钩藤种植对贵州黄壤土壤性状影响研究

为研究贵州酸性黄壤条件下钩藤种植对土壤性质的影响,采集剑河钩藤种植基地及其周边林地、荒草地土壤共30个,分析土壤的物理性质、养分含量、酶活性等16个指标,同时比较根际与非根际土壤的差异。结果表明,与同区域林地和荒草地土壤相比,种植钩藤使土壤微环境pH降低,容重减小,总孔隙度增大,表征土壤持水固肥能力的毛管孔隙度增大,土壤结构得到改善,更利于植物生长,土壤养分得到充分有效利用,酶活性受到一定抑制。因此在贵州山地黄壤条件下,钩藤种植实现了土地利用的经济效益与生态环境效益协调发展。

Research on Yellow Soil Properties with Uncaria rhynchophylla-plant in Guizhou

To study the effects of Uncaria rhynchophylla grow on soil properties in acidic soil of Guizhou, 30 soil samples were collected, including the U. rhynchophylla planting base land, surrounding forest land and wild grassland at Jianhe County, Guizhou, then 16 indexes including soil physical properties, nutrient content and enzyme activity were analyzed, and the differences between rhizosphere and non-rhizosphere soil were compared. The results showed that compared with forestland and grassland soil in the same area, the soil microenvironment of U. rhynchophylla-planting base was different, with lower pH and bulk density, and increased total porosity and capillary porosity of soil water and solid fertilizer capacity. The soil structure was improved, which was more conducive to plant growth, soil nutrient got full and effective use, and the enzyme activity was inhibited. Therefore, under the condition of mountainous geologic environment in Guizhou, U. rhynchophylla planted in yellow soil could get coordinated benefit between land use economic and eco-environment.