季节性冻融对2种温带森林土壤微生物量碳和氮的影响
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摘要
为研究长白山森林土壤微生物量对季节性冻融变化的响应,利用原位培养连续取样法测定了长白山地区2种典型森林土壤在春季和秋季冻融期间微生物量碳(MBC)和微生物量氮(MBN)含量的动态变化。结果表明:2种林型各层次土壤微生物量随冻融格局变化而变化。在春季冻融前期,2种林型各层次土壤微生物量皆表现出升高趋势,而在秋季冻融前期表现出降低现象,在春季和秋季土壤冻融期具有多次爆发式增长而又迅速下降特征,且存在一个或多个微生物量峰值。2种林型上层土壤微生物量多高于下层土壤,且上层土壤在冻融期间变化更加剧烈,而下层土壤各时期微生物量碳、氮比波动情况高于上层土壤。相比长白松林,硬阔叶林各层次土壤微生物量在各冻融时期含量更高。
In order to study the response of soil microbial biomass to seasonal freezing and thawing changes, the dynamic changes of microbial biomass carbon(MBC) and nitrogen(MBN) in the 2 typical forest soils of Changbai Mountain area were determined with in-situ continuous sampling method during the spring and autumn freezing-thawing period. The results showed that soil microbial biomass varied with freezing-thawing pattern in all 2 forest types. The soil microbial biomass in the 2 types of forest types increased at the early stage of spring freezing-thawing, but decreased at the early stage of autumn freezing-thawing. The soil microbial biomass in the two forest types in the spring and autumn freezing-thawing period showed a rapidly increased and then declined trend, and presented one or more peaks. The soil microbial biomass in the upper layer was much higher than that in the lower layer under the 2 forest types, and changed more greatly in the upper layer soil during the freezing and thawing period,while the ratio of MBC/MBN in the lower layer was higher than that in the upper layer soil. Compared with Pinus sylvestriformis, the microbial biomass in each soil layer of hardwood broad-leafed forest was higher during each freezing-thawing period.
In order to study the response of soil microbial biomass to seasonal freezing and thawing changes, the dynamic changes of microbial biomass carbon(MBC) and nitrogen(MBN) in the 2 typical forest soils of Changbai Mountain area were determined with in-situ continuous sampling method during the spring and autumn freezing-thawing period. The results showed that soil microbial biomass varied with freezing-thawing pattern in all 2 forest types. The soil microbial biomass in the 2 types of forest types increased at the early stage of spring freezing-thawing, but decreased at the early stage of autumn freezing-thawing. The soil microbial biomass in the two forest types in the spring and autumn freezing-thawing period showed a rapidly increased and then declined trend, and presented one or more peaks. The soil microbial biomass in the upper layer was much higher than that in the lower layer under the 2 forest types, and changed more greatly in the upper layer soil during the freezing and thawing period,while the ratio of MBC/MBN in the lower layer was higher than that in the upper layer soil. Compared with Pinus sylvestriformis, the microbial biomass in each soil layer of hardwood broad-leafed forest was higher during each freezing-thawing period.
引文
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[14]杨玉莲,吴福忠,何振华,等.雪被去除对川西高山冷杉林冬季土壤微生物生物量碳氮和可培养微生物数量的影响[[J].应用生态学报, 2012, 23(7):1809-1816.
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[17]谭波,吴福忠,杨万勤,等.川西亚高山/高山森林土壤氧化还原酶活性及其对季节性冻融的响应[J].生态学报, 2012, 32(21):6670-6678.
[18]殷睿,蒋先敏,徐振锋,等.季节性雪被对川西亚高山眠江冷杉林冬季土壤氮矿化和淋溶的影响[J].水土保持学报, 2013, 27(5):1-6.
[19] ROBEYT L, JEFFERIES N, ALAN W, et al. Is the decline of soil microbial biomass in late winter coupled to changes in the physical state of cold soils?[J] Soil Biology&Biochemistry, 2010, 42:129-135.
[20]朱国君,尹航,吴明根,等.春季解冻过程对2种温带森林土壤微生物量碳氮和可溶性有机碳氮的影响[J].水土保持学报,2018, 32(1):204-209.
[21] VOROBYOVA E, SOINA V, GORLENKO M, et al. The deep cold biosphere:facts hypothesis[J]. FEMS Microbiology Reviews, 1997, 20:277-290.
[22]苟小林.模拟增温对高山森林土壤碳氮转化的影响[D].四川:四川农业大学.
[2]闫德仁,刘永军,王晶莹,等.落叶松人工林土壤肥力与微生物含量的研究[J].东北林业大学学报, 1996, 24(3):46-50.
[3]陈国潮,何振立,姚槐应.红壤微生物量的季节性变化研究[J].浙江大学学报, 1999 25(4):387-388.
[4] BAUHUS J, BARTSCH N. Mechanisms for carbon and nutrient rel e ase and retention in beech forest gaps[J]. Plant and Soil, 1995,168/169:585-592.
[5]刘庆.亚高山针叶林生态学研究[M]. 2002.成都:四川大学出版社.
[6]魏晶,吴钢,邓红兵.长白山高山冻原生态系统凋落物养分归还功能[J],生态学报, 2004, 24(10):2211-2215.
[7]杨万勤,邓仁菊,张健.森林凋落物分解及其对全球气候变化的响应[J].应用生态学报, 2007, 18(12):2889-2895.
[8] SULKAVA P, HUHTA V. Effects of hard frost and freeze-thaw cycles on decomposer communities and N mineralization in boreal forest soil[J]. Applied Soil Ecology, 2003, 22:225-239.
[9]谭波,吴福忠,秦嘉励,等.川西亚高山、高山森林土壤微生物生物量和酶活性动态特征[J].生态环境学报. 2014, 23(8):1265-1271.
[10] DORSCH P. Overwinter greenhouse gas fluxes in two contrasting agr icultural habitats[J]. Nutrient Cycling in Agro Ecosystems, 2004, 70(2):117-133.
[11]张海燕,张旭东,李军,等.土壤微生物量测定方法概述[J].微生物学杂志, 2005, 25(4):95-98.
[12]王琳.凯氏法测定土壤全氮的方法改进[J].环境监控与预警,2013, 03(7):33-37.
[13] EDWARDS K A, MCCULLOCH J, KERSHAW G P. Soil microbial and nutrient dynamics in a wet Arctic sedge meadow in late winter and early spring[J]. Soil Biology&Biochemistry, 2006, 38(9):2843-2851.
[14]杨玉莲,吴福忠,何振华,等.雪被去除对川西高山冷杉林冬季土壤微生物生物量碳氮和可培养微生物数量的影响[[J].应用生态学报, 2012, 23(7):1809-1816.
[15] HERRMANN A, WITTER E. Sources of C and N contributing to the flush in mineralization upon freeze-thaw cycles in soils[J]. Soil Biology and Biochemistry, 2002, 34(10):1495-1505.
[16] KOPONEN H T, JAAKKOLA T, KEINANEN-TOIVOLA M M, et al. Microbial communities, biomass and activities in soils as affected by freeze thaw cycles[J]. Soil Biology and Biochemistry. 2006, 38(7):1861-1871.
[17]谭波,吴福忠,杨万勤,等.川西亚高山/高山森林土壤氧化还原酶活性及其对季节性冻融的响应[J].生态学报, 2012, 32(21):6670-6678.
[18]殷睿,蒋先敏,徐振锋,等.季节性雪被对川西亚高山眠江冷杉林冬季土壤氮矿化和淋溶的影响[J].水土保持学报, 2013, 27(5):1-6.
[19] ROBEYT L, JEFFERIES N, ALAN W, et al. Is the decline of soil microbial biomass in late winter coupled to changes in the physical state of cold soils?[J] Soil Biology&Biochemistry, 2010, 42:129-135.
[20]朱国君,尹航,吴明根,等.春季解冻过程对2种温带森林土壤微生物量碳氮和可溶性有机碳氮的影响[J].水土保持学报,2018, 32(1):204-209.
[21] VOROBYOVA E, SOINA V, GORLENKO M, et al. The deep cold biosphere:facts hypothesis[J]. FEMS Microbiology Reviews, 1997, 20:277-290.
[22]苟小林.模拟增温对高山森林土壤碳氮转化的影响[D].四川:四川农业大学.
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