Effects of red-yellow soil acidification on seed germination of Chinese pine

作     者：TangHS WangRS 

作者机构：ResearchCenterforEco－EnvironmentalsciencesChineseAcademyofSciencesBeijing100085China.E－mail：tanghs@*** ResearchCenterforEco－EnvironmentalsciencesChineseAcademyofSciencesBeijing100085 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2002年第14卷第1期

页      面：115-119页

核心收录：

学科分类：083001[工学-环境科学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

主　　题：aluminum ion germination of Chinese pine red yellow soil soil aggregates soil viscosity 

摘      要：Acid treatments significantly change the physical and chemical properties of red yellow soil by lowering its pH value and leaching out aluminum(Al) ions that are harmful to the growth of plants. The structure of soil will be damaged, resulting in higher viscosity, higher water retention rate and lower air permeability of the soil. The germination rate of Chinese pine( Pinus tabulacformic Carr. ) seeds sowed in soil treated with sulphuric acid(H 2SO 4) decreased compared to that for untreated soil. The direct cause was the large amount of Al ions leached out because of low pH values(≥3.5). The added acid decreased the soil aggregation and increased the number of micro aggregates(under 250 μm in diameter). Such changes increased the soil s viscosity, which tied the pine needles to the soil after the seeds had germinated and prevented the seedlings from fully developing.