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 Advanced green bioprocess of soil carbohydrate extraction from long-term conversion of forest soil to paddy field
Tác giả hoặc Nhóm tác giả: Nguyen-SyToan, XuefeiTan, Nguyen Thi DongPhuong, Nurul Syahirah MatAron, Kit WayneChew, Kuan ShiongKhoo, Tran Thi NgocThu, DuongThi Lim, Pham DuyDong, Wei LunAng, Pau LokeShow
Nơi đăng: Journal of Environmental Chemical Engineering (SCIE, Q1); Số: xxx;Từ->đến trang: 1-13;Năm: 2021
Lĩnh vực: Nông lâm ngư; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The present research aims to study the long-term impacts of soil extractable carbohydrate content from the conversion of forest to paddy field, using three environmentally friendly methods: ultrasound assist (37 Hz/ 30 min), hot water (80°C/ 4 h), and cold water (25°C/ 30 min). Soil samples collected at the depth of 0 - 15 cm from natural forest, rice paddy, and border area were extracted by distilled water at the ratio 1:10 (soil: water). Contents of soil organic carbon (SOC) and extracted carbohydrate (ECH) in the natural forest and rice paddy were similar, and higher than in border area by 50%. Results showed the highest content of ECH was extracted using hot water (304 - 691 mg.Carbohydrate/kg soil, 4% of SOC), followed by ultrasound (102 - 305 mg.Carbohydrate/kg soil, 1.7% of SOC), and the lowest amount addressed to cold-water extraction (65 - 252 mg.Carbohydrate/kg soil, 1.2% of SOC). The ECH/SOC ratios in three soil types were the same and ranged from 0.9% to 4.2%. We conclude the long-term conversion of forest to rice paddy maintain both SOC and ECH, furthermore, hot water extraction at 80°C/ 4 h is the optimum method for extraction of carbohydrate using non-chemical solvents.
ABSTRACT
The present research aims to study the long-term impacts of soil extractable carbohydrate content from the conversion of forest to paddy field, using three environmentally friendly methods: ultrasound assist (37 Hz/ 30 min), hot water (80°C/ 4 h), and cold water (25°C/ 30 min). Soil samples collected at the depth of 0 - 15 cm from natural forest, rice paddy, and border area were extracted by distilled water at the ratio 1:10 (soil: water). Contents of soil organic carbon (SOC) and extracted carbohydrate (ECH) in the natural forest and rice paddy were similar, and higher than in border area by 50%. Results showed the highest content of ECH was extracted using hot water (304 - 691 mg.Carbohydrate/kg soil, 4% of SOC), followed by ultrasound (102 - 305 mg.Carbohydrate/kg soil, 1.7% of SOC), and the lowest amount addressed to cold-water extraction (65 - 252 mg.Carbohydrate/kg soil, 1.2% of SOC). The ECH/SOC ratios in three soil types were the same and ranged from 0.9% to 4.2%. We conclude the long-term conversion of forest to rice paddy maintain both SOC and ECH, furthermore, hot water extraction at 80°C/ 4 h is the optimum method for extraction of carbohydrate using non-chemical solvents.
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