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当前位置: 首页 > 文章 > 凋落物处理对不同林龄华北落叶松针阔混交林土壤磷组分的影响 生态学杂志 2019 (10) 3024-3032
Position: Home > Articles > Effects of litter manipulation on soil phosphorus fractions in Larix principis-rupprechtii conifer and broadleaved forests at different ages Chinese Journal of Ecology 2019 (10) 3024-3032

凋落物处理对不同林龄华北落叶松针阔混交林土壤磷组分的影响

作  者：
刘旭军;田慧霞;程小琴;刘莉;韩海荣
单  位：
北京林业大学森林资源生态系统过程北京市重点实验室
关键词：
磷组分;土壤微生物生物量磷;酸性磷酸酶活性;胸高断面积;有机碳
摘  要：
磷(P)是维持植物生长发育的重要营养元素。营造混交林能更好地维持人工林的生产力。了解混交林在不同发育阶段土壤磷组分变化及其影响因素,对人工林的可持续经营意义重大。本文采用Tiessen改良的Hedley磷分级方法,比较了不同林龄(幼龄林15a,中龄林26 a)和凋落物处理(原状CK,去除凋落物NL,加倍凋落物DL,去除根系和凋落物NRL)下华北落叶松(Larix principis-rupprechtii)针阔混交林土壤磷组分特征及其影响因素。结果表明:华北落叶松针阔混交林15 a和26 a土壤磷组分、土壤微生物生物量磷和酸性磷酸酶活性差异显著(P<0.05);与15 a混交林相比,26 a混交林土壤活性磷(Resin-Pi、NaHCO3-Pi、NaHCO3-Po)含量显著提高,土壤磷素有效性提高; NaOH-Po含量显著降低(P<0.05);与对照CK相比,DL能显著增加土壤活性磷(Resin-Pi、NaHCO3-Pi、NaHCO3-Po)和中活性磷(NaOH-Pi和NaOH-Po)含量,NL和NRL显著降低土壤(Resin-Pi、NaHCO3-Pi、NaHCO3-Po)和中活性磷(NaOH-Pi和NaOH-Po)含量(P <0. 05);稳定态磷(稀HCl-Pi、浓HCl-Pi和浓HCl-Po)和残留态磷(Residual-P)在不同林龄和凋落物处理下差异不显著(P>0.05)。冗余分析显示,土壤微生物生物量磷、酸性磷酸酶活性、植物生长(平均胸高断面积)和有机碳含量是影响不同林龄和凋落物处理下土壤磷组分变化的主导因子。
译  名：
Effects of litter manipulation on soil phosphorus fractions in Larix principis-rupprechtii conifer and broadleaved forests at different ages
作  者：
LIU Xu-jun;TIAN Hui-xia;CHENG Xiaoqin;LIU Li;HAN Hai-rong;Forestry College of Beijing Forestry University;
关键词：
phosphorus fraction;;soil microbial biomass phosphorus;;acid phosphatase activity;;basal area;;organic carbon
摘  要：
Phosphorus( P) is an important nutrient for plant growth and development. Mixed forests can better maintain the productivity of plantations. Understanding the characteristics and influencing factors of soil P fractions in mixed forests at different developmental stages is of great significance for the sustainable management of plantations. In this study,the Tiessen modified Hedley P fractionation method was used to extract soil samples and investigated the characteristics of soil P fractions with different stand ages( young forest,15 years old; middle-aged forest,26 years old) and litter manipulation( control,CK; litter removal,NL; litter double,DL; removal of litter and roots,NRL) in Larix principis-rupprechtii conifer and broadleaved forest. The results showed that there were significant differences of soil P fraction,soil microbial biomass P and acid phosphatase activity between the young and middle-aged forests( P < 0.05). Compared with the15 years old forest,the contents of soil labile P( Resin-Pi,NaHCO3-Pi,NaHCO3-Po) in the 26 years old forest were higher,while the contents of NaOH-Po were lower( P < 0.05). Compared with the CK treatment,DL treatment significantly increased the contents of soil labile P( ResinPi,NaHCO3-Pi and NaHCO3-Po) and middle labile P( NaOH-Pi and NaOH-Po)( P < 0.05).NL and NRL treatments significantly reduced the contents of soil Resin-Pi, NaHCO3-Pi,NaHCO3-Po,NaOH-Pi and NaOH-Po( P<0.05). There was no significant difference in stable P( dilute HCl-Pi,concentrated HCl-Pi and concentrated HCl-Po) and residual P across different stand ages and litter treatments( P>0.05). The results of redundancy analysis showed that changes in P fractions were mainly driven by soil microbial biomass P,acid phosphatase activity,plant growth( average basal area),and organic carbon content under different aged stands and litter treatments.

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