Đăng nhập
Tìm kiếm nâng cao
Tên bài báo
Tác giả
Năm xuất bản
Tóm tắt
Lĩnh vực
Phân loại
Số tạp chí

Bản tin định kỳ
Báo cáo thường niên
Tạp chí khoa học ĐHCT
Tạp chí tiếng anh ĐHCT
Tạp chí trong nước
Tạp chí quốc tế
Kỷ yếu HN trong nước
Kỷ yếu HN quốc tế
Book chapter
Tạp chí quốc tế 2018
Số tạp chí 627(2018) Trang: 544-552
Tạp chí: Science of the total environment

Glyphosate and its main metabolite aminomethylphosphonic acid (AMPA) have frequently been detected in surface water and groundwaters. Since adequate glyphosate mineralization in soil may reduce its losses to environment, improved understanding of site specific factors underlying pesticide mineralization in soils is needed. The aim of this study was to investigate the relationship between soil properties and glyphosate mineralization. To establish a sound basis for resilient correlations, the study was conducted with a large number of 21 agricultural soils, differing in a variety of soil parameters, such as soil texture, soil organic matter content, pH, exchangeable ions etc. The mineralization experiments were carried out with 14C labelled glyphosate at a soil water tension of −15 kPa and at a soil density of 1.3 g cm−3 at 20 ± 1 °C for an incubation period of 32 days. The results showed that the mineralization of glyphosate in different agricultural soils varied to a great extent, from 7 to 70% of the amount initially applied. Glyphosate mineralization started immediately after application, the highest mineralization rates were observed within the first 4 days in most of the 21 soils. Multiple regression analysis revealed exchangeable acidity (H+ and Al3+), exchangeable Ca2+ ions and ammonium lactate extractable K to be the key soil parameters governing glyphosate mineralization in the examined soils. A highly significant negative correlation between mineralized glyphosate and NaOH-extractable residues (NaOH-ER) in soils strongly suggests that NaOH-ER could be used as a simple and reliable parameter for evaluating the glyphosate mineralization capacity. The NaOH-ER were composed of glyphosate, unknown 14C-residues, and AMPA (12%–65%, 3%–34%, 0%–11% of applied 14C, respectively). Our results highlighted the influential role of soil exchangeable acidity, which should therefore be considered in pesticide risk assessments and management to limit efficiently the environmental transfers of glyphosate.

Các bài báo khác
Số tạp chí 50(2018) Trang: 105-110
Tác giả: Đinh Minh Quang
Tạp chí: Pakistan Journal of Zoology
Số tạp chí 13(2018) Trang: 1-9
Tạp chí: Asian-European Journal of Mathematics
Số tạp chí 75(2018) Trang: 58-66
Tạp chí: International Journal of Hospitality management
Số tạp chí Volume 8, Issue10(2018) Trang: 561-569
Tạp chí: International Journal of Scientific and Research Publications
Số tạp chí 2018(2018) Trang: 1-7
Tạp chí: Scientific Programming
Số tạp chí 1(2018) Trang: 1003
Tác giả: Đỗ Tấn Khang
Tạp chí: Annals of Biotechnology
Số tạp chí 27(2018) Trang: 60-67
Tạp chí: Agricultural Marketing Journal of Japan
Số tạp chí 18 (2018)(2018) Trang: 311– 320
Tạp chí: International Energy Journal

Vietnamese | English

Vui lòng chờ...