不同造林模式对退化石灰岩山地土壤理化性质及水文效应的影响

Influence of Different Afforestation Models on Soil Physical and Chemical Properties and Hydrological Effect in Degradation Limestone Mountain

为研究不同造林模式对鲁中南退化石灰岩山地土壤的恢复效果,以该区域不同造林模式人工幼林为研究对象,运用样方调查与室内实验相结合的方法,以造林前数据(CK)作为对照,对比分析了蒙阴县刘家峪村小流域4种造林模式下的土壤理化性质。结果表明:(1)4种造林模式下土壤的理化性质相比于造林前均有明显改善;(2)刺槐黄栌混交林的土壤容重最低,孔隙度最大,饱和含水量最高,侧柏连翘混交林的容重大、孔隙性最小、持水性差;(3)刺槐黄栌混交林的土壤有机质、全氮、全磷、全钾、速效磷、速效氮、速效钾含量最高;(4)不同造林模式的土壤入渗能力表现为刺槐黄栌混交林>侧柏五角枫混交林>五角枫臭椿混交林>侧柏连翘混交林>CK。综合考虑4种造林模式对土壤理化性质的改良效果来看,刺槐黄栌混交模式更适合在研究区栽植。

In order to study the restoration effects of different afforestation models on degradation limestone mountains of central-southern Shandong province,we took the young plantations which were afforested in different models in this area as the research object,combined the sampling investigation and laboratory analysis as research method.Meanwhile we took the data gained before afforestation as control（CK）,and compared the soil physical and chemical properties under 4different afforestation models of Liujiayu country in Shandong province.Results showed that：（1）When compared to the period ahead afforestation the soil physical and chemical properties of 4plantations afforested in different models had significant improvement.（2）Robinia and smoke tree mixed forest had the minimum soil bulk density,maximum porosity and maximum water content while orientalis and forsythia mixed forest had maximum soil bulk density,minimum porosity and worst water binding capacity.（3）Robinia and smoke tree mixed forest had the maximum content of soil organic matter,total N,total P,total K,available N,available P and available K.（4）The soil infiltration capacity of different afforestation showed robinia and smoke tree mixed forest〉oriental arborvitae and acer mono maxim mixed forest〉acer mono maxim and ailanthus mixed forest〉oriental arborvitae and forsythia mixed forest〉CK.The robinia and smoke tree mixed forest was much more suitable for this area for a comprehensive consideration of the improvement effect to the soil physical and chemical properties.