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• W2362860003 abstract "A filed experiment was conducted to investigate effect of long term ridge-cultivation without tillage on distribution of soil organic carbon(SOC) in profiles of paddy fields.The experiment included four cultivation treatments: Ridge-cultivation without tillage(rice),ridge-cultivation without tillage(rice-rape),plain-cultivation(rice) and plain-cultivation(rice-rape).The results showed that the highest and lowest SOC concentrations in different layers(0-10 cm,10-20 cm,20-40 cm and 40-60 cm) of paddy fields were respectively found in ridge-cultivation without tillage(rice-rape) and plain-cultivation(rice-rape) after different cultivation treatments were conducted for 20 years.SOC concentrations in different soil layers were significantly lower in plain-cultivation(rice-rape) treatment,as compared with other cultivation treatments.SOC concentrations in the 0-10 cm and 40-60 cm layers had no significantly difference among ridge-cultivation without tillage(rice),ridge-cultivation without tillage(rice-rape) and plain-cultivation(rice).SOC concentration in the 20-40 cm layer was significantly higher in paddy fields under ridge-cultivation without tillage(rice-rape) when compared to paddy fields under other cultivation treatments(P0.05).The results showed that accumulation of organic carbon in the 20-40 cm layer was much more obvious in paddy fields under ridge-cultivation without tillage(rice-rape) when compared to paddy fields under traditional cultivation treatment.After different cultivation treatments were conducted for 20 years,SOC densities in the 0-60 cm layer of paddy fields decreased in the order of ridge-cultivation without tillage(rice-rape) ridge-cultivation without tillage(rice) plain-cultivation(rice) plain-cultivation(rice-rape),and there was significantly difference among all the treatments(P0.05).During ridge-cultivation without tillage was conducted in paddy fields for 15～20 years,organic carbon storage was kept stable in the 0-10 cm layer and obviously increased in the 20-40 cm layer,and the increase of organic carbon storage in the 20-40 cm layer was more obviously in ridge-cultivation without tillage(rice-rape) system when compared to ridge-cultivation without tillage(rice) system.The results showed that accumulation of organic carbon in the 20-40 cm layer was an important mechanism for paddy fields under long term ridge-cultivation without tillage to sequestrate organic carbon continually." @default.
• W2362860003 created "2016-06-24" @default.
• W2362860003 creator A5006969535 @default.
• W2362860003 date "2012-01-01" @default.
• W2362860003 modified "2023-09-25" @default.
• W2362860003 title "Effect of Long Term Ridge-cultivation Without Tillage on Distribution of Organic Carbon in Soil Profiles of Paddy Fields" @default.
• W2362860003 hasPublicationYear "2012" @default.
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