名山河流域不同土壤类型和土地利用方式下有机碳的分布特征

以名山河流域不同类型土壤为研究对象,研究了不同土地利用方式下土壤有机碳和团聚体中有机碳含量的分布特征。结果表明:(1)名山河流域3种类型的土壤有机碳含量在17.50~34.70g/kg之间,含量高低表现为水稻土黄壤紫色土,水稻土含量分别是黄壤和紫色土的1.32,1.39倍;从不同的土地利用方式看,水田土壤有机碳及活性有机碳含量显著高于旱地、茶园和果园,土壤活性有机碳与土壤有机碳呈极显著正相关(R2=0.884 6);(2)土壤有机碳含量在土壤剖面中表现出随着土层深度的增加而降低的趋势,表层土壤(0—20cm)有机碳含量由高到低依次为水稻土黄壤紫色土,下层土壤(20—40cm)有机碳含量为水稻土紫色土黄壤,土壤活性有机碳含量的分布具有相似规律;(3)在不同土地利用方式下,表层土壤(0—20cm)有机碳含量大小关系表现为水田旱地果园茶园,下层土壤(20—40cm)有机碳含量表现为水田果园茶园旱地,水田表层、下层土壤活性有机碳含量均极显著地高于旱地、果园、茶园,再次证明活性有机碳是表征有机碳特性的重要指标;(4)3种类型土壤的团聚体在不同的利用方式下的有机碳含量表现出随着土壤剖面加深而降低的趋势,土壤团聚体的单位有机碳含量随着粒径的减小呈现波浪形的变化趋势,各粒径团聚体中的有机碳含量与土壤有机碳含量呈正相关关系。综上可知,土壤类型的差异和土地利用方式的不同会对土壤有机碳及各粒径团聚体中有机碳的含量及分布特征产生一定的影响。     

重庆市土壤有机碳库的估算及其空间分布特征

基于重庆市第二次土壤普查的1411个土壤剖面数据,结合重庆市土壤图、土地利用现状图和行政区划图,在地理信息系统技术的支持下,对重庆市土壤有机碳密度及储量进行了估算、同时引入有机碳丰度指数这一指标,对有机碳在不同土壤、不同区域以及不同景观中的分布特征进行了分析。结果表明：重庆市20cm和100cm深度的土壤有机碳储量分别为0．27Tg和1．0Tg;20cm深度的土壤有机碳密度介于0．33～30．36kg／m^2之间．100cm深度的土壤有机碳密度介于1．27～72．69kg／m^2之间;重庆市土壤有机碳库在不同土壤、不同区域以及不同景观的分布具有高度的空间变异性,100cm深度的土壤、区域和景观有机碳丰度指数分别为0．58～1．95,0．55～1．39和0．46～1．58．与气候、植被、人类活动等因素密切相关。     

三江平原土壤有机碳含量及其密度的空间变异特征分析

  目的  三江平原是我国重要的粮食产地,探究三江平原土壤有机碳(SOC)含量及其密度的空间分布特征及影响因素,为该区域土壤有机碳库的维持和提升提供重要依据。  方法  在三江平原地区8 km × 8 km网格法布设采样点,共采集表层（0 ~ 20 cm）土壤样品324份,开展土壤有机碳含量及其密度空间分布特征和影响因素分析。  结果  表层土壤有机碳含量平均值为30.90 ± 25.42 g kg?1、表层有机碳密度平均值为69.05 ± 48.62 t hm?2,其空间上呈“东南低－西北高”分布特征。黑土与水稻土之间土壤有机碳含量存在极显著差异（P < 0.01),与暗棕壤之间土壤有机碳含量存在显著性差异(P < 0.05);耕地－水田土壤有机碳含量最低,为27.21 g kg?1,林草地有机碳含量最高,为44.83 g kg?1,耕地与林草地之间土壤有机碳含量存在极显著差异（P < 0.01);种植水稻的土壤有机碳含量最低,为27.31 g kg?1,种植混合林的土壤有机碳含量最高为44.83 g kg?1,种植混合林与种植玉米、水稻、豆类之间的土壤有机碳含量存在极显著差异（P < 0.01)。  结论  总体看来,土地利用类型、土壤类型和作物类型三种因素对三江平原地区土壤有机碳含量及其密度均有影响,并达到显著水平。     

克里格插值在区域土壤有机碳空间预测中的应用

基于河北省第二次全国土壤普查数据,对比了常用土壤有机碳相关因子土地利用和土壤类型与普通克里格插值结合前后对土壤有机碳密度空间预测精度的差异,探讨了普通克里格插值在区域土壤有机碳空间预测中的应用。研究结果表明,土地利用能够独立解释土壤有机碳密度总方差的19.0%,与普通克里格插值结合以后能够将对土壤有机碳密度总方差的解释程度显著提高到30.2%。低级土壤分类土属能够独立解释土壤有机碳密度总方差的45.0%,但与普通克里格插值结合以后对土壤有机碳密度总方差的解释程度为44.8%,两者相差不大。因此区域空间上能否进一步应用普通克里格插值优化土壤有机碳的空间预测与所选用的土壤有机碳相关因子有关。     

南方侵蚀治理区土壤碳分布及主控因素研究

研究侵蚀治理区土壤碳区域分布影响因素对揭示退化土壤有机碳恢复有重要的意义。本文以江西省兴国县侵蚀治理恢复区林地土壤有机碳为研究对象,评价了土壤类型和成土母质对土壤有机碳的影响及其主控作用。结果表明：兴国县侵蚀治理恢复区林地土壤有机碳受土壤类型和成土母质影响显著,其中黄红壤各土层土壤有机碳含量均显著高于红壤;千枚岩发育的土壤有机碳显著高于红砂岩和花岗岩。对比土壤类型和成土母质对土壤有机碳的影响作用大小发现,在表层0 ~ 20 cm土壤类型对土壤有机碳变异解释能力大于30%,成土母质的解释能力约为17%,土壤类型是影响表层土壤有机碳的主控因素;表下层20 ~ 30 cm 土壤有机碳变异的解释能力则表现为成土母质(28.8%)与土壤类型(27.5%)基本相当,同为主控因素。因此,兴国县侵蚀治理恢复区土壤类型和成土母质对土壤有机碳的影响作用不容忽视,合理地分区展开水土保持工作有利于退化土壤的碳恢复。     

云南省土壤有机碳储量估算及空间分布

根据云南省第二次土壤普查资料,采用土壤类型法估算了云南省主要土壤类型的有机碳(SOC)密度和储量,并对云南省土壤有机碳密度的空间分布差异和影响土壤有机碳储量的主要因子进行了分析。结果表明,云南省0-20 cm土层平均SOC密度为59.77 t/hm²,SOC储量为2.30×10⁹ t;0-100 cm土层平均SOC密度为159.95 t/hm²,SOC储量为6.15×10⁹ t,占全国储量的7.28%,占全球陆地生态系统SOC储量的0.41%;其中SOC储量占前4位的土壤类型为红壤、黄棕壤、赤红壤、棕壤,不同深度下4者之和约占云南省总储量的60%。在土壤有机碳密度空间分布上,SOC密度分布最高的区域为云南省西北部和东北部地区,其次是西部的横断山脉和东部的云南高原地区,而以紫色土为主的中北部地区SOC密度则最低。由于降雨量、温度、海拔和土地利用类型的共同影响,导致了区域内的SOC密度分布不均,其中降雨量、温度和海拔等自然因素是影响SOC密度分布的主要因子。     

不同土地利用方式对土壤有机无机碳比例的影响

【目的】 土壤有机碳 (SOC) 和无机碳 (SIC) 对全球碳循环和减缓气候变化具有重要作用,进一步明确二者之间相互转化关系,对准确估算土壤碳储量具有重要意义。现有研究对SOC和SIC相互关系缺乏系统量化,研究结果不一。因此,明确SOC和SIC之间相互关系,可为准确估算和模拟土壤碳的转化过程提供理论基础。 【方法】 本研究搜集了我国1990—2018年已发表的文献共41篇,从不同气候区、不同土地利用方式、不同土层深度探究了SOC和SIC比例的变化,进一步量化了二者之间的相互关系。 【结果】 不同气候区、不同土地利用方式下土壤SOC/SIC值在0—20 cm土层均大于20—100 cm土层。具体来说,在温带大陆性气候区,草地0—20 cm土壤SOC/SIC值最小 (0.53),林地 (0.90) 和农田 (0.80) 土壤较高,且三种土地利用方式下SOC和SIC呈极显著正相关关系;而在温带季风性气候区,0—20 cm土壤SOC/SIC值表现为草地 (0.82) ≈ 农田 (1.05) > 林地 (0.29),且SOC和SIC在林地、农田土壤中呈正相关关系,但在草地土壤中二者为负相关关系。另外,温带大陆性气候区20—100 cm以林地土壤SOC/SIC值最高,草地和农田次之,而在温带季风性气候区三种土地利用方式下无显著差异;SOC和SIC在林地和农田土壤中呈正相关关系,然而在草地土壤中为负相关关系。温带大陆性气候区SOC/SIC值总体以林地较大,农田、草地次之。温带季风性气候区,0—20 cm土层SOC/SIC值以草地较大,农田和林地分别次之。这可能是因为植被覆盖不同,导致了作物碳的归还量不一。同时,不同的植被覆盖还影响了土壤中的各种生物化学进程,改变了碳在土壤中的循环转化过程,进而影响了SOC和SIC含量,使得SOC/SIC值产生较大差异。 【结论】 SOC和SIC之间存在循环转化关系,且不同气候条件、不同土地利用方式、不同土壤类型对SOC和SIC循环转化存在显著影响。不同条件下SOC/SIC值存在显著差异,且二者呈现不同的相关性。本研究结果可为明确土壤碳的循环积累机制,准确估算土壤有机和无机碳库提供理论依据。      

岷江上游山地森林－干旱河谷交错带不同土地 利用类型土壤有机碳储量

生态交错带是全球气候变化的最敏感区域,因而对生态交错带不同土地利用类型土壤有机碳的研究,可为生态交错带土地利用和有效管理提供基础数据。岷江上游山地森林－干旱河谷交错带6种土地利用类型的土壤有机碳含量和有机碳储量均随土壤深度的增加而降低;土壤有机碳储量的大小顺序为天然川滇高山栎次生林（104.15±4.84t/hm²）>灌木林地（100.84±2.43t/hm²）>灌丛地（97.35±15.21t/hm²）>经济林（85.16±10.58t/hm²）>人工刺槐林（70.78±12.43t/hm²）>农耕地（56.56±7.21t/hm²）;农耕地转变为人工刺槐林和经济林后,其土壤有机碳储量分别增加了25.13%和50.56%;人为干扰以及交错带生态系统的脆弱性及其叠加效应是导致岷江上游山地森林－干旱河谷交错带不同土地利用类型土壤有机碳储量偏低的重要原因。     

拱坝河流域5种森林类型土壤有机碳的分布特征

[目的]研究拱坝河流域典型森林土壤有机碳含量和有机碳密度的分布特征,为深入推进森林多目标经营工作提供科学依据。[方法]通过实地调查取样和室内实验测定。[结果](1)人工云杉林SOC含量平均为(32.5±21.82)g/kg,0—60cm SOCD为(13.85±6.98)kg/m2;(2)不同土壤深度,土壤密度差异显著;随土壤深度增加,5种森林类型的土壤有机质,全N,全P,全K,有效P及速效K含量呈递减趋势。(3)0—60cm土层含量与自然含水量,全N,全K,速效K均呈极显著或显著正相关,与土壤密度呈极显著负相关;SOCD与土壤理化性质表现出一致的相关性。[结论]研究区不同森林类型土壌有机碳含量和有机碳密度受多种因素的影响,在林分结构、土壤理化特性、树种特性等多种因素的共同影响下,土壤有机碳和有机碳密度表现出明显的差异性。     

陕西省土壤有机碳密度空间分布及储量估算

土壤有机碳是反映土壤质量以及土壤缓冲能力的一个重要指标,对于温室效应与全球气候变化具有重要的控制作用。研究以陕西省第二次土壤普查数据为主要资料,结合多年的相关研究数据,对陕西省土壤碳密度及储量进行估算,并分析了陕西省土壤有机碳密度的空间分布特征。结果表明:榆林、延安地区北部以及商洛等地区分布的风沙土、黄绵土、石质土等土壤有机碳密度最小,小于4 kg m-2;陕西南部地区的土壤有机碳密度主要在4~9 kg m-2之间;咸阳地区及渭南地区土壤有机碳密度也较高,主要在9~12 kg m-2之间;关中地区渭河及其两岸、秦岭部分山区土壤有机碳密度最大,最高达30 kg m-2以上;陕西省平均土壤有机碳密度为6.87 kg m-2,在全省的22个土壤类型中,有13个土壤有机碳密度低于全国平均水平,占全省土壤总面积的77.42%,全省土壤有机碳储量约为1.41×1012kg。本研究为我国土壤碳库和碳平衡的研究提供基础数据。     

土地利用方式对球囊霉素土层分布的影响

球囊霉素对维持土壤有机碳平衡和土壤团聚体稳定性具有明显作用,但不同土地利用方式下土壤球囊霉素的土层分布模式及其影响因素尚不清楚.本研究选取农田、人工草地、果园和撂荒地4种不同土地利用方式,分别采集0～10 cm、10～20 cm、20～30 cm和30～40 cm 4个土层土样,通过测定土壤球囊霉素.pH、速效磷、有机碳和蛋白酶活性,研究不同土地利用方式下土壤球囊霉素土层分布的模式及影响因素.结果表明,土壤球囊霉素平均含量为1.41～3.18 mg·g-1,占土壤有机碳的6.98%～31.34%,是土壤中的一个重要碳库.土壤球囊霉素在不同土地利用方式和土层剖面之间表现出显著差异(P<0.01),具有明显的垂直分布特征,除撂荒地外,其随土层深度的增加表现出降低趋势.土壤球囊霉素分别与土壤速效磷、蛋白酶呈显著正相关(P<0.01).土壤速效磷在很大程度上决定土壤球囊霉素的含量和分布.土壤球囊霉素含量和土壤蛋白酶活性之间为间接相关关系,该关系有待于进一步研究.建议把球囊霉素作为研究丛枝菌根真菌生长状况和土壤生态系统波动的一个重要指标.     

Vertical distribution of soil nematodes under different land use types in an aquic brown soil

A field investigation was conducted at the Shenyang Experimental Station of Ecology to study the vertical distribution of nematode communities down to a depth of 150 cm under four land use types (paddy field, maize field, fallow field and woodland) in an aquic brown soil of Northeast China. The results showed that the numbers of total nematodes and trophic groups exhibited a gradual decrease trend with depth under different land use types. The numbers of total nematodes, bacterivores, fungivores, and plant parasites were positively correlated with the contents of TOC, total N, and alkali N in the four land use types. The majority of nematodes were present in the 0–30 cm soil layers. No significant effects were found on the number of total nematodes at all depths among the maize field, fallow field and woodland. Bacterivores were found to be the most abundant group in the paddy field, while plant parasites were observed to be the most abundant group in the maize field, fallow field and woodland. The number of fungivores at the depths of 0–5 and 5–10 cm was higher in the maize field than in the other land use types. Omnivores-predators were found in relatively low numbers under each land use type, with a higher presence in the fallow field and woodland at the depths of 0–5, 5–10, 10–20 cm compared with the paddy and maize fields. 54 genera were observed throughout the four land use types in our study. The woodland treatment supporting greater basal resource inputs tended to result in a higher diversity of nematodes. The number of genera reached a maximum at the depth of 5–10 cm under each land use type. The faunal profiles showed that soil food webs in the fallow field and woodland were structured, and those in the paddy and maize fields were stressed. The faunal analysis provided a useful tool for diagnostic interpretation of the condition of upper soil layers.     

Soil chemical properties of an Indonesian red acid soil as affected by land use and crop management

In the middle terrace area of south Sumatra, Indonesia, where red acid soils poor in crop productivity are widely distributed, the effects of cropping pattern and cultivation techniques on physico-chemical properties of soil were investigated. Five patterns for cassava cropping, including monoculture, a rotation with annual food crops, and three intercroppings with differences in the combination with annual crops and in the planting density, were evaluated in Experiment I. In Experiment II, eight plots composed of the combinations of two tillage methods (no-tillage or conventional tillage), the presence or absence of surface mulch from crop residues, and two rates of chemical fertilizers were established for a maize–soybean–cowpea sequential cropping pattern. At the end of 3 years, there was no difference in total C and total N concentrations among the plots in Experiment I irrespective of the mulch treatment using crop residues. Soil organic matter (SOM) concentration was not affected even in the no-tillage plot where the maximum crop residues (20 t ha⁻¹) was given as surface mulch with the increased root residues due to higher rates of fertilizers (Experiment II). In Experiment I, available P concentration was highest in an intercropping with higher fertilizer rates and lowest cassava planting density. In Experiment II, an increase in available P was attained by mulching and the higher rate of fertilizers, and a minor positive effect of fertilizer was also observed in exchangeable Mg and K concentrations. Surface mulch resulted in less clay fraction compared with the non-mulch plots in both the experiments, suggesting its effect on the maintenance of soil particle distribution. An additional finding suggested no prominent influence of cassava monoculture on the level of SOM in this area based on the comparison with other major land uses, including secondary forest, rubber plantation, and mixed cultivation of fruits with crops. Nevertheless, the introduction of crop residue mulch and higher rates of fertilizers are recommended for sustaining soil quality and achieving higher crop yields.     

有机管理对不同土地利用方式下土壤质量的影响

许多研究发现有机管理可以改善农田土壤质量,但是否不同土地利用方式下都存在此结论尚未明确。为探究有机管理对不同土地利用方式土壤质量的影响,本研究基于一个多土地利用方式的有机管理农场及其附近常规管理农田进行土壤质量调查,对比不同管理措施及大棚菜地、果园、露天菜地、农田边界、稻田田埂5种土地利用方式下农田土壤质量的差异,并对不同管理措施下农田土壤养分含量、重金属含量、动物数量共计20个指标进行方差分析和主成分分析。研究发现虽然总体上(综合5种土地利用方式的均值)有机管理的土壤pH显著高于常规农田;但针对一种土地利用方式,只有露天菜地和农田边界的土壤pH显著提高。总体上有机管理下土壤全磷、全钾、有效磷含量显著降低,但露天菜地土壤有机质和全氮含量均显著高于常规管理农田。有机管理在总体上显著降低了土壤Cr、Cu、Ni、Zn含量;但针对一种土地利用方式,只显著降低了大棚菜地土壤Cr、Ni、Zn含量,果园和稻田田埂土壤Cu含量,露天菜地和农田边界土壤Zn含量。有机管理虽然总体上均显著增加了土壤中蜘蛛目、倍足纲、步甲、蚯蚓的数量;但针对一种土地利用方式,只显著增加了露天菜地地表蜘蛛目、倍足纲、步甲,稻田田埂地表步甲、土壤蚯蚓以及果园倍足纲数量。主成分分析结果表明,不同管理方式下土壤质量差异明显,有机管理下蜘蛛目、倍足纲、步甲和蚯蚓等土壤动物较多,土壤pH较高,土壤P含量较低,重金属Cu、Pb、Zn、Cr含量较低,但并非在所有土地利用方式下都成立。由此可见,有机管理虽然总体上可以改善土壤质量,但受具体管理措施、人为投入品数量和有机种植时间等因素影响,并非在所有土地利用方式下效果都显著,且在不同土地利用方式下显著改善的指标也各不相同,因此需要针对不同土地利用方式和不同指标采取针对性的改善措施。     

Soil organic carbon distribution in relation to land use and its storage in a small watershed of the Loess Plateau, China

Soil organic carbon (SOC) is an important component in agricultural soil, and its stock is a major part of global carbon stocks. Estimating the SOC distribution and storage is important for improving soil quality and SOC sequestration. This study evaluated the SOC distribution different land uses and estimated the SOC storage by classifying the study area by land use in a small watershed on the Loess Plateau. The results showed that the SOC content and density were affected by land use. The SOC content for shrubland and natural grassland was significantly higher than for other land uses, and cropland had the lowest SOC content. The effect of land use on the SOC content was more significant in the 0-10 cm soil layer than in other soil layers. For every type of land use, the SOC content decreased with soil depth. The highest SOC density (0-60 cm) in the study area was found in shrublandII (Hippophae rhamnoides), and the other land uses decreased in the SOC density as follows: natural grassland > shrublandI (Caragana korshinskii) > abandoned cropland > orchard > level ground cropland > terrace cropland > artificial grassland. Shrubland and natural grassland were the most efficient types for SOC sequestration, followed by abandoned cropland. The SOC stock (0-60 cm) in this study was 23,584.77 t with a mean SOC density of 4.64 (0-60 cm).     

Soil respiration and carbon balance of gray forest soils as affected by land use

 Soil respiration was measured by closed chamber and gradient methods in soils under forest, sown meadow and crops. Annual total soil respiration determined with the closed chamber method ranged from 180 to 642 g CO₂-C m^–2 year^–1 and from 145 to 382 g CO₂-C m^–2 year^–1 determined with the CO₂ profile method. Soil respiration increased in the order: cropland<sown meadow<forest. The C balance calculated as the difference between net primary production (sink) and respiration of heterotrophs (source) suggested an equilibrium between the input and output of C in the cropland, and sequestration of 135 and 387 g CO₂-C m^–2 year^–1 in the forest and meadow, respectively. Received: 1 December 1997     

大同市南郊区土地利用生态服务价值空间分布及变化

本研究以中国生态服务价值当量因子表为基础计算了大同市南郊区不同土地利用生态服务价值单价,结合该区1987年和2002年Landsat TM/ETM 影像分类数据,借助Fragstats和ENVI软件支持进行了矩形单元土地利用生态服务价值的空间模拟,然后采用ENVI的波段运算功能、分类功能进行大同市南郊区土地利用生态服务价值空间分布及变化研究。结果显示:大同市南郊区1987年和2002年土地利用正生态服务区面积大于负生态服务区面积,但生态服务质量等级都不高。1987年平原区生态服务质量好于山丘区,2002年山丘区生态服务质量好于平原区。大同市南郊区从1987年至2002年土地利用生态服务增加区面积大于减小区,且以轻度增加为主。平原区生态服务增加区面积小于山丘区,生态服务减小区面积大于山丘区。平原区生态服务增加区面积小于减小区面积;山丘区生态服务增加区面积大于减小区面积。     

Size spectra of soil nematode assemblages under different land use types

Although the slopes of size spectra (plots of abundance on organism size) have been widely used to assess aquatic and terrestrial communities, size spectra have not been used to assess soil nematode communities. Two forms of size spectra (one based on the average biomass of nematode genera and another based on the average biomass of nematode size classes were used to assess the soil nematode communities in managed forage land and cropland, and in naturally developed grass-shrubland and secondary forests in a karst peak-cluster depression area. R² values were larger for size spectra based on nematode size classes than on genera. The slopes of the size spectra for total nematodes were more negative in forage land and cropland than in grass-shrubland and secondary forests, which was consistent with disturbance of the soil nematode community by agricultural management. The results suggest that size spectra analysis is applicable to soil nematodes; they can reveal different land use types and may reveal the degree to which the soil nematodes in particular and the soil community in general have been disturbed. Size spectra may be more useful if based on nematode size classes rather than on genera.     

黄河三角洲盐碱地不同利用方式土壤理化性质

为了缓解土壤盐碱性,保证土壤可持续利用,研究了黄河三角洲典型土地利用类型撂荒地、棉田、苜蓿地和梨园土壤理化性质.结果表明:棉田土壤容重较高,而孔隙度和毛管孔隙度低,由于棉田灌水压盐措施,抬高了地下水位,土壤返盐严重.苜蓿地由于管理粗放,对土壤扰动少,容重较低,孔隙度和毛管孔隙度较高,盐碱度较低;每年对苜蓿的采收显著降低了苜蓿地土壤有机质和养分含量,而豆科固氮菌的存在,使表层速效氮含量较高.梨园位于黄河三角洲土壤质地较好的区域,且有机肥料施用一定程度上缓解了土壤板结,盐碱度较低.撂荒地表层土壤理化指标均显著优于棉田,在退化土壤恢复中具有较好的效果.     

Assessing scale effects on modelled soil organic carbon contents as a result of land use change in Belgium

This paper explores the influence of spatial scale on modelled projections of soil organic carbon (SOC) content. The effect of land use change (LUC) on future SOC stocks was estimated using the Rothamsted Carbon model for a small area of southern Belgium. The study assumed no management change and used a single climate change scenario. Three model experiments were used to identify how data scale affects predicted SOC stocks: (i) using European LUC datasets at a resolution of 10′ and assuming equal distribution of change within the study area, (ii) using more accurate regional data aggregated to the 10’ resolution, and (iii) using the regional data at a spatial resolution of 250 m. The results show that using coarse resolution (10′) data is inappropriate when modelling SOC changes in the study area as only the methods using precise data predict a change in SOC stocks similar to those reported in the literature. This is largely because of differences in model parameterisation. However, precisely locating LUC does not significantly affect the results. The model, using either pan‐European or region‐specific precise data predicts an average SOC increase of 1 t C ha^?1 (1990–2050), mainly resulting from afforestation of 13% of agricultural land.