湖南莽山4种林型甲烷通量及其影响因子
发布时间:2018-04-20 02:28
本文选题:甲烷通量 + 土壤温度 ; 参考:《中南林业科技大学学报》2017年09期
【摘要】:以湖南省莽山地区4种典型森林类型(阔叶混交林、针阔混交林、常绿阔叶林及山地矮林)为研究对象,采用静态箱-气相色谱法观测4种森林类型土壤CH_4通量,比较其CH_4通量的动态及影响因子。结果表明:在生长季,4种森林类型甲烷通量总体上表现为汇,其大小顺序为常绿阔叶林(-10.290 9±9.900 5μg·m~(-2)h~(-1))山地矮林(-14.175 8±11.559 0μg·m~(-2)h~(-1))阔叶混交林(-17.115 5±11.074 8μg·m~(-2)h~(-1))针阔混交林(-23.700 2±10.484 7μg·m~(-2)h~(-1));除针阔混交林外,甲烷通量与土壤含水量无显著的相关性,4种森林类型甲烷通量均与土壤温度呈显著的负相关;甲烷通量对土壤养分的响应出现差异:山地矮林甲烷通量与土壤全氮、全磷呈显著正相关;常绿阔叶林甲烷通量与土壤有机碳呈显著负相关,与土壤全氮显著正相关,其他两种森林类型甲烷通量均与全氮呈显著正相关,说明土壤温度和土壤全氮是影响莽山地区甲烷通量的主要因素。
[Abstract]:Four typical forest types (broad-leaved mixed forest, coniferous broad-leaved forest, evergreen broad-leaved forest and mountain dwarf forest) were studied. The soil CH_4 fluxes of four forest types were measured by static box-gas chromatography. The dynamics and influence factors of CH_4 flux were compared. 缁撴灉琛ㄦ槑:鍦ㄧ敓闀垮,4绉嶆.鏋楃被鍨嬬敳鐑烽,
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