植物园林下土壤物理性质分析  

Analysis of soil physical properties of botanical garden forest

作　　者：景美清 吴裕建 JING Meiqing;WU Yujian(Institute of Eco-environmental and Soil Sciences,Guangdong Academy of Sciences,Cuangzhou 510650,China;Guangzhou Shuangmu Forestry Co.,Ltd.,Guangzhou 510520,China)

机构地区：[1]广东省科学院生态环境与土壤研究所,广东广州510650 [2]广州双木林业有限公司,广东广州510520

出　　处：《安徽农学通报》2024年第22期74-77,共4页Anhui Agricultural Science Bulletin

摘　　要：本试验以深圳仙湖植物园具有代表性的次生林、土沉香林、马占相思纯林和马占相思混交林4种林分为研究对象,设置固定样地采样,分析土壤剖面情况,测定其林下土壤的物理性质,包括土壤容重、孔隙度和水文特性,揭示城市植物园典型森林不同林分土壤物理性质的差异。结果表明,4种林分中,次生林的肥力相对较高,各林分土壤的淀积层相对较厚;次生林和土沉香林的土壤容重较为适宜;次生林的土壤孔隙度较高;次生林的各土层土壤饱和持水率和毛管持水率均较高,其土壤质量较高,林地上植物生长状态可能较佳。综上,次生林各土层土壤的肥力、土壤容重、土壤孔隙度、饱和持水率和毛管持水率均较高,其土壤质量较高,有利于植物生长。研究结果为森林土壤可持续利用提供参考。4 representative forest stands in Shenzhen Xianhu Botanical Garden:secondary forest,Aquilaria sinensis forest,Acacia mangium forest,and mixed Acacia mangium forest were regarded as research subjects.Fixed sampling sites were set up to analyze the soil profile situation and measure the physical properties of the soil under the forest,included soil bulk density,porosity,and hydrological characteristics,revealing the differences in soil physical properties among different forest stands in typical urban forests.The results indicated that among the 4 forest stands,the fertility of secondary forest was relatively high,and the sediment layer of soil in each forest stand was relatively thick;The soil bulk density of secondary forest and Aquilaria sinensis forest was relatively suitable;The soil porosity of secondary forest was relatively high;The saturated water holding capacity and capillary water holding capacity of each soil layer in secondary forests were relatively high,indicating high soil quality and possibly better growth status of plants on the forest.In summary,the soil fertility,bulk density,porosity,saturated water holding capacity,and capillary water holding capacity of each soil layer in secondary forest were relatively high,indicating a high soil quality that was conducive to plant growth.The research results provided references for the sustainable utilization of forest soil.

关 键 词：城市森林 林分结构 土层结构 土壤物理性质 

分 类 号：S714.2[农业科学—林学]