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Maize stalks from mature plants were collected from the cropland of Jianxian (Tianjin, China). Following collection, the stalks were cut into small pieces (2–3 cm length) and then soaked for 24 h in 3% sodium hydroxide solution. Subsequently, the soaked maize stalks were flushed with running water repeatedly until the pH of the water was approximately 7.0. Maize stalks pretreated with sodium hydroxide are hereafter referred to as MSSH. The elemental composition of maize stalks and MSSH are given in Table 1.

Table 1

Elemental composition of the carbon source

Carbon sourceC (%)N (%)H (%)S (%)
Maize stalks 46.93 ± 0.32 2.09 ± 0.20 5.66 ± 0.36 0.67 ± 0.28 
MSSH 45.79 ± 0.39 1.18 ± 0.18 6.17 ± 0.25 0.39 ± 0.42 
Carbon sourceC (%)N (%)H (%)S (%)
Maize stalks 46.93 ± 0.32 2.09 ± 0.20 5.66 ± 0.36 0.67 ± 0.28 
MSSH 45.79 ± 0.39 1.18 ± 0.18 6.17 ± 0.25 0.39 ± 0.42 

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