清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

Enhanced root exudation stimulates soil nitrogen transformations in a subalpine coniferous forest under experimental warming

苗木 生物量(生态学) 土壤水分 农学 氮气 氮气循环 化学 生物 植物 园艺 生态学 有机化学
作者
Huajun Yin,Yufei Li,Juan Xiao,Zhenfeng Xu,Xinyin Cheng,Qing Liu
出处
期刊:Global Change Biology [Wiley]
卷期号:19 (7): 2158-2167 被引量:234
标识
DOI:10.1111/gcb.12161
摘要

Abstract Despite the perceived importance of exudation to forest ecosystem function, few studies have attempted to examine the effects of elevated temperature and nutrition availability on the rates of root exudation and associated microbial processes. In this study, we performed an experiment in which in situ exudates were collected from P icea asperata seedlings that were transplanted in disturbed soils exposed to two levels of temperature (ambient temperature and infrared heater warming) and two nitrogen levels (unfertilized and 25 g N m −2 a −1 ). Here, we show that the trees exposed to an elevated temperature increased their exudation rates I (μg C g −1 root biomass h −1 ), II (μg C cm −1 root length h −1 ) and III (μg C cm −2 root area h −1 ) in the unfertilized plots. The altered morphological and physiological traits of the roots exposed to experimental warming could be responsible for this variation in root exudation. Moreover, these increases in root‐derived C were positively correlated with the microbial release of extracellular enzymes involved in the breakdown of organic N ( R 2 = 0.790; P = 0.038), which was coupled with stimulated microbial activity and accelerated N transformations in the unfertilized soils. In contrast, the trees exposed to both experimental warming and N fertilization did not show increased exudation rates or soil enzyme activity, indicating that the stimulatory effects of experimental warming on root exudation depend on soil fertility. Collectively, our results provide preliminary evidence that an increase in the release of root exudates into the soil may be an important physiological adjustment by which the sustained growth responses of plants to experimental warming may be maintained via enhanced soil microbial activity and soil N transformation. Accordingly, the underlying mechanisms by which plant root‐microbe interactions influence soil organic matter decomposition and N cycling should be incorporated into climate‐carbon cycle models to determine reliable estimates of long‐term C storage in forests.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
今后应助dingding采纳,获得10
6秒前
Jj7完成签到,获得积分10
7秒前
23秒前
32秒前
37秒前
40秒前
彦嘉发布了新的文献求助10
44秒前
斯文败类应助ceeray23采纳,获得20
1分钟前
打打应助Dave采纳,获得10
1分钟前
1分钟前
1分钟前
ceeray23发布了新的文献求助20
1分钟前
sh1ro发布了新的文献求助10
1分钟前
nojego完成签到,获得积分10
1分钟前
脑洞疼应助科研通管家采纳,获得10
2分钟前
顾矜应助科研通管家采纳,获得10
2分钟前
wjx完成签到 ,获得积分10
2分钟前
John完成签到,获得积分10
2分钟前
顾矜应助ceeray23采纳,获得20
2分钟前
2分钟前
Able完成签到,获得积分10
2分钟前
我是笨蛋完成签到 ,获得积分10
3分钟前
ceeray23发布了新的文献求助20
3分钟前
Owen应助董可以采纳,获得10
3分钟前
酷酷妙梦完成签到,获得积分10
3分钟前
科研通AI2S应助彦嘉采纳,获得10
3分钟前
小二郎应助科研通管家采纳,获得10
4分钟前
hhh2018687完成签到,获得积分10
4分钟前
科研通AI2S应助ceeray23采纳,获得20
4分钟前
忘忧Aquarius完成签到,获得积分10
4分钟前
wujiwuhui完成签到 ,获得积分10
4分钟前
Lny发布了新的文献求助30
4分钟前
sh1ro完成签到,获得积分10
4分钟前
luang应助ceeray23采纳,获得40
4分钟前
5分钟前
ww完成签到,获得积分10
5分钟前
斯文败类应助ceeray23采纳,获得20
5分钟前
机智秋莲发布了新的文献求助20
5分钟前
ChatGPT完成签到,获得积分10
5分钟前
所所应助科研通管家采纳,获得10
6分钟前
高分求助中
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3990543
求助须知:如何正确求助?哪些是违规求助? 3532220
关于积分的说明 11256532
捐赠科研通 3271057
什么是DOI,文献DOI怎么找? 1805207
邀请新用户注册赠送积分活动 882302
科研通“疑难数据库(出版商)”最低求助积分说明 809234