectively, and the maximum water capacity of grassland and forestland had never been over 289.984 and 390.971 t / hm ~ (2), respectively. Down to 258.072 and 342.386 t / hm 2. The study provides scientific basis for vegetation restoration, soil and water conservation and forest management.
【作者单位】： 河南农业大学林学院;
【基金】：河南省科技发展计划项目“河南山区栎类中幼龄林近自然抚育关键技术研究”(172102110232) 河南省高等学校重点科研项目“碳分布格局对栎类天然次生林近自然森林抚育的响应”(17B220001) 河南省林业厅技术招标项目“河南省山区森林抚育技术研究”(201402) 河南省高等学校青年骨干教师资助计划“抚育间伐对次生栎林碳周转的影响及其生态模拟”(2014GGJS-036)
【分类号】：S714.2;S812.2
，
本文编号：2448599
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