广西凤山县退耕还林土壤效应及生态效益评价研究  

Evaluation of Soil Effects and Ecological Benefits of Returning Farmland to Forest in Fengshan County,Guangxi Zhuang Autonomous Region

作　　者：牛辉[1] 庄嘉[1] 胡冬冬[1] 王倩[1] 招礼军[1] 

机构地区：[1]广西大学林学院,广西南宁530005

出　　处：《安徽农业科学》2013年第5期2054-2057,共4页Journal of Anhui Agricultural Sciences

基　　金：广西退耕还林工程建设效益监测(AE180056)

摘　　要：[目的]为退化土壤的生态系统恢复与重建和石漠化治理提供依据。[方法]对广西凤山县土石山丘陵区2种不同退耕还林类型(核桃、八角)进行调查,研究退耕林地0～40 cm土层的理化性质,并以未退耕地(农田)作为对照。[结果]退耕还林10年后,退耕林地土壤剖面结构逐渐完善,土壤容重减小,总孔隙度、饱和含水量和田间持水量增大;土壤有机质含量增加16.6%;土壤有机质平均含量从大到小依次为八角、核桃、农田,土壤速效氮含量以大到小依次为八角、核桃;土壤全氮平均含量从大到小依次为核桃、八角。从拦蓄保护水资源价值与森林保持水土价值2个方面计算,凤山县退耕还林工程土壤生态效益价值超过2.8亿元。[结论]退耕还林的潜在价值巨大,所以有必要加强退耕还林工程的建设力度。[Objective]The research aimed to provide the basis for the recovery and the reconstruction of degraded soil ecosystem.[Method]The effects of two kinds of returning farmland to forest（walnut and star anise）on soil characteristics were investigated in mountain of rocky and hilly,Fengshan County,Guangxi Zhuang Autonomous Region.The physicochemical properties of the soils（0-40 cm） were studied,and the farmland was taken as contrast.[Result]The soil profile structure was gradually improved,the soil bulk density reduced,and the total porosity,saturated water content increased after returning farmland to forest.Meanwhile,the soil organic content increased by 16.6%.The average content of the soil organic showed star anisewalnutfarmland,and the average available nitrogen content showed star anisewalnut,and the total nitrogen content showed walnutstar Anise.The ecological benefit value was more than 0.28 billion yuan in protection of water resource and the value of soil and water conservation.[Conclusion]The potential value of returning farmland to forest was huge,so it was necessary to strengthen the construction force of the engineer of returning farmland to forest.

关 键 词：退耕还林 凤山县 土壤理化性质 生态效益 

分 类 号：S157.2[农业科学—土壤学]