凋落物输入改变对暖温带栓皮栎林表层土壤有效磷的影响  

Effect of Different Litter Input Treatment on Available Phosphorus of Surface Soil of A Quercus variabilis Forest in Warm Temperate Zone

作　　者：韩中海[1] 李会平[2] 刘新轩 史贝贝[2] 吴明作[2] HAN Zhonghai;LI Huiping;LIU Xinxuan;SHI Beibei;WU Mingzuo(Administration center of returning farmland to forest project and natural forest protection,Henan Province,Zhengzhou 450003,China;College of Forestry,Henan Agricultural University,Zhengzhou 450002,China;Forestry Bureau of Ruyang County,Ruyang 471200,China)

机构地区：[1]河南省退耕还林和天然林保护工程管理中心,河南郑州450003 [2]河南农业大学林学院,河南郑州450002 [3]汝阳县林业局,河南汝阳471200

出　　处：《生态环境学报》2020年第6期1109-1115,共7页Ecology and Environmental Sciences

基　　金：国家退耕还林生态效益监测基金项目(2008—2019);中国科学院战略性先导科技专项(XDA0505020305-1)。

摘　　要：利用河南汝阳1 hm2森林生态系统定位观测样地,设置加倍凋落物(DL)、去除凋落物(NL)与对照(CK)3种处理,连续2 a测定0—10、10—20 cm层次土壤有效磷含量,旨在阐明暖温带栓皮栎林近地表层土壤有效磷受凋落物输入改变的影响程度,为人工林生态系统的经营管理及其对全球气候变化的响应对策提供基础。结果显示:土壤有效磷质量分数年际变化不明显,其变化速率在处理1 a后波动幅度减小;环比增长率在0—10 cm土层变动幅度比10—20 cm土层的平缓,但各层次各处理的差异不显著;季节变化上,春秋季较低、冬季较高。0—10 cm土层的土壤有效磷含量稍高于10—20 cm土层,但差异不显著;0—10 cm土层上,加倍凋落物处理提高了土壤有效磷含量,去除凋落物处理降低了土壤有效磷含量,两种处理之间的土壤有效磷质量分数及其变化速率的差异显著,但与对照的差异均不显著;10—20 cm土层各处理间的差异不显著。研究表明,凋落物输入改变主要影响到0—10 cm土层的土壤有效磷含量,对10—20 cm土层的影响较弱。In order to clarify the impact of litter input change on the available phosphorus of surface soil in Quercus variabilis forest in the warm temperate zone,and to provide reference for the management of artificial forest ecosystems and their response to global climate change,a 1 hm2 forest ecosystem long term observation stand of Quercus variabilis forest in Ruyang County,Henan Province were selected as the research objects.The DIRT(detritus input removal and transfer)experiment with 3 treatments were set up,including DL(double litter,i.e.twice aboveground litter inputs),NL(no litter,i.e.aboveground litter excluded from plots)and CK(control,normal litter inputs).The content of soil available phosphorus of 0–10 cm and 10–20 cm soil layers were measured for 2 continuous years.The results showed that the available phosphorus mass fraction had no significant annual change,and the fluctuation range of its change velocity narrowed after 1a treatment,but there were still some fluctuations after 2 a treatment.The month to month growth rate of soil available phosphorus mass fraction had narrower fluctuation range in 0–10 cm than in 10–20 cm,but there was no significant difference between the 2 soil layers and among the 3 treatments.The available phosphorus mass fraction had the obvious seasonal change characteristic,i.e.lower in spring and autumn,higher in winter.Soil available phosphorus mass fraction in the 0–10 cm layer was slightly higher than that in 10–20 cm layer,while there was no significant difference.At 0–10 cm soil layer,DL treatment increased available phosphorus mass fraction,while NL treatment reduced available phosphorus mass fraction.Further,soil available phosphorus mass fraction and its change rate between DL and NL were significant,but the difference between the two treatments and CK was not significant.In addition,there was no significant difference among the 3treatments in 10–20 cm soil layer.In conclusion,different treatments of litter input mainly affect the soil available phosphorus

关 键 词：凋落物输入 土壤有效磷 DIRT 栓皮栎林 

分 类 号：S718.516[农业科学—林学] X17[环境科学与工程—环境科学]