模拟氮沉降对长白山兴安落叶松林土壤有机碳库的短期影响
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摘要
以净月潭国家森林公园兴安落叶松林为研究对象,以NH4NO3为原料模拟4个强度的氮沉降,分析土壤总有机碳(TOC)、易氧化有机碳(ROC)、溶解性有机碳(DOC)和微生物量碳(MBC)的动态变化。研究结果表明:低氮沉降量(L,50 kg N yr~(-1) ha~(-1))提高了TOC、ROC、DOC和MBC浓度,但除MBC外均未达到显著性水平;中氮沉降量(M,100 kg N yr~(-1) ha~(-1))提高了TOC和DOC浓度,降低了ROC和MBC浓度;高氮沉降量(H,150 kg N yr~(-1) ha~(-1))提高了ROC和MBC浓度,降低了TOC和DOC浓度。
Experiments were conducted to examine the effects of nitrogen deposition on total organic carbon(TOC) and its fractions(readily oxidizable carbon, ROC; dissolved organic carbon, DOC; microbial biomass carbon, MBC) of forest soil in northeast China. Four levels of N(NH_4NO_3)-addition treatments comprising control(CK), low(L,50 kg N yr~(-1) ha~(-1)), medium(M,100 kg N yr~(-1) ha~(-1)), high(H,150 kg N yr~(-1) ha~(-1))were conducted in a Larix gmelinii plantation in Jingyuetan National Forest Park. L treatment increased the concentrations of TOC, ROC, DOC and MBC. M treatment increased the concentration of TOC and DOC while reduced the concentration of ROC and MBC. H treatment increased the concentration of ROC and MBC while reduced the concentration of TOC and DOC.
Experiments were conducted to examine the effects of nitrogen deposition on total organic carbon(TOC) and its fractions(readily oxidizable carbon, ROC; dissolved organic carbon, DOC; microbial biomass carbon, MBC) of forest soil in northeast China. Four levels of N(NH_4NO_3)-addition treatments comprising control(CK), low(L,50 kg N yr~(-1) ha~(-1)), medium(M,100 kg N yr~(-1) ha~(-1)), high(H,150 kg N yr~(-1) ha~(-1))were conducted in a Larix gmelinii plantation in Jingyuetan National Forest Park. L treatment increased the concentrations of TOC, ROC, DOC and MBC. M treatment increased the concentration of TOC and DOC while reduced the concentration of ROC and MBC. H treatment increased the concentration of ROC and MBC while reduced the concentration of TOC and DOC.
引文
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[4]Peter,H.G.,Environmental science:nitrogen impacts on forest carbon[J].Nature,2007,447(7146):781-782.
[5]Bedison,J.E.and B.E.Mcneil,Is the growth of temperate forest trees enhanced along an ambient nitrogen deposition gradient[J].Ecology,2009,90(7):1 736-1 742.
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[7]刘建才,陈金玲,金光泽.模拟氮沉降对典型阔叶红松林土壤有机碳和养分的影响[J].植物研究,2014(1):121-130.
[8]汪金松,赵秀海,张春雨.模拟氮沉降对油松林土壤有机碳和全氮的影响[J].北京林业大学学报,2016(10):88-94.
[9]张甲珅,陶澍,曹军.土壤中水溶性有机碳测定中的样品保存与前处理方法[J].土壤通报,2000,31(4):174-176.
[10]Garten C T,Post W M,Hanson P J,et al.Forest soil carbon inventories and dynamics along an elevation gradient in the southern Appalachian Mountains[J].Biogeochemistry,1999,45(2):115-145.
[11]王晶苑,张心昱,温学发.氮沉降对森林土壤有机质和凋落物分解的影响及其微生物学机制[J].生态学报,2013,33(5):1 337-1 346.
[12]张江勇,王娓,曾辉.樟子松人工林细根生产、周转和碳归还对施氮的响应[J].北京大学学报(自然科学版),2018(04):828-838.
[13]陈平,赵博,闫子超.太岳山油松人工林土壤呼吸对模拟氮沉降的短期响应[J].生态学报,2018(22):1-6+8-9.
[14]樊后保,袁颖红,王强.氮沉降对杉木人工林土壤有机碳和全氮的影响[J].福建林学院学报,2007(1):1-6.
[15]姚旭,景航,梁楚涛.人工油松林表层土壤团聚体活性有机碳含量对短期氮添加的响应[J].生态学报,2017,37(20):6 724-6 731.