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| Soil Labile Organic Carbon as Influenced by Organic-inorganic Compound Fertilizer Made from Ash and Pig Manure |
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| KeyWord:organic-inorganic compound fertilizer; labile organic carbons; total organic carbon; dynamics |
| Author Name | Affiliation | | ZHOU Ling | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China | | ZHANG Shi-rong | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China | | LI Ting | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China | | LI Yun | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China | | XU Xiao-xun | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China | | JIA Yong-xia | Key Lab of Soil Environment Protection in Sichuan Province, College of Resources and Environment, Sichuan Agricultural University, Institute of Ecological Environment, Sichuan Agricultural University, Chengdu 611130, China |
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| Abstract: |
| A field experiment was conducted to study the dynamics of soil labile organic carbon in 0~60 cm soil layer at the growth stage of maize. Five treatments, including no fertilizer（ＣＫ）, chemical fertilizer only（ＮＰＫ） and three application rates of organic-inorganic compound fertilizers made from ash and pig manure（high-CF1, medium-CF2 and low-CF3） were used. Compared to the control, applying organic-inorganic compound fertilizer significantly increased the contents of total organic carbon（ＴＯＣ） and labile organic carbon in 0~60 cm soil layer（P<0.05）, with the most significant effects found in CF2 treatment. The effects of fertilizers on soil labile organic carbons decreased gradually with soil depth. Significant correlations were observed among TOC, easily oxidizable organic carbon（ＲＯＣ）, dissolved organic carbon（ＤＯＣ） and water-soluble organic carbon（ＷＳＯＣ）. ROC and DOC were more sensitive to organic-inorganic compound fertilizers than other organic carbons, which could forecast dynamic of TOC. However, more research is needed to better understand the long term impacts of such organic-inorganic compound fertilizers on soil organic carbon pools. |
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