浙西南毛竹林覆盖对土壤渗透性及生物特征的影响

发布时间：2018-12-07 07:24

【摘要】：对浙西南山区4种不同覆盖年限下毛竹林地的土壤入渗、土壤理化性质、土壤根系和土壤动物特征进行了研究.结果表明:不同覆盖年限林地及同一林地不同土壤层次下土壤渗透性能存在较大差异,随着土层加深各林地土壤渗透性能均降低.渗透性能表现为覆盖1次林地未覆盖林地覆盖2次和3次后的林地.Kostiakov模型适合该研究区域的土壤水分入渗过程模拟.随着林地覆盖年限的增加(4~6年),林地土壤总孔隙度、非毛管孔隙度、pH值显著降低,而土壤容重、有机质和全N含量则显著提高.土壤初渗率、稳渗率、平均渗透率和渗透总量等均随根长密度减少而变小,土壤入渗能力的变化与直径0.5~5.0 mm的根长密度有关.不同覆盖年限毛竹林地土壤动物的平均密度差异显著,覆盖1次的林地最高,而覆盖3次的林地最低.综合纲、唇足纲、倍足纲、膜翅目、伪蝎目等大中型节肢动物,蜱螨目甲螨亚目、中气门亚目,以及弹尾目棘跳科、长角跳科、疣跳科、驼跳科等小型节肢动物数量的减少不利于土壤水分入渗.毛竹林长期覆盖会使土壤理化性状劣变,减弱土壤入渗性能,限制土壤动物活动,进而导致毛竹林退化.
[Abstract]:Soil infiltration, soil physical and chemical properties, soil root system and soil animal characteristics were studied under four different mulching years in the mountainous area of western and southern Zhejiang Province. The results showed that there were great differences in soil permeability under different mulching years and different soil layers in the same forest land, and the soil permeability decreased with the deepening of soil layer. The osmotic performance of the model was that the forestland was not covered once and twice and 3 times, and the Kostiakov model was suitable for simulating the infiltration process of soil water in the study area. With the increase of forest cover (4 ~ 6 years), the total porosity, non-capillary porosity and pH value of woodland soil decreased significantly, while the soil bulk density, organic matter and total N content increased significantly. The initial infiltration rate, steady permeability rate, average permeability and total permeability decreased with the decrease of root length density. The change of soil infiltration capacity was related to the root length density of 0.55.0 mm in diameter. The average density of soil animals in different mulching years of Phyllostachys pubescens forest land was significantly different, the forest land with one cover was the highest, and the forest land with three mulching times was the lowest. Large and medium-sized arthropods, such as Hymenoptera, Passioptera, Hymenoptera, Aracidae, Acaridae, Mesopodium, Acaridae, Acanthidae, Echinopodidae, Verrucaceae, Acanthoptera, Arthropoda, etc. The decrease in the number of small arthropods such as Camelidae is not conducive to soil moisture infiltration. The long-term mulching of Phyllostachys pubescens forest will result in deterioration of soil physical and chemical properties, weakening of soil infiltration, restriction of soil animal activity and degradation of Phyllostachys pubescens forest.
【作者单位】：丽水学院;南京林业大学;
【基金】：国家重点基础研究发展计划项目(2012CB416904)资助~~
【分类号】：S714

【相似文献】