本文關(guān)鍵詞： 土壤碳氮儲(chǔ)量 土壤可溶性有機(jī)碳氮 土壤微生物量碳氮 去除根系 去除凋落物 濱海沙地　出處：《生態(tài)學(xué)報(bào)》2017年12期 　論文類型：期刊論文

【摘要】：以福建長(zhǎng)樂濱海沙地上3種人工林(尾巨桉、紋莢相思、木麻黃)土壤為研究對(duì)象,設(shè)置去除凋落物、去除根系和對(duì)照3種處理,觀測(cè)1年后分析改變地上、地下有機(jī)質(zhì)輸入對(duì)沙地土壤碳氮儲(chǔ)量、可溶性有機(jī)碳(DOC)氮(DON)和微生物量碳(MBC)氮(MBN)的影響。結(jié)果表明:不同樹種人工林間土壤碳氮儲(chǔ)量無顯著差異;不同樹種人工林間土壤活性碳氮組分差異顯著,木麻黃土壤DOC含量顯著高于紋莢相思,紋莢相思土壤DON顯著高于木麻黃和尾巨桉,尾巨桉土壤MBN顯著高于木麻黃和紋莢相思。改變地上地下有機(jī)質(zhì)輸入對(duì)濱海沙地土壤碳氮庫(kù)有顯著影響且這種影響隨樹種而異。去除凋落物后紋莢相思、木麻黃土壤碳儲(chǔ)量分別下降38.0%、25.1%,氮儲(chǔ)量分別下降12.9%、12.5%;去除凋落物后尾巨桉、紋莢相思、木麻黃土壤DOC分別下降37.5%、30.6%、52.9%,MBC分別下降31.0%、56.9%、29.7%,MBN分別下降50.7%、34.9%、42.2%;去除根系后尾巨桉、紋莢相思土壤MBC分別下降57.7%、15.4%�；貧w分析顯示,濱海沙地土壤DOC、MBC與土壤碳儲(chǔ)量呈顯著正相關(guān),土壤DOC和MBC分別能夠解釋土壤碳儲(chǔ)量變化的47.7%和57.7%。研究表明:樹種通過調(diào)控地上、地下輸入影響可溶性有機(jī)碳氮和微生物量碳氮,進(jìn)而影響土壤碳氮庫(kù)。
[Abstract]:Three artificial forests (Eucalyptus urophylla, Acacia acacia, Casuarina equisetifolia) on coastal sandy land of Changle, Fujian Province were studied. Litter removal, root removal and control were set up to analyze and change the ground after one year observation. Soil carbon and nitrogen storage in sandy land by underground organic matter input. The effects of soluble organic carbon (DOC) nitrogen (DOC) and microbial biomass (MBC) nitrogen (MBN) were studied. The results showed that there was no significant difference in soil carbon and nitrogen storage among different tree species. The content of DOC in soil of Casuarina equisetifolia was significantly higher than that of Acacia acacia, and the DON in soil of Acacia equisetifolia was significantly higher than that of Casuarina equisetifolia and Eucalyptus grandis. The soil MBN of Eucalyptus grandis was significantly higher than that of Casuarina equisetifolia and Acacia acacia. Changing the above ground organic matter input had a significant effect on soil carbon and nitrogen pool in coastal sandy land and the effect varied with tree species. Soil carbon storage of Casuarina equisetifolia decreased by 38.0% and 25.1%, and nitrogen storage decreased by 12.9% and 12.5%, respectively, in Casuarina equisetifolia soil. The DOC of Eucalyptus grandis, Acacia acacia and Casuarina equisetifolia soil decreased by 37.5% and 30.6%, 52.9% respectively. MBN decreased 50.7% and 34.9%, 42.2%; After removing root system, the MBC of Acacia acacia soil decreased 57.7% and 15.4%, respectively. Regression analysis showed that there was a significant positive correlation between soil MBC and soil carbon storage in coastal sandy land. Soil DOC and MBC could explain the variation of soil carbon storage by 47.7% and 57.7 respectively. The results showed that the tree species affected soluble organic carbon nitrogen and microbial biomass carbon nitrogen by controlling the aboveground and underground input. And then affect the soil carbon and nitrogen pool.
【作者單位】： 福建農(nóng)林大學(xué)林學(xué)院;國(guó)家林業(yè)局杉木工程技術(shù)研究中心;福建師范大學(xué)地理科學(xué)學(xué)院;濕潤(rùn)亞熱帶山地生態(tài)國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地;福建農(nóng)林大學(xué)園藝學(xué)院;福建省長(zhǎng)樂大鶴國(guó)有防護(hù)林場(chǎng);
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(31570604,41371269) 福建省林業(yè)科技項(xiàng)目(閩林科[2012]3號(hào)) 福建農(nóng)林大學(xué)部級(jí)創(chuàng)新平臺(tái)資助
【分類號(hào)】：S714
【正文快照】： 1福建農(nóng)林大學(xué)林學(xué)院,福州3500022國(guó)家林業(yè)局杉木工程技術(shù)研究中心,福州3500023福建師范大學(xué)地理科學(xué)學(xué)院,福州3500074濕潤(rùn)亞熱帶山地生態(tài)國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地,福州3500075福建農(nóng)林大學(xué)園藝學(xué)院,福州3500026福建省長(zhǎng)樂大鶴國(guó)有防護(hù)林場(chǎng),長(zhǎng)樂350212Short-term effects of ro

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