摘要
A tillage experiment, consisting of moldboard plow （MP）, ridge tillage （RT）, and no-tillage （NT）, was performed in a randomized complete block design with four replicates to study the effect of 3-year tillage management on SOC content and its distribution in surface layer （30 cm） of a clay loam soil in northeast China. NT did not lead to significant increase of SOC in topsoil （0-5 cm） compared with MP and RT; however, the SOC content in NT soil was remarkably reduced at a depth of 5-20 cm. Accordingly, short-term （3-year） NT management tended to stratify SOC concentration, but not necessarily increase its storage in the plow layer for the soil.
一个耕种实验，由犁板组成犁( MP )，山脉耕种( RT )，和没有耕种( NT )，与四在一个使随机化的完全的块图案被执行复制在东北中国在粘壤土土壤的表面层( 30 厘米)在 SOC 内容和它的分发上学习3年的耕种管理的效果。NT 没与 MP 和 RT 相比在表层土(0 5 厘米) 导致 SOC 的重要增加；然而，在 NT 土壤的 SOC 内容显著地在 5 20 厘米的深度被减少。因此，短期(3 年) NT 管理趋于成层 SOC 集中，然而并非必然增加它在为土壤的犁层的存储。
基金
Project supported by the National Natural Science Foundation of China (Nos.40271108 and 40471125).
