Root effects on soil carbon and nitrogen cycling in a Pinus radiata D. Don plantation on a coastal sand

辐射松 垃圾箱 土壤水分 硝化作用 自行车 土壤呼吸 环境科学 土壤碳 农学 氮气 氮气循环 辐射 森林地面 土壤有机质 孵化 化学 植物 土壤科学 生物 林业 有机化学 地理 生物化学 维格纳
作者
Des J. Ross,Neal A. Scott,K. R. Tate,N. J. Rodda,Jackie A. Townsend
出处
期刊:Soil Research [CSIRO Publishing]
卷期号:39 (5): 1027-1027 被引量:43
标识
DOI:10.1071/sr00058
摘要

Although the contribution of roots to soil carbon (C) fluxes and biochemical processes is recognised, it is difficult to quantify. One approach to assess their importance is the use of trenched plots, in which C inputs to the soil and respiration by living roots has ceased. We give here an account of C and nitrogen (N) pools and mineralisation in samples taken 27 months after trenching in a 26-year-old Pinus radiata D. Don plantation on a coastal sand (an Aquic Udipsamment); above-ground litter inputs continued throughout the 27-month period.Moisture contents were higher in FH material and mineral soil from the trenched than from the control plots. Trenching had no effect on total organic C and N concentrations, but led to decreases in extractable C, microbial C and N, and CO2-C production values at some depths in the soil profile. Mineral-N concentrations and gross nitrification rates were, in contrast, initially higher in the trenched-plot samples, but were similar in both treatments after incubation of the samples at 25°C for 57 days. Mineral-N concentrations were also higher in the trenched than control mineral soil after in situ incubation. On an area basis (to 20 cm depth of mineral soil), inputs from roots were estimated to account for about 40% of the extractable C pool, 28% of microbial C, 26% of microbial N, and 23% of heterotrophic CO2-C production (0–7 days at 25°C) in the control soil. Overall, our results suggest a tight connection between N cycling rates and the labile C pools derived from below-ground inputs, with nitrification in particular increasing as C availability declined as a result of trenching.
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
大个应助魏少爷采纳,获得10
1秒前
1秒前
1秒前
FashionBoy应助嘎嘎乐儿采纳,获得10
1秒前
来路遥迢完成签到 ,获得积分20
1秒前
2秒前
a9902002发布了新的文献求助10
3秒前
Li完成签到,获得积分20
4秒前
4秒前
5秒前
yif发布了新的文献求助30
5秒前
5秒前
小灵通完成签到 ,获得积分10
6秒前
Ava应助catyew采纳,获得10
6秒前
Maggie发布了新的文献求助10
6秒前
可爱的函函应助朱小燕采纳,获得10
6秒前
wuhanfei发布了新的文献求助10
6秒前
flippedaaa发布了新的文献求助10
8秒前
8秒前
zpeng完成签到,获得积分10
8秒前
爆米花应助妍妍采纳,获得10
8秒前
wanci应助kdjm688采纳,获得10
9秒前
芽芽豆完成签到 ,获得积分10
9秒前
害羞靖完成签到,获得积分10
9秒前
9秒前
9秒前
solar@2030发布了新的文献求助10
10秒前
wuhanfei完成签到,获得积分10
10秒前
12秒前
13秒前
14秒前
林子青发布了新的文献求助30
15秒前
solar@2030完成签到,获得积分10
15秒前
魏少爷发布了新的文献求助10
16秒前
充电宝应助Bismarck采纳,获得10
17秒前
情怀应助醒醒采纳,获得50
17秒前
18秒前
19秒前
20秒前
20秒前
高分求助中
Picture Books with Same-sex Parented Families: Unintentional Censorship 1000
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 310
The Moiseyev Dance Company Tours America: "Wholesome" Comfort during a Cold War 300
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 3980224
求助须知:如何正确求助?哪些是违规求助? 3524191
关于积分的说明 11220260
捐赠科研通 3261653
什么是DOI,文献DOI怎么找? 1800792
邀请新用户注册赠送积分活动 879296
科研通“疑难数据库(出版商)”最低求助积分说明 807232