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以重庆缙云山国家级自然保护区的楠竹林为研究对象,并以广泛分布的常绿阔叶林作为对照,对楠竹林和常绿阔叶林内土壤第1层表土(A)0~5cm,第2层(B)20~30cm,第3层(C)50~60cm的土壤容重等土壤水分物理性质、全氮、有效氮进行了测定。结果表明:随着土层深度、土壤容重的增加,阔叶林的第2、3层高于楠竹林;土壤孔隙度随着土层的增加而减小,楠竹林土壤孔隙度高于阔叶林;土壤毛管持水力、田间持水力、自然含水量阔叶林的表层大于楠竹林,楠竹林的第2、3层高于阔叶林;楠竹林的土壤质地较阔叶林疏松多孔,渗水、保水效果好;土壤全氮、有效性氮随土层的增加而减小,阔叶林表土层稍高于楠竹林,楠竹林第2、3层高于阔叶林。
Taking the bamboo forest in Chongqing Jinyun Mountain National Nature Reserve as the research object and the widely distributed evergreen broad-leaved forest as the control, the soil layer 0 ~ 5cm in the top layer of soil (A) in the bamboo forest and the evergreen broad- The physical properties of soil moisture, total nitrogen, and available nitrogen were measured in the second layer (B) of 20 ~ 30cm and the third layer (C) of 50 ~ 60cm soil bulk density. The results showed that with the increase of soil depth and soil bulk density, the second and third layers of broad-leaved forest were higher than that of Phyllostachys pubescens forest. The soil porosity decreased with the increase of soil layer. Forest; soil capillary holding water, field water holding capacity, natural water content of broad-leaved forest surface than the bamboo forest, bamboo forest layer 2 and 3 higher than the broad-leaved forest; bamboo forest soil texture more broad-leaved forest porous, seepage , And the water retention effect is good. Soil total nitrogen and available nitrogen decrease with the increase of soil layer, the surface layer of broad-leaved forest is slightly higher than that of the bamboo forest, and the second and third layers of the bamboo forest are higher than the broad-leaved forest.