冀北山地華北落葉松人工林與白樺混交改造模式對(duì)土壤動(dòng)物群落的影響
發(fā)布時(shí)間:2019-06-03 03:40
【摘要】:【目的】研究冀北山地華北落葉松人工林與白樺的不同混交經(jīng)營(yíng)模式對(duì)土壤動(dòng)物群落結(jié)構(gòu)及功能群的影響,為落葉松人工林混交經(jīng)營(yíng)及可持續(xù)管理提供理論依據(jù)!痉椒ā恳约奖鄙降芈淙~松人工純林(CK)及其與白樺的幼齡同齡株間混交林(M_1)和異齡帶狀混交林(M_2)為對(duì)象,于2013年5,7,9月用手揀法和Tullgren漏斗分離法調(diào)查土壤動(dòng)物群落,并依據(jù)食性將其劃分為腐食性、肉食性、植食性與雜食性4個(gè)功能群;分析2種混交模式對(duì)土壤動(dòng)物群落結(jié)構(gòu)、多樣性及功能群組成的影響差異!窘Y(jié)果】共獲得土壤動(dòng)物70類49 106頭,其中大型土壤動(dòng)物50類2 802頭,蟻科、象甲科幼蟲(chóng)和長(zhǎng)角亞目幼蟲(chóng)為優(yōu)勢(shì)類群;中小型土壤動(dòng)物33類46 304頭,蜱螨目與彈尾目占絕對(duì)優(yōu)勢(shì);旖唤(jīng)營(yíng)6年后,M_2對(duì)土壤動(dòng)物群落影響顯著,其中大型土壤動(dòng)物類群數(shù)與平均密度均顯著高于CK(P0.05),中小型土壤動(dòng)物類群數(shù)顯著高于M_1(P0.05);混交改造模式、時(shí)間和土層對(duì)土壤動(dòng)物類群數(shù)的影響顯著(P0.05),對(duì)平均密度的影響較小;旖唤(jīng)營(yíng)后,土壤動(dòng)物群落的各多樣性指數(shù)提高,其中M1中Shannon-Wiener多樣性指數(shù)(H)和Pielou均勻性指數(shù)(J)均顯著高于CK(P0.05);密度-類群指數(shù)(DG)在不同混交模式間表現(xiàn)出極顯著差異(P0.01)。腐食性土壤動(dòng)物平均密度在4個(gè)功能群中所占比例最高;M_2內(nèi)的腐食性、肉食性與植食性土壤動(dòng)物類群數(shù)均顯著高于CK(P0.05)。冗余度分析(RDA)顯示,凋落物層土壤動(dòng)物分布受凋落物有機(jī)碳含量影響顯著(P=0.048);土壤層土壤動(dòng)物分布則受土壤有機(jī)碳含量(P=0.006)、全氮含量(P=0.02)和土壤密度(P=0.044)影響顯著。【結(jié)論】冀北山地華北落葉松人工林與白樺混交經(jīng)營(yíng)后,通過(guò)改變凋落物的組成、數(shù)量及土壤理化性質(zhì),可改善土壤動(dòng)物群落的組成、結(jié)構(gòu)及多樣性,6年的短期異齡混交改造使林內(nèi)土壤動(dòng)物顯示出較高的多樣性水平。
[Abstract]:[objective] to study the effects of different mixed management models of Larix gmelinii plantation and Bai Hua on the community structure and functional group of soil animals in the mountainous area of northern Hebei. To provide theoretical basis for mixed management and sustainable management of Larix gmelinii plantation. [methods] the pure larch plantation (CK) and its young interplant mixed forest with Bai Hua (M 鈮,
本文編號(hào):2491637
[Abstract]:[objective] to study the effects of different mixed management models of Larix gmelinii plantation and Bai Hua on the community structure and functional group of soil animals in the mountainous area of northern Hebei. To provide theoretical basis for mixed management and sustainable management of Larix gmelinii plantation. [methods] the pure larch plantation (CK) and its young interplant mixed forest with Bai Hua (M 鈮,
本文編號(hào):2491637
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