Ảnh hưởng của tính chất đất đến tích lũy và dạng tồn tại của đồng trong đất trồng cây có múi ở Cao Phong, Hòa Bình=Effects of Soil Properties on the Accumulation and Bioavailability of Copper in the Orange Growing Soil in Cao Phong, Hoa Binh

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Tác giả: Thị Tuyết Thu Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học Trái đất và Môi trường, 2024

Mô tả vật lý: tr.131-139

Bộ sưu tập: Metadata

ID: 474355

Thêm vào giỏ

Nghiên cứu này tập trung vào đánh giá ảnh hưởng của một số tính chất đất đến khả năng hấp phụ và dạng tồn tại của Cu trong đất trồng cây có múi ở huyện Cao Phong, tỉnh Hòa Bình. Thí nghiệm bổ sung 0, 100, 500, 1000 mgCu/L vào đất có một số tính chất khác nhau. Kết quả, ở lượng bổ sung 100 mgCu/L đạt hiệu suất hấp phụ cao nhất (>
93,76%) trong đất có tỷ lệ cát 28,44%, limon 40,45% và sét 31,11%
pHKCl và %OC cao hơn và hàm lượng N, P, K, Ca, Mg dễ tiêu thấp hơn. Ngược lại, ở đất có pHKCl thấp hơn, %OC và hàm lượng N, P, K, Ca, Mg dễ tiêu cao hơn thì có hiệu suất hấp phụ thấp hơn (78,32-79,23%). Tổng lượng Cu được hấp phụ tương quan nghịch với lượng Cu bổ sung vào đất 100, 500 và 1000 mgCu/L, theo thứ tự giảm dần từ (78,32-95,67%) xuống (26,67-34,19%) và thấp nhất (22,48-28,56%). Ở đất có Cu tổng số >
200 mg/kg, pHKCl 4,79-5,32 và OC 1,34-2,06% cho kết quả Cu dễ tiêu sinh học 2,29-4,29 mg/kg, ở mức an toàn và đảm bảo đủ nhu cầu vi lượng đối với cây có múi. Cần đưa ra giải pháp phù hợp để quản lý đất ô nhiễm đồng.This study focuses on investigating the crucial influence of some soil properties on the adsorption capacity and fractions of Cu in the citrus-growing soil in Cao Phong district, Hoa Binh province. Batch experiments were conducted by adding 0, 100, 500, and 1000 mgCu/L to soil samples with different characteristics. In the 100 mgCu/L added experiment, we found the highest Cu adsorption rate (>
93.76%) in soil samples with loamy texture, high pHKCl, %OC, and low nutrients. Conversely, the lowest Cu adsorption rates (78.32-79.23%) were observed in soil samples with lower pH, and higher %OC and nutrient availability. Noting that the total adsorbed Cu has a negative correlation with the amount of Cu added to the soil, gradually decreasing from (78.32- 95.67%) to (26.67-34.19%) and the lowest (22.48-28.56%) in soil samples with the added levels of 100, 500, and 1000 mgCu/L, respectively. In soil samples with total Cu >
200 mg/kg, pHKCl 4.79- 5.32, and OC 1.34-2.06%, the bioavailable Cu ranged from 2.29-4.29 mg/kg, which is safe for the soil environment and ecosystem, and sufficient as a micronutrient for citrus plants. It is necessary to find the best solutions for managing Cu-polluted soils.

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