接坝地区5种林分类型土壤水分—物理性质研究

Study on Soil Water—Physical Properties of Five Forest Types in Sangdlot Near Altiplano Bashang

该文以河北围场县接坝地区5种混交林作为研究对象,对其土壤水分—物理性质进行了分析研究。结果表明:土层越深容重越大,土壤总孔隙度逐渐减少。土壤容重均值大小顺序为:落桦混交林>栎松混交林>杨桦混交林>桦松混交林>阔叶混交林;土壤持水量与土壤容重之间存在正相关关系。土壤总孔隙度排序为:阔叶混交林>杨桦混交林>桦松混交林>栎松混交林>落桦混交林;土壤最大持水量均值排序为:阔叶混交林>桦松混交林>杨桦混交林>栎松混交林>落桦混交林;土壤稳渗速率排序为:阔叶混交林>桦松混交林>落桦混交林>杨桦混交林>栎松混交林,土壤入渗速率与入渗时间呈明显幂函数关系。

Soil characteristics determine the growth and regeneration of forest vegetation. In this paper, the researcher took five kinds of mixed forest in Angdlot Near Altiplano Bashang of Hebei Weichang as the research objects, and analyzed and studied the soil moisture physical properties. The results showed that： The deeper the soil bulk density was larger, but the soil total porosity was gradually reduced. The order of soil bulk density was： Larix gmelini ＋ Betula platyphylla mixed forest〉 Quercus mongolica＋Pinus tabulaeformis mixed forest〉Pobulus davidiana＋Betula platyphylla mixed forest〉Betula platyphylla＋Pi- nus tabulaeformis mixed forest〉Broad-leaved mixed forest; there was a positive correlation between the soil water holding ca- pacity and soil bulk density. Total soil porosity was sorted into： Broad-leaved mixed forest 〉Pobulus davidiana＋Betula platy- phylla mixed forest〉Betula platyphylla＋Pinus tabulaeformis mixed forest〉Quercus mongolica＋Pinus tabulaeformis mixed forest〉 Larix gmelini ＋ Betula platyphylla mixed forest; average soil maximum moisture capacity was sorting for： Broad-leaved mixed forest〉Betula platyphyUa＋Pinus tabulaeformis mixed forest 〉Pobulus davidiana＋Betula platyphylla mixed forest〉Quercus mon- golica＋Pinus tabulaeformis mixed forest〉Lar/x gmelini ＋ Betula platyphylla mixed forest; the rate of soil stabilization was sort- ed into： Broad-leaved mixed forest〉Betula platyphyUa＋Pinus tabulaeformis mixed forest 〉Lar/x gmelini ＋ Betula platyphyUa mixed forest 〉Pobulus davidiana＋Betula platyphylla mixed forest〉Quercus mongollca＋Pinu tabulaeformis mixed forest, the rela- tionship between soil infiltration rate and infiltration time was a significant power function.