Each cylindrical mesocosm measured 34cm high and 35cm
diameter. The wheat straw was collected from our long-term DBSR
experimental fields. The soil was collected from a rice paddy field
in the Pailou Experimental Station, Nanjing Agricultural University.
The clay soil contained 10.9 g kg−1 organic matter, 0.89 g kg−1 total
nitrogen, 4.3 g kg−1 total phosphorus, 164mg kg−1 available potassium
and had a pHof 7.2. Dry wheat (var. Yangmai 13) straw (357 g,
an amount equivalent to the amount used in the field experiment,
above) was packed in 1mm-mesh bags and buried at a depth of
20cm in the mesocosm. In total, 15 kg of soil were added on top of
the straw bags in each mesocosm.
Each cylindrical mesocosm measured 34cm high and 35cmdiameter. The wheat straw was collected from our long-term DBSRexperimental fields. The soil was collected from a rice paddy fieldin the Pailou Experimental Station, Nanjing Agricultural University.The clay soil contained 10.9 g kg−1 organic matter, 0.89 g kg−1 totalnitrogen, 4.3 g kg−1 total phosphorus, 164mg kg−1 available potassiumand had a pHof 7.2. Dry wheat (var. Yangmai 13) straw (357 g,an amount equivalent to the amount used in the field experiment,above) was packed in 1mm-mesh bags and buried at a depth of20cm in the mesocosm. In total, 15 kg of soil were added on top ofthe straw bags in each mesocosm.
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