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| Effects of Non-Hazardous Sewage Sludge Application on Soil Organic Matter and Soil Microbial Biomass Carbon and Nitrogen |
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| KeyWord:non-hazardous sewage sludge utilization; soil organic matter; soil microbial biomass carbon; soil microbial biomass nitrogen |
| Author Name | Affiliation | | LIU Lian | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Jian-feng | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China | | JIANG Hui-min | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China | | YANG Jun-cheng | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China | | DENG Shi-huai | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | GUO Jun-mei | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China | | XIE Yi-qin | College of Resources and Environment, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Shui-qin | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China | | WANG Feng-yuan | Environment College, Liaoning University, Shenyang 110036, China | | LI Ling-ling | Institute of Agricultural Resources and Regional Planning, CAAS, Beijing 100081, China
National Engineering Laboratory for Improving Quality of Arable Land, Beijing 100081, China |
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| Abstract: |
| Applying non-hazardous sewage sludge to land is a good option to utilize wastes. In this study, the effects of different amounts of non-hazardous sewage sludge on soil organic matter（SOM）, soil microbial biomass carbon（SMBC） and nitrogen（SMBN） were investigated in a continuous field experiment with wheat and maize rotation. Four treatments with 3 replicates each, sewage sludge applied at 0 t·hm-2（CK）, 15 t·hm-2（A1）, 30 t·hm-2（A2） and 45 t·hm-2（A3）, were designed. The A3 treatment, significantly increased SOM contents in both wheat and maize season（p＜0.05）, compared with the CK treatment. The average SOM was 17.45 g·kg-1 in wheat season and 26.52 g·kg-1 in maize season, 30.91% and 80.53% higher than the CK, respectively. Both SMBC and SMBN contents were also enhanced significantly（p＜0.05） in the A2 and A3 treatments. In wheat season, SMBC content was 225.91 mg·kg-1 and 321.18 mg·kg-1 in A2 and A3 treatments, respectively, being 144.20% and 247.18% greater than in the CK. In maize season, SMBC contents achieved 154.41 mg·kg-1 and 190.75 mg·kg-1, or increased by 29.19% and 59.60% in A2 and A3 treatment, respectively. Likewise, SMBN contents in the A2 and A3 treatments were 13.53 mg·kg-1 and 23.92 mg·kg-1 in wheat and 29.50 mg·kg-1 and 30.71 mg·kg-1 in maize seasons, or 95.52% and 245.66% and 40.08% and 45.82% increments, respectively. In brief, applications of non-hazardous sewage sludge enhance SOM, SMBC and SMBN, thus improving crop production. |
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