| Effects of different fertilizers on soil enzyme activities and soil CO2 emission under no-tillage on dry land in farming-pastoral zone of northern China |
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| DOI：10.7606/j.issn.1000-7601.2010.05.16 |
| Key Words: dry farming oat no-tillage soil enzyme activity CO2 emission |
| Author Name | Affiliation | | ZHANG Zhidong | Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | LIU Jinghui | Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | YU Qing | East Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa K1A 0C6, Canada | | WANG Yongqiang | Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | CUI Fengjuan | Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China | | WANG Runlian | Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China |
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| Abstract: |
| Soil enzymatic activities and CO2 emission of no-tillage lands with different treatments of fertilizers was determined, analysed and estimated for their effects on soil enzymatic activities and CO2 emission under no-tillage lands in farming-pastoral zone of northern China and their correlations. Valuable data were provided for improving soil quality, enhancing farmland carbon sequestration, reducing CO2 emission and conducting sustainable utilization in dry land region. The results showed: the soil enzymatic activities and CO2 emission in the fertilizer treatments were higher than those from the no-fertilizer treatment under no-tillage. The increased activities of Alkali phosphates, Ivertase and CO2 emission was mostly influenced by N-fertilizer, followed by P-fertilizer and K-fertilizer while the increased Catalase activities were mainly affected by K-fertilizer. The soil enzymatic activities and CO2 emission was further enhanced by the combined uses of NP-fertilizer or NPK-fertilizer. However, K-fertilizer treatment, compared to N-P fertilizer treatment, showed a better incr
ease on Catalase activity. Conclusively, a highly positive correlation existed between soil CO2 emission and Ivertase and Urease activity while Alkali-phosphates and Catalase activity do not correlate CO2 emission. |
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