气候变化领域集成服务门户(CCPortal): Increase of soil nitrogen availability and recycling with stand age of Chinese-fir plantations

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DOI	10.1016/j.foreco.2020.118643
	Increase of soil nitrogen availability and recycling with stand age of Chinese-fir plantations
	Xia Q.; Chen L.; Xiang W.; Ouyang S.; Wu H.; Lei P.; Xiao W.; Li S.; Zeng L.; Kuzyakov Y.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Soil nitrogen (N) is frequently limiting forest productivity, especially in plantations. To investigate the soil N dynamics and the consequences of N accumulation as well as the losses in the ecosystem, we studied a chronosequence of Chinese-fir (Cunninghamia lanceolata [Lamb.] Hook) plantations with stands aged 3, 16, 25, 32, and >80 years. Total N (TN), dissolved organic N (DON), microbial biomass N (MBN) and mineral N (i.e., ammonium (NH4+) and nitrate (NO3−)) in the top 0–5 cm and 5–15 cm soils were compared with the annual N accumulation by trees, annual litter N return and microbial N transformation rates. Stronger changes with stand age were observed in all N forms in the top 5 cm compared to the 5–15 cm layer. Topsoil TN and DON increased steadily in stands from ages 3- to >80-years-old by 1.9-times and 2.1-times, respectively. MBN increased from 206 mg kg−1 to 327 mg kg−1 in the first 25 years and stabilized thereafter. NH4+ content increased sharply from 3 to 16 years and then stabilized, while NO3− increased linearly with stand age. Both N demand of Chinese-fir and litter N input were clearly age dependent and defined the soil N status: rapid tree biomass accumulation in younger stands greatly depleted soil N, while the older stands with larger litter return and slower growth enabled N re-accumulation in the topsoil. The close positive correlation between total mineral N and gross mineralization rate, as well as between NO3− and gross nitrification rate indicated that the mineralization of soil organic matter and the nitrification of released NH4+ were the two primary microbial processes controlling the available N supply. The topsoil NO3−: NH4+ ratio in older stands (32- and >80 years) was greater than 1.0, and the MBN: (NH4+ + NO3−) ratio was greatly reduced. This indicates that N availability increase and N cycling is accelerated with stands age. © 2020 Elsevier B.V.
英文关键词	Cunninghamia lanceolata; Gross N mineralization; Nitrification; Soil N cycling
语种	英语
scopus关键词	Forestry; Mineralogy; Nitrification; Nitrogen; Soils; Cunninghamia lanceolata; Dissolved organic N; Forest productivity; Gross mineralization; Gross nitrification; N transformation rates; Positive correlations; Soil organic matters; Soil pollution; age determination; chronosequence; evergreen forest; forest soil; nutrient availability; recycling; soil nitrogen; stand structure; Accumulation; Age; Chinese; Forestry; Nitrification; Nitrogen; Plantations; Soil; Cunninghamia lanceolata
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154849
作者单位	Faculty of Life Science and Technology, Central South University of Forestry and Technology, Changsha, Hunan 410004, China; Huitong National Station for Scientific Observation and Research of Chinese Fir Plantation Ecosystems in Hunan Province, Huitong, Hunan 438107, China; Key Laboratory of Forest Ecology and Environment, State Forestry Administration; Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing, 100091, China; Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China; Department of Soil Science of Temperate Ecosystems, Department of Agricultural Soil Science, University of Goettingen, Göttingen, 37077, Germany; Agro-Technological Institute, RUDN University, Moscow, 117198, Russian Federation
推荐引用方式 GB/T 7714	Xia Q.,Chen L.,Xiang W.,et al. Increase of soil nitrogen availability and recycling with stand age of Chinese-fir plantations[J],2021,480.
APA	Xia Q..,Chen L..,Xiang W..,Ouyang S..,Wu H..,...&Kuzyakov Y..(2021).Increase of soil nitrogen availability and recycling with stand age of Chinese-fir plantations.Forest Ecology and Management,480.
MLA	Xia Q.,et al."Increase of soil nitrogen availability and recycling with stand age of Chinese-fir plantations".Forest Ecology and Management 480(2021).