Microorganisms and nutrient stoichiometry as mediators of soil organic matter dynamics

土壤有机质 耕地 矿化(土壤科学) 营养物 农学 环境科学 有机质 碎石 化学 土壤肥力 微生物 环境化学 氮气循环 草原 土壤水分 生态学 氮气 农业 土壤科学 生物 有机化学 遗传学 细菌
作者
Elizabeth C. Coonan,Clive A. Kirkby,John A. Kirkegaard,Martin R. Amidy,Craig Strong,Alan Richardson
出处
期刊:Nutrient Cycling in Agroecosystems [Springer Science+Business Media]
卷期号:117 (3): 273-298 被引量:69
标识
DOI:10.1007/s10705-020-10076-8
摘要

Microbial detritus contributes substantially to the soil organic matter (SOM). Analysis of global literature indicated that microbial detritus carbon (C) contributed 59 and 64% of total soil C in arable agricultural and grassland systems respectively, with a 2.5% greater contribution of bacterial-derived detritus in grasslands and with no difference in the proportional contribution of fungal detritus. Total soil C and nitrogen (N) content was higher in grasslands with an average of 2.8 and 1.6 g N kg−1 soil and 28.8 and 16.8 g C kg−1 soil in grassland and arable systems, respectively. Soil N content explained 11 to 28% of the variance in microbial detritus contribution to soil C. Further, total soil N and C content explained more variance than other factors which are commonly considered to mediate SOM content including precipitation, acidity and clay. Microbial biomass C assimilation and re-metabolism of SOM are affected by nutrient supply and the dissimilarity of the C to N, phosphorus (P) and sulfur (S) ratios between fresh organic matter (FOM), SOM and microorganisms (C:N:P:S 10,000:261:32:48, 10,000:833:200:143, and 10,000:1,494:458:154, respectively). In agricultural systems, stoichiometrically balanced nutrient addition to FOM can increase C transfer to SOM by 6 to 52% and importantly reduce the mineralization of pre-existing SOM by 24 to 50%. Future research to quantify economic and environmental implications is warranted with need for a paradigm shift in thinking to focus on the nutrient requirements of the whole soil–plant system rather than the agronomic requirements of crops alone.
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
赘婿应助科研通管家采纳,获得10
刚刚
科研通AI2S应助科研通管家采纳,获得10
刚刚
ll应助科研通管家采纳,获得10
刚刚
刚刚
思源应助科研通管家采纳,获得10
刚刚
刚刚
11发布了新的文献求助10
刚刚
chx完成签到,获得积分10
1秒前
zwk发布了新的文献求助30
1秒前
略略略应助可爱绮采纳,获得20
3秒前
布丁完成签到,获得积分10
3秒前
研友_VZG7GZ应助孙成成采纳,获得10
4秒前
4秒前
Ava应助欣慰的乌冬面采纳,获得10
5秒前
风为裳完成签到,获得积分10
5秒前
5秒前
6秒前
一碗鱼完成签到,获得积分10
6秒前
ty发布了新的文献求助10
6秒前
45发布了新的文献求助10
6秒前
清爽乐菱应助可爱思山采纳,获得40
6秒前
7秒前
勤劳茗发布了新的文献求助10
8秒前
无限曲奇发布了新的文献求助10
9秒前
糜轩完成签到,获得积分10
10秒前
独特大米完成签到,获得积分20
10秒前
红色鼻涕虫完成签到,获得积分20
11秒前
阿州发布了新的文献求助10
11秒前
11秒前
12秒前
12秒前
卡卡西应助一碗鱼采纳,获得20
12秒前
12秒前
13秒前
独特大米发布了新的文献求助20
15秒前
16秒前
17秒前
17秒前
17秒前
顾矜应助勤劳茗采纳,获得10
17秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
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 3975543
求助须知:如何正确求助?哪些是违规求助? 3519971
关于积分的说明 11200248
捐赠科研通 3256311
什么是DOI,文献DOI怎么找? 1798213
邀请新用户注册赠送积分活动 877446
科研通“疑难数据库(出版商)”最低求助积分说明 806338