Tillage and land use effects on methane oxidation rates and their vertical profiles in soil
Tillage and land use effects on methane oxidation rates and their vertical profiles in soil
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DOI：
10.1007/s003740050435
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发表时间：
1998-07-01
影响因子：
6.5
通讯作者：
Hutsch, BW
中科院分区：
文献类型：
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作者：
Hutsch, BW
在一项实验室培养研究中，测试了土地利用和不同土壤耕作制度对甲烷（CH₄）氧化的影响。从一个有翻耕、免耕和休耕处理的农田表层土壤（0 - 12厘米）以及相邻的未受干扰的林地采集了完整的土壤芯。免耕处理的甲烷氧化速率比连续翻耕处理高4.5到11倍，休耕土壤的氧化速率介于两者之间。林地土壤的氧化速率是农田测得的最高速率的11倍，这表明土地利用有显著影响。甲烷氧化活性的垂直剖面在所有处理中都显示出非常明显的分层。甲烷氧化在犁底层（0 - 25厘米）以下显著增加，在免耕（5 - 15厘米）和林地（5 - 10厘米）条件下在地下某一深度达到最大值。休耕条件下的垂直分层与翻耕条件下的相似。一般来说，除非受到各种限制，甲烷氧化活性最大值出现在最接近土壤表面的区域。
The effect of land use and different soil tillage systems on CH(4) oxidation was tested in a laboratory incubation study. Intact soil cores were collected from the topsoil (0-12 cm) of a field site with ploughed, direct-drilled and set-aside treatments. and from an adjacent undisturbed forest site. CH(4) oxidation rates were 4.5 to 11 times higher in the direct-drilled than in the continuously ploughed treatment, in the set-aside soil they were intermediate. The oxidation rates in the forest. soil were II times the highest rate measured at the field site, pointing to a distinct land use effect. Vertical profiles of CH(4) oxidation activity revealed a very clear zonation in all treatments. CH, oxidation increased significantly below the plough layer (0-25 cm), and showed a subsurface maximum under direct-drilling (5-15 cm) and under forest (5-10 cm). The vertical zonation under set-aside was comparable to that under ploughing. Generally, the maximum CH(4) oxidizing activity was in the zone nearest to the soil surface, unless various constraints prevented this.