發(fā)布時(shí)間：2018-04-20 02:28

  本文選題：甲烷通量 + 土壤溫度��； 參考：《中南林業(yè)科技大學(xué)學(xué)報(bào)》2017年09期

【摘要】：以湖南省莽山地區(qū)4種典型森林類型(闊葉混交林、針闊混交林、常綠闊葉林及山地矮林)為研究對(duì)象,采用靜態(tài)箱-氣相色譜法觀測(cè)4種森林類型土壤CH_4通量,比較其CH_4通量的動(dòng)態(tài)及影響因子。結(jié)果表明:在生長(zhǎng)季,4種森林類型甲烷通量總體上表現(xiàn)為匯,其大小順序?yàn)槌＞G闊葉林(-10.290 9±9.900 5μg·m~(-2)h~(-1))山地矮林(-14.175 8±11.559 0μg·m~(-2)h~(-1))闊葉混交林(-17.115 5±11.074 8μg·m~(-2)h~(-1))針闊混交林(-23.700 2±10.484 7μg·m~(-2)h~(-1));除針闊混交林外,甲烷通量與土壤含水量無(wú)顯著的相關(guān)性,4種森林類型甲烷通量均與土壤溫度呈顯著的負(fù)相關(guān);甲烷通量對(duì)土壤養(yǎng)分的響應(yīng)出現(xiàn)差異:山地矮林甲烷通量與土壤全氮、全磷呈顯著正相關(guān);常綠闊葉林甲烷通量與土壤有機(jī)碳呈顯著負(fù)相關(guān),與土壤全氮顯著正相關(guān),其他兩種森林類型甲烷通量均與全氮呈顯著正相關(guān),說(shuō)明土壤溫度和土壤全氮是影響莽山地區(qū)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. 緇撴灉琛ㄦ槑:鍦ㄧ敓闀垮,4縐嶆．鏋楃被鍨嬬敳鐑烽，

本文編號(hào)：1775849