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| Effect of mulching patter on soil carbon and nitrogen in arid plateau area of Loess Plateau |
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| DOI：10.16768/j.issn.1004-874X.2017.01.011 |
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| Abstract: |
| The effects of different mulching patters on soil organic carbon，total nitrogen，microbial biomass
carbon and microbial biomass nitrogen were studied to provide theoretical basis for the dynamic change of soil carbon
and nitrogen，and the management of dry farmland. A positionable experiment of spring maize was conducted in Loess
Plateau，which set up three different mulching patters：without mulching treatment as control（ CK），straw mulching
at a rate of 9 000 kg/hm2（ SM） and degradable plastic film mulch（PM）. The results showed that compared with
CK，straw and plastic film mulching significantly increased the contents of SOC，TN，MBC and MBN in soil layer.
The effect of SM treatment was better than PM treatment. There were significant positive correlations among different
indexes（ P<0.05），except TN and MBC，which showed close relationship between soil organic carbon and total
nitrogen. The storage capacity of MBC and MBN in a large extent depended on SOC and TN，which respond rapidly to
SOC dynamic change. The contents of SOC，TN，MBC and MBN decreased with the decline of soil layer. |
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