Estimating active carbon for soil quality assessment: A simplified method for laboratory and field use

土壤质量 领域(数学) 质量(理念) 土壤碳 环境科学 土壤水分 土壤科学 数学 哲学 认识论 纯数学
作者
Ray R. Weil,K. R. Islam,Melissa A. Stine,Joel Gruver,S. Samson‐Liebig
出处
期刊:American journal of alternative agriculture [Cambridge University Press]
卷期号:18 (1): 3-17 被引量:653
标识
DOI:10.1079/ajaa200228
摘要

Abstract A simple method of estimating changes in biologically active soil carbon (C) could help evaluate soil quality impacts of alternative management practices. Most reports of permanganate for active C determination use highly concentrated solutions (0.333 M) that are difficult to work with and tend to react with a large fraction of soil C that is not well distinguished from total organic C. We report on a highly simplified method in which dilute, slightly alkaline KMnO 4 reacts with the most readily oxidizable (active) forms of soil C, converting Mn(VII) to Mn(II), and proportionally lowering absorbance of 550 nm light. The amount of soil C that reacted increased with concentration of KMnO4 used (0.01 to 0.1 M), degree of soil drying (moist fresh soil to air-dried for 24 hour) and time of shaking (1–15 minutes). Shaking of air-diy soil in a 0.02 M KMnO 4 solution for 2 minutes produced consistent and management-sensitive results, both in the laboratory and with a field kit that used a hand-held colorimeter. Addition of 0.1 M. CaCl 2 to the permanganate reagent enhanced settling of the soil after shaking, eliminating the need for centrifugaron in the field kit. Results from the laboratory and field-kit protocols were nearly identical (R 2 = 0.98), as were those from an inter-laboratory sample exchange (R 2 = 0.91). The active soil C measured by the new procedure was more sensitive to management effects than total organic C, and more closely related to biologically mediated soil properties, such as respiration, microbial biomass and aggregation, than several other measures of soil organic C.
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
多走一步完成签到,获得积分10
1秒前
w_完成签到,获得积分10
2秒前
爱听歌依波完成签到 ,获得积分10
2秒前
Leon发布了新的文献求助10
2秒前
gsgg完成签到 ,获得积分20
3秒前
笨笨友桃完成签到,获得积分10
3秒前
在水一方应助Huang采纳,获得10
3秒前
4秒前
5秒前
郭郭要努力ya完成签到 ,获得积分10
6秒前
7秒前
科研通AI2S应助Saint采纳,获得10
7秒前
annafan完成签到,获得积分10
7秒前
8秒前
科目三应助雷桑采纳,获得10
8秒前
少吃顿饭并不难完成签到 ,获得积分10
9秒前
珠珠发布了新的文献求助10
9秒前
9秒前
刘三哥完成签到 ,获得积分10
10秒前
隐形曼青应助leederay采纳,获得10
11秒前
上官若男应助to_ooooo采纳,获得10
11秒前
海阔天空发布了新的文献求助10
12秒前
顺心羊完成签到,获得积分10
12秒前
科研_小白完成签到,获得积分10
12秒前
XJTU_jyh完成签到,获得积分10
13秒前
TheaGao完成签到 ,获得积分10
13秒前
不是省油的灯完成签到 ,获得积分10
15秒前
17秒前
17秒前
bububu完成签到,获得积分10
18秒前
nanaki完成签到,获得积分10
18秒前
19秒前
小蘑菇应助lin采纳,获得10
20秒前
20秒前
21秒前
czcz发布了新的文献求助10
21秒前
Sean完成签到 ,获得积分10
24秒前
雷桑发布了新的文献求助10
24秒前
窗户上的喵咪很无聊完成签到 ,获得积分10
25秒前
Saint完成签到,获得积分10
26秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
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 4038619
求助须知:如何正确求助?哪些是违规求助? 3576294
关于积分的说明 11375058
捐赠科研通 3306084
什么是DOI,文献DOI怎么找? 1819374
邀请新用户注册赠送积分活动 892698
科研通“疑难数据库(出版商)”最低求助积分说明 815066