Welcome to Chinese Agricultural Science Bulletin,
|
|
||||||||||||||||
|
Effects of Combined Application of Sugar Mill Sludge and Biochar on Basic Properties and Organic Carbon Components of Black Soil in Northeast China
Chinese Agricultural Science Bulletin
2024, 40 (26):
38-45.
DOI: 10.11924/j.issn.1000-6850.casb2024-0231
The study investigated the effects of combined application of beet and sugar plant waste sludge and biochar on the fundamental properties and organic carbon components of farmland soil in Northeast China black soil region. Eight treatments were set up for comparison: no material returned to the field (CK1), 20000 kg/hm2 biochar without filter mud (CK2), 16.67 kg/hm2 filter mud without biochar (T1), 16.67 kg/hm2 filter mud with 20000 kg/hm2 biochar (T2), 33.33 kg/hm2 filter mud without biochar (T3), 33.33 kg/hm2 filter mud with 20000 kg/hm2 biochar (T4), 50 kg/hm2 filter mud without biochar (T5), and 50 kg/hm2 filter mud with 20000 kg/hm2 biochar (T6). Soil total carbon, total organic carbon, easily oxidized organic carbon, water-soluble organic carbon, particulate organic carbon, environmental factors such as alkali-hydrolyzed nitrogen, available phosphorus and available potassium, as well as soil biological activities including urease, phosphatase and sucrase were analyzed to discuss the effects of each treatment on organic carbon components and carbon pool management index. The results indicated that the combined application of filter sludge and biochar significantly increased soil total organic carbon content, easily oxidized organic carbon content and carbon pool management index. The application also affected active carbon components by enhancing available nutrients and enzyme activities which led to an increase in the soil's overall stability. In conclusion, it was found that T4 treatment, a combination of 33.33 kg/hm2 filter sludge with 20000 kg/hm2 biochar, yielded the most favorable results in terms of achieving soil carbon sequestration, increasing CPMI content, and improving the stability of soil organic carbons.
表1
试验小区土壤基本理化性质 mg/kg
Other Images/Table from this Article
|
