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Tác giả: Hồng Sơn Nguyễn, Văn Tuất Nguyễn, Văn Bảng Phạm

Ngôn ngữ: vie

Ký hiệu phân loại: 631.4 Soil science

Thông tin xuất bản: Tạp chí nông nghiệp và phát triển nông thôn, 2012

Mô tả vật lý: 10-14

Bộ sưu tập: Metadata

ID: 480871

Research was conducted at large field demonstration with 8 most common rice herbicides: Pretilachlor, Butachlor, Quinclorac, Oxadiazone, Bensulfuron Methyl, Ethoxysulfuron, Fenopro - P - Etyl and Metsulfuron Methyl in Vietnam, aiming to evaluate potential impacts on soil physic and nutrient. Each herbicide was seasonally simultaneous sprayed during 3 rice crop seasons with in the same demonstration plot. Observation was done for soil particle size distribution, soil organic carbon (percent), nitrogen (N, NH4+, NO3), phosphorus (P2O5 total and P2O5 plant available), and potassium (K2O total and plant available). Research findings showed that soil particle size distribution is nearly unchanged after using herbicide through 3 continuously rice seasons. However, Oxadiazon and Metsulfuron trends to show clay accumulation and mineralizing of limon and very fine sand. With the exception of Pretilachlor and Oxadiazone, herbicides have almost no influence on organic carbon status in the soil. Some such herbicides as Pretilachlor, Ethoxysulfuron, Metsulfuron and Bensulfuron, that enable to increase soil carbon showed non-significant differences. Whereas Oxadiazone showed a improvement of soil nitrogen, others did not show any change of this criteria. It was also indicated that herbicide does not influence on total phosphorus but changes plant available phosphorus in the soil, while they did not make any changes on potassium in the soil.
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