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首页> 外文期刊>Geoderma: An International Journal of Soil Science >Distribution and cultivation intensity of agricultural peat and gyttja soils in Sweden and estimation of greenhouse gas emissions from cultivated peat soils
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Distribution and cultivation intensity of agricultural peat and gyttja soils in Sweden and estimation of greenhouse gas emissions from cultivated peat soils

机译：瑞典农业泥炭和gyttja土壤的分布和耕种强度以及耕作泥炭土壤温室气体排放的估算

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摘要

Digitised maps of Quaternary deposits, super(40)K radiation data and Integrated Agricultural Control System databases (IACS) were used in a GIS analysis to estimate the distribution and land use of agricultural peat and gyttja soils in Sweden. The total area of agricultural land (cropland and pastures) in Sweden was estimated at 3,496,665 ha and 8.6% of this area (301,489 ha) was classified as agricultural peat and gyttja soils, with 202,383 ha of deep peat, 50,191 ha of shallow peat and 48,915 ha of gyttja soils. Using detailed information on crop distribution from agricultural databases, it was possible to estimate the cultivation intensity (land use) of the agricultural land. One-quarter of the agricultural area of peat soils was intensively cultivated with annual crops and the remaining area was extensively used, dominated by managed grasslands and pastures. There was great variation in cultivation intensity between areas, from 50% annual crops down to 10%. The gyttja soils were in general more intensively cultivated than the peat soils. The improved estimates of acreage and cultivation intensity of agricultural peat soils were used to calculate annual greenhouse gas emissions from subsidence data. The total carbon dioxide (CO sub(2)) emissions from Swedish agricultural peat soils in 2003 were estimated to be between 3100 Gg CO sub(2) and 4600 Gg CO sub(2), which is similar to or lower than previously reported values. Emissions of nitrous oxide (N sub(2)O) were estimated at 3.2 Gg N sub(2)O in 2003. Estimated combined total emissions of CO sub(2) and N sub(2)O from agricultural peat soils in Sweden in 2003 amounted to 4000-5600 Gg CO sub(2)-equivalents, which corresponds to approximately 6-8% of the total emissions of all greenhouse gases reported by Sweden (excluding the sink for land use, land use change and forestry - LULUCF). Agricultural peat soils represent a minor fraction of the agricultural land in Sweden but still have a significant effect on total national greenhouse gas emissions.
机译：GIS分析中使用了第四纪沉积物的数字化地图，super（40）K辐射数据和农业综合控制系统数据库（IACS）来估算瑞典农业泥炭和gyttja土壤的分布和土地利用。瑞典的农业用地（农田和牧场）总面积估计为3,496,665公顷，其中该地区的8.6％（301,489公顷）被归类为农业泥炭和gyttja土壤，其中深泥炭202,383公顷，浅泥炭50,191公顷。 gyttja土壤48,915公顷。使用农业数据库中有关作物分布的详细信息，可以估算出农业土地的耕种强度（土地利用）。泥炭土农业面积的四分之一是一年生作物的集约耕作，剩余的土地被广泛利用，以管理的草地和牧场为主。不同地区之间的耕种强度差异很大，从每年的50％下降到10％。一般而言，gyttja土壤比泥炭土壤更集约种植。农业泥炭土壤面积和耕种强度的改进估算值用于根据沉降数据计算年温室气体排放量。据估算，2003年瑞典农业泥炭土壤的总二氧化碳排放量（CO sub（2））在3100 Gg CO sub（2）和4600 Gg CO sub（2）之间，与先前的报告值相近或更低。 。一氧化二氮（N sub（2）O）的排放量在2003年估计为3.2 Gg N sub（2）O。据估算，瑞典瑞典农业泥炭土壤中的CO sub（2）和N sub（2）O的总排放总量。 2003年的二氧化碳当量为4000-5600 Gg亚当量，相当于瑞典报告的所有温室气体总排放量的6-8％（不包括用于土地用途的汇，土地用途的变化和林业-LULUCF） 。农业泥炭土仅占瑞典农业用地的一小部分，但对全国温室气体总排放量仍具有重大影响。

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