Effects of nitrogen addition on dissolved N2O and CO2, dissolved organic matter, and inorganic nitrogen in soil solution under a temperate old-growth forest
Effects of nitrogen addition on dissolved N2O and CO2, dissolved organic matter, and inorganic nitrogen in soil solution under a temperate old-growth forest
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氮添加对温带原始林土壤溶液中溶解N2O和CO2、溶解有机质和无机氮的影响
DOI：
10.1016/j.geoderma.2009.05.008
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发表时间：
2009-07
期刊：
影响因子：
6.1
通讯作者：
Xu, Xingkai
中科院分区：
文献类型：
--
作者：
Luo, Xianbao;Liu, Zirui;Han, Shijie;Han, Lin;Xu, Xingkai
2006年7月至2007年10月，利用多孔陶瓷吸盘对长白山红松阔叶混交林15 cm和60 cm深度土壤溶液进行了取样，研究了氮(N)添加对溶解性氧化亚氮（N2O）和二氧化碳（CO2）浓度的影响。土壤溶液中溶解的N2O和co2的实际浓度可以用连续三相平衡和气相色谱相结合的方法得到。15 cm和60 cm土壤溶液中溶解co2浓度变化范围分别为4.3 ~ 15.5和3.5 ~ 18.3 μg CO2-C ml - 1，溶解N2O浓度变化范围分别为1.8 ~ 34.9和2.5 ~ 99.3 ng N2O - n ml - 1。2007年，以每年4.5 g N/m2的速率添加（NH4）2SO4、NH4Cl和kno3等N源有降低60 cm深度土壤溶解有机碳（DOC）浓度的趋势，这与N肥林地溶解co2浓度的增加相反。然而，N的添加对15cm深度土壤溶液中溶解co2和DOC的浓度影响不明显。施氮林地土壤溶液中NH4+ -N、NO3−-N和溶解有机氮（DON）浓度均有增加。春季解冻后的降雨可以促进15 cm和60 cm深度土壤溶液中溶解N2O的积累，特别是在添加（NH4） 2so4地块下的60 cm深度，这是由于DON的矿化和硝化作用。15 cm和60 cm深度土壤溶液的所有测试性质都具有良好的相关性。其中，60 cm深度土壤溶液溶解N2O浓度与DON浓度的相关性较好，15 cm深度土壤溶液溶解co2浓度与DOC浓度的相关性较好。因此，氮肥林地不同深度土壤溶液中溶解的co2和N2O的形成，DOC和DON都有促进作用。我们的观察结果有力地表明，对温带森林地面的氮输入会影响下伏森林土壤中氮和碳过程的状态。
Soil solutions at 15 cm and 60 cm depths under a Korean pine and broadleaf mixed forest (>200 years old) at Changbai mountain, northeast China, were sampled using porous ceramic suction cups from July 2006 to October 2007, to study the effects of nitrogen (N) addition on the concentrations of dissolved nitrous oxide (N2O) and carbon dioxide (CO2), dissolved organic matter and inorganic N. The actual concentrations of dissolved N2O and CO2in soil solutions could be obtained using a combination of continual three phase equilibrations and gas chromatography. The dissolved CO2concentrations in soil solutions at 15 cm and 60 cm depths varied from 4.3 to 15.5 and from 3.5 to 18.3 μg CO2–C ml−1, respectively, and dissolved N2O concentrations at both depths varied from 1.8 to 34.9 and from 2.5 to 99.3 ng N2O–N ml−1, respectively. The addition of N sources such as (NH4)2SO4, NH4Cl and KNO3at a rate of 4.5 g N/m2each year tended to decrease concentrations of dissolved organic carbon (DOC) in soil solutions at 60 cm depth in 2007, which was contrary to the increase in dissolved CO2concentrations under N-fertilized forest plots. However, the N addition did not give an obvious effect on the concentrations of dissolved CO2and DOC in soil solutions at 15 cm depth. There was an increase in concentrations of NH4+–N, NO3−–N and dissolved organic nitrogen (DON) of soil solutions under N-fertilized forest plots. Rainfall after thawing in spring could promote the accumulation of dissolved N2O in soil solutions at 15 cm and 60 cm depths, particularly at 60 cm depth under the (NH4)2SO4added plots, due to mineralization of DON and nitrification. All the tested properties of soil solutions at 15 cm and 60 cm depths were well correlated. Among these properties, the dissolved N2O concentrations of soil solutions at both depths were better correlated with the DON concentrations at 60 cm depth, and the dissolved CO2concentrations at 15 cm depth with the DOC concentrations at both depths. Hence, both DOC and DON can contribute to the formation of dissolved CO2and N2O in the soil solutions at varying depths under N-fertilized forest plots, respectively. Our observations strongly indicate that N inputs to temperate forest floors can affect the status of N and carbon processes in underlying forest soils.
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影响因子：
6.1
作者：
K. Michel;E. Matzner;M. Dignac;I. Kögel‐Knabner
通讯作者：
K. Michel;E. Matzner;M. Dignac;I. Kögel‐Knabner
影响因子：
1.8
作者：
Jeroen Vandenbruwane;S. De Neve;A. de Schrijver;G. Geudens;K. Verheyen;G. Hofman
通讯作者：
Jeroen Vandenbruwane;S. De Neve;A. de Schrijver;G. Geudens;K. Verheyen;G. Hofman
影响因子：
2
作者：
Xingkai Xu;Lin Han;Yuesi Wang;K. Inubushi
通讯作者：
Xingkai Xu;Lin Han;Yuesi Wang;K. Inubushi
低浓度乙炔对森林土壤硝化、矿化和微生物量氮浓度的影响
DOI：
10.1007/s11434-008-0470-7
发表时间：
2009
期刊：
科学通报(英文版)
影响因子：
--
作者：
Luo XianBao;Zhang TengYu;Xu XingKai;Wang YingHong;Han Lin;Pan GenXing
通讯作者：
Pan GenXing
影响因子：
9.7
作者：
Holtan-Hartwig, L;Dörsch, P;Bakken, LR
通讯作者：
Bakken, LR