砒砂岩区主要造林树种枯落物及林下土壤持水特性

发布时间：2018-06-13 13:55

本文选题：砒砂岩区 + 枯落物　；参考：《水土保持学报》2017年03期

【摘要】：为了探究砒砂岩区不同造林树种水文特征,以该地区油松、侧柏、青杨、山杏、沙棘、柠条为研究对象,通过浸泡法和环刀法,对比分析了不同树种枯落物层和土壤层的持水特性。结果表明:砒砂岩区主要造林树种枯落物蓄积量变动范围为1.55~7.89t/hm~2,青杨林下枯落物最大持水率最高为281.26%,其他树种枯落物最大持水率依次为油松(217.14%)、侧柏(201.05%)、山杏(202.79%)、沙棘(170.96%)、柠条(158.08%)撂荒地(143.88%)。油松林下土壤层容重最小为1.46g/cm3,总孔隙度和毛管孔隙度最大分别为43.55%和36.99%,毛管持水量最大为14.50mm;山杏林下土壤非毛管孔隙度最大为13.12%,非毛管持水量最大为6.86mm。油松枯落物及其林下土壤层持水能力良好,更适宜作为砒砂岩地区植被建设树种。
[Abstract]:In order to investigate the hydrological characteristics of different afforestation trees in the soft rock area, pine, Platycladus orientalis, poplar, apricot, Hippophae rhamnoides and Caragana korshinskii were studied. The water retention characteristics of litter layer and soil layer of different tree species were compared and analyzed. The results showed that the variation range of litter volume of main afforestation tree species was 1.55 ~ 7.89 t / hm ~ (-2), the maximum water holding rate of litter was 281.26 under green Yang Lin, the maximum water holding rate of other tree species was Pinus tabulaeformis 217.1414, Platycladus orientalis 201.05, Apricot 202.79m, Hippophae rhamnoides 170.96m, Caragana Caragana 158.08). Under Pinus tabulaeformis forest, the minimum bulk density of soil layer was 1.46 g / cm ~ 3, the maximum of total porosity and capillary porosity were 43.55% and 36.99%, the maximum capillary water holding capacity was 14.50 mm, the maximum of soil non-capillary porosity was 13.12 mm and the maximum of non-capillary water holding capacity was 6.86 mm. under Pinus tabulaeformis forest. The litter of Pinus tabulaeformis and its soil layer have good water holding capacity, so it is more suitable for vegetation construction in arsenitic sandstone area.
【作者单位】：内蒙古农业大学沙漠治理学院;
【基金】：内蒙古自治区水利厅项目“砒砂岩区典型小流域植被对位配置研究”
【分类号】：S714.7

【相似文献】