不同耕作方式对黑土有机质和团聚体的影响

Effect of Different Tillage Managements on Organic Matter and Aggregates in Black Soil

对吉林省公主岭市长期定位试验站不同耕作方式下黑土有机质含量和团聚体组成进行了测定分析,结果表明,与传统耕作秋翻秋耙匀垄相比,宽窄行交替休闲处理和全方位旋耕处理增加了土壤表层有机质含量和0～30cm范围内>0.25mm水稳性团聚体数量,改善了土壤结构。宽窄行交替休闲处理对于提高深层土壤有机质含量也有显著效果,优于其他处理,应加以提倡。

The organic matter and aggregates of black soil under different tillage managements were determined and analyzed after long-term locating experiment in the Gongzhuling city of Jiling province. The results showed that wide/narrow row alternation and omnibearing rotary tillage increased the content of soil organic matter in surface soil and the amount of 〉0.25 mm water stable aggregates at 0-30 cm layer by compared with conventional tillage. Wide/narrow row alternation could observably increase the organic matter content of deep soil. In general, wide/narrow row alternation treatment was superior to other treatments and should be recommended.