Distribution of Soil Organic Carbon and Total Nitrogen of the Cultivated Layer under Different Tillage Practices
To evaluate the carbon and nitrogen sequestration capacity of different tillage practices, soil organic carbon and nitrogen concentrations and storages of the cultivated layer under different tillage practices (conventional tillage, no-tillage and fallow) were compared. The results showed that soil organic carbon under different tillage practices were significantly different among different soil depths and 0 - 5 cm >5-15cm>15-30cm (except for the conventional tillage in booting stage). The concentration of soil organic carbon in no-tillage was higher than that in conventional tillage and fallow. The concentrations of soil total nitrogen were significantly different among different treatments in 5 - 15 cm of jointing stage and 0 - 5 cm of booting and ripening stage, and no-tillage > conventional tillage > fallow. Soil organic carbon storage in the cultivated layer (0 - 30 cm) was increased by no-tillage practice, but soil nitrogen storage was not affected significantly by tillage practices. Soil organic carbon and total nitrogen were negatively correlated with pH, exchangeable K+ and Ca2+.
no-tillage organic carbon total nitrogen storage
Xuekun Hou Yaolei Wang Siwei Jiang
Heilongjiang Bayi Agricultural University Daqing, China Institute of Applied Ecology, Chinese Academy of Sciences Shenyang, China
国际会议
山东淄博
英文
664-668
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）