广东林业科技
廣東林業科技
엄동임업과기
FORESTRY SCIENCE AND TECHNOLOGY OF GUANGDONG PROVINCE
2014年
5期
43-47
,共5页
苏木荣%张卫强%冼伟光%唐洪辉%殷祚云%陈伟光%许雄坚%盘李军
囌木榮%張衛彊%冼偉光%唐洪輝%慇祚雲%陳偉光%許雄堅%盤李軍
소목영%장위강%승위광%당홍휘%은조운%진위광%허웅견%반리군
不同林龄针阔混交林%土壤理化性质%相关分析
不同林齡針闊混交林%土壤理化性質%相關分析
불동림령침활혼교림%토양이화성질%상관분석
conifer-broadleaved mixed forest with different age%physical and chemical characteristics of soil%correlation analysis
森林发育对土壤理化性质有着重要的影响。在南亚热带，以杉木皆伐改造林地3个林龄段（3～5 a、7～9 a和10～11 a）的针阔混交林为研究对象，研究了土壤理化性质的变化特征以及不同理化性质指标之间的相关性。结果表明，土壤容重、总孔隙度、毛管孔隙度随林龄的增加呈上升趋势，而非毛管孔隙度和土壤通气度表现为先升高后降低。土壤pH值、有机质、全N、全P、全K、水解N、速效K随林龄的增加呈现出先降低后升高的趋势，而有效P处于下降的趋势。相关分析表明，不同林龄段针阔混交林的土壤容重主要取决于土壤有机质含量，自然含水量主要取决于毛管孔隙度；土壤有机质含量与全N和水解N相关性最高，土壤中绝大部分N素以有机态存在；而土壤有效P含量主要取决于土壤有机质含量，同时受土壤pH值影响也较大。
森林髮育對土壤理化性質有著重要的影響。在南亞熱帶，以杉木皆伐改造林地3箇林齡段（3～5 a、7～9 a和10～11 a）的針闊混交林為研究對象，研究瞭土壤理化性質的變化特徵以及不同理化性質指標之間的相關性。結果錶明，土壤容重、總孔隙度、毛管孔隙度隨林齡的增加呈上升趨勢，而非毛管孔隙度和土壤通氣度錶現為先升高後降低。土壤pH值、有機質、全N、全P、全K、水解N、速效K隨林齡的增加呈現齣先降低後升高的趨勢，而有效P處于下降的趨勢。相關分析錶明，不同林齡段針闊混交林的土壤容重主要取決于土壤有機質含量，自然含水量主要取決于毛管孔隙度；土壤有機質含量與全N和水解N相關性最高，土壤中絕大部分N素以有機態存在；而土壤有效P含量主要取決于土壤有機質含量，同時受土壤pH值影響也較大。
삼림발육대토양이화성질유착중요적영향。재남아열대，이삼목개벌개조임지3개림령단（3～5 a、7～9 a화10～11 a）적침활혼교림위연구대상，연구료토양이화성질적변화특정이급불동이화성질지표지간적상관성。결과표명，토양용중、총공극도、모관공극도수림령적증가정상승추세，이비모관공극도화토양통기도표현위선승고후강저。토양pH치、유궤질、전N、전P、전K、수해N、속효K수림령적증가정현출선강저후승고적추세，이유효P처우하강적추세。상관분석표명，불동림령단침활혼교림적토양용중주요취결우토양유궤질함량，자연함수량주요취결우모관공극도；토양유궤질함량여전N화수해N상관성최고，토양중절대부분N소이유궤태존재；이토양유효P함량주요취결우토양유궤질함량，동시수토양pH치영향야교대。
Forest development has great influence on physical and chemical characteristics of soil.A study was conducted on variation of soil physical and chemical characteristics and correlations between these indicators in conifer-broadleaved mixed plantations in southern subtropical region.These conifer-broadleaved mixed plantations which developed from clearcutting Cunninghamia lanceolata plantation were in different age group (3-5 ,7-9 and 1 0-1 1 years old).The results were as following:soil bulk density,total porosities and capillary porosities in-creased,while non-capillary porosities and soil aeration capacity first increased and then decreased with increasing forest age.The pH of soil,soil organic matter,total N,total P,total K,hydrolysable N,available K first de-creased and then increased,while available P decreased with increasing forest age.The correlation analysis showed that soil bulk density depended on soil organic matter content for conifer-broadleaved mixed forest in southern sub-tropical region,while soil natural water content mainly depended on capillary porosities.Soil organic matter content was highly correlated with total N and hydrolysable N content,indicating that N in the soil organic matter existed mainly in the form of organic nitrogen.The available P content mainly depended on soil organic matter content,and was influenced by soil pH value.
