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当前位置: 首页 > 文章 > ~(14)C、~(15)N双标记秸秆对土壤微生物量碳、氮动态变化的影响 江苏农业学报 1999 (3) 173-176
Position: Home > Articles > Influence of ~(14)C and ~(15)N labelled Straw Application on Dynamics of Soil Microbial Biomass C and N Jiangsu Journal of Agricultural Sciences 1999 (3) 173-176

~(14)C、~(15)N双标记秸秆对土壤微生物量碳、氮动态变化的影响

作  者：
王志明;朱培立;黄东迈
单  位：
江苏省农业科学院土壤肥料研究所
关键词：
秸秆;土壤微生物量碳;土壤微生物量氮
摘  要：
用密闭培养和熏蒸提取法，研究１４ Ｃ、１ ５ Ｎ 标记秸秆对红壤和变性土中原有土壤微生物量及其 Ｃ／ Ｎ 动态变化的影响。结果表明，施加秸秆可增加原有土壤微生物量，原有土壤微生物量 Ｃ和 Ｎ 在培养初期很快即达最大值，以后逐渐减少并趋于稳定。原有微生物量 Ｃ减少程度大于原有微生物量 Ｎ。虽然加入外源基质，土壤原有 Ｃ、 Ｎ仍是微生物能源和养分的主要供给者。土壤微生物量的 Ｃ／ Ｎ 值，红壤为６７２～１１０４；变性土为４７０～７３０，加入秸秆可导致这一比值降低。
译  名：
Influence of ~(14)C and ~(15)N labelled Straw Application on Dynamics of Soil Microbial Biomass C and N
作  者：
WANG Zhiming, ZHU Peili, HUANG Dongmai (Institute of Soil and Fertilizer,Jiangsu Academy of Agricultural Sciences,Nanjing 210014)
关键词：
straw;soil microbial biomass C;soil microbial biomass N
摘  要：
After the 14 C and 15 N labelled straws being incorporated into ultisol and vertisol,the dynamics of native soil microbial biomass C,N and C/N were studied by means of closed incubation,CHCl 3 fumigation and K 2SO 4 extraction.Results indicated that straw application increased the native soil microbial biomass.Native soil biomass C and N reached their maximum values rapidly at the beginning of incubation,thereafter decreased gradually and tended to become stable.Decrease rate of native soil biomass C was faster than that of native soil biomass N.Native soil C and N still acted as the major supplier of energy and nutrients for microorganisms although the external substrates were added.C/N ratio of soil biomass ranged from 6 72 to 11 04 in ultisol and from 4 70 to 7 30 in vertisol,and it would decrease with straw application to the soil.

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