Impact of understory vegetation on soil carbon and nitrogen dynamic in aerially seeded Pinus massoniana plantations

被引:28
作者
Pan, Ping [1 ]
Zhao, Fang [2 ]
Ning, Jinkui [1 ]
Zhang, Ling [1 ]
Ouyang, Xunzhi [1 ]
Zang, Hao [1 ]
机构
[1] Jiangxi Agr Univ, Coll Forestry, Nanchang, Jiangxi, Peoples R China
[2] Jiujiang Univ, Coll Tourism & Terr Resources, Jiujiang, Peoples R China
来源
PLOS ONE | 2018年 / 13卷 / 01期
基金
中国国家自然科学基金;
关键词
LITTER DECOMPOSITION; MICROBIAL BIOMASS; ORGANIC-CARBON; N MINERALIZATION; FOREST; CHINA; CO2; GRASSLAND; ECOSYSTEM; REMOVAL;
D O I
10.1371/journal.pone.0191952
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Understory vegetation plays a vital role in regulating soil carbon (C) and nitrogen (N) characteristics due to differences in plant functional traits. Different understory vegetation types have been reported following aerial seeding. While aerial seeding is common in areas with serious soil erosion, few studies have been conducted to investigate changes in soil C and N cycling as affected by understory vegetation in aerially seeded plantations. Here, we studied soil C and N characteristics under two naturally formed understory vegetation types (Dicranopteris and graminoid) in aerially seeded Pinus massoniana Lamb plantations. Across the two studied understory vegetation types, soil organic C was significantly correlated with all measured soil N variables, including total N, available N, microbial biomass N and water-soluble organic N, while microbial biomass C was correlated with all measured variables except soil organic C. Dicranopteris and graminoid differed in their effects on soil C and N process. Except water-soluble organic C, all the other C and N variables were higher in soils with graminoids. The higher levels of soil organic C, microbial biomass C, total N, available N, microbial biomass N and water-soluble organic N were consistent with the higher litter and root quality (C/N) of graminoid vegetation compared to Dicranopteris. Changes in soil C and N cycles might be impacted by understory vegetation types via differences in litter or root quality.
引用
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页数:13
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