Development of soil organic carbon pools after vineyard abandonment

IF 1.4 Q4 SOIL SCIENCE
T. Novák, J. Incze, A. McLeod, L. Giani
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引用次数: 2

Abstract

Abandoned vineyard soils show quick recharge of soil organic carbon (SOC) stocks after cancellation of cultivation. In the study abandoned vineyards with six different age classes concerning the duration of postagricultural development, organized along two lines in different exposures on slope (one S and one SW exposed chronosequence) were selected. Involving an additional recently cultivated vineyard location, totally 13 sites were sampled for topsoil characteristics. In each bulk soil sample density fractions, hot water extraction, and microbial samples were separated. Accordingly the C and N content and C/N ratio of free particulate organic matter (FPOM), occluded particulate organic matter (OPOM), clay-, silt- and sand sized microaggregates, hot water soluble organic matter, and microbial biomass of were measured and discussed in the study. We found that labile, active carbon pool (FPOM) have relatively low share of the TOC (in average 11.6% in S and 4.6% in SW sequence) and showed no increase with the time since the cancellation of cultivation. Also this pool has generally higher C/N ratio (20.6±3.7), as more stable pools (OPOM: 19.2±9.6; clay fraction: 9.2±1.2,). Highest part of TOC is stored in clay-sized microaggregates fraction (in average 37.2% in S and 41.5% SW sequence) and its amount correlates significantly with the time since the cancellation of cultivation. By comparison, in recently cultivated soil lower share of C in clay sized microaggregates and (24.0% of TOC) and higher share of labile, FPOM (26.6% of TOC) was found. C-pools in mMicrobial and hot water extractable C forms showed significant changes with the time. Based on, and exposure, and cultivation also proved differentce compared the cultivated site, anyway, their contribution to TOC are low. Abstract Abandoned vineyard soils show quick recharge of soil organic carbon (SOC) stocks after 20 cancellation of cultivation. In the study abandoned vineyards with six different age classes 21 concerning the duration of postagricultural development, organized along two lines in different 22 exposures on slope (one S and one SW exposed chronosequence) were selected. Involving an 23 additional recently cultivated vineyard location, totally 13 sites were sampled for topsoil 24 characteristics. In each bulk soil sample density fractions, hot water extraction, and microbial 25 samples were separated. Accordingly the C and N content and C/N ratio of free particulate 26 organic matter (FPOM), occluded particulate organic matter (OPOM), clay-, silt- and sand sized 27 microaggregates, hot water soluble organic matter, and microbial biomass were measured and 28 discussed in the study. We found that labile, active carbon pool (FPOM) have relatively low 29 share of the TOC (in average 11.6% in S and 4.6% in SW sequence) and showed no increase 30 with the time since comparison, in recently cultivated soil lower share of C in clay sized microaggregates and 35 (24.0% of TOC) and higher share of labile, FPOM (26.6% of TOC) was found. C-pools in 36 microbial and hot water extractable C forms showed significant changes with the time. Based 37 on exposure and cultivation also proved different, anyway, their contribution to TOC are low. 38 37 38 39 40 41 42
葡萄园废弃后土壤有机碳库的发展
废弃葡萄园土壤在取消种植后,土壤有机碳(SOC)储量迅速恢复。在研究中,根据农业后发展的持续时间,选择了六个不同年龄等级的废弃葡萄园,沿着斜坡上不同暴露的两条线(一个S和一个SW暴露时间顺序)进行组织。包括另外一个最近栽培的葡萄园地点,总共13个地点的表土特征采样。在每个体积土样密度分数中,热水萃取,微生物样品分离。据此,测定并讨论了土壤中自由颗粒有机质(FPOM)、封闭颗粒有机质(OPOM)、粘土、粉土和砂粒微团聚体、热水可溶性有机质和微生物生物量的C、N含量和C/N比值。研究发现,活性碳库(FPOM)在TOC中所占的比例相对较低(S序列平均为11.6%,SW序列平均为4.6%),并且在取消耕作后没有随时间增加而增加。该池C/N比值普遍较高(20.6±3.7),较为稳定(OPOM: 19.2±9.6;粘土分数:9.2±1.2,)。土壤中TOC含量最高的是粘土级微团聚体组分(S序列平均为37.2%,SW序列平均为41.5%),其含量与停止培养时间显著相关。相比之下,在最近开垦的土壤中,粘土微团聚体中C的比例较低(占TOC的24.0%),而活性物FPOM的比例较高(占TOC的26.6%)。微生物态和热水可提态C库随时间变化显著。基于、暴露、栽培的土壤对TOC的贡献与栽培地相比也存在差异,但均较低。摘要废弃葡萄园土壤有机碳(SOC)储量在取消种植20年后迅速恢复。在研究中,根据农业后发展的持续时间,选择了6个不同年龄等级的废弃葡萄园,沿着两条线按不同的22种暴露方式排列(一个S和一个SW暴露时间顺序)。涉及另外23个最近栽培的葡萄园地点,总共13个地点的表土特征采样。在每个体积土样密度馏分中,热水萃取,微生物25个样品分离。在此基础上,测定了土壤中自由颗粒有机质(FPOM)、封闭颗粒有机质(OPOM)、粘土、粉土和沙粒微团聚体、热水可溶性有机质和微生物生物量的C、N含量和C/N比值。研究发现,土壤中活性碳库(FPOM)占TOC的比例相对较低(S序列平均为11.6%,SW序列平均为4.6%),并且随着时间的推移没有增加,在最近开垦的土壤中,粘土微团聚体中C的比例较低,占TOC的比例为35(24.0%),而活性碳库(FPOM)占TOC的比例较高(26.6%)。36种微生物和热水可提C形态的C库随时间变化显著。暴露和栽培对TOC的贡献也不同,但总体上都较低。38 37 38 39 40 41 42
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来源期刊
Soil Science Annual
Soil Science Annual SOIL SCIENCE-
CiteScore
2.50
自引率
6.70%
发文量
0
审稿时长
29 weeks
期刊介绍: Soil Science Annual journal is a continuation of the “Roczniki Gleboznawcze” – the journal of the Polish Society of Soil Science first published in 1950. Soil Science Annual is a quarterly devoted to a broad spectrum of issues relating to the soil environment. From 2012, the journal is published in the open access system by the Sciendo (De Gruyter).
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