植物凋落物分解对土壤化学性质的影响

Impact of plant litter decomposition on soil chemical property

为了了解凋落物分解对土壤性质的影响,采用控制试验的方式,研究了几种常见植物凋落物分解对土壤化学性质的影响,结果表明:凋落物分解对土壤pH值影响较小,灌木、草本植物凋落物分解对土壤养分含量的影响相对较大,针叶树种凋落物分解对土壤养分含量的影响相对较小;草本植物分解后,土壤pH值较对照下降了0.07,土壤有机质、碱解氮、速效磷、速效钾、全氮、全磷、全钾含量分别较对照上升了52.34%、7.31%、2.60%、13.36%、2.77%、3.64%、2.81%。

In order to understand the impact of plant litter decomposition on soil properties,the method of local control was adopted to investigate the impacts of several plants litter decomposition on soil chemical properties.The results showed that the effect of plant litter decomposition was small on soil pH value;The decomposition of herb and shrub litters had a great impact on soil chemical properties,while the decomposition of coniferous litter had a small impact on soil chemical properties.For example with herb,the soil pH value increased by 0.07 after herb litter decomposition,with the content of soil organic matter,soil available N,soil available P,soil available K,soil total N,soil total P,soil total K had reduced by52.34%,7.31%,2.60%,13.36%,2.77%,3.64%,and 2.81%,respectively.