Đặc tính hình thái và hóa học của phẫu diện đất canh tác lúa tại thị xã Long Mỹ, tỉnh Hậu Giang

TRẦN THỊ THÙY TRANG, PHAN CHÍ NGUYỆN, NGUYỄN TUẤN ANH, TRẦN TRỌNG KHÔI NGUYÊN, NGUYỄN ĐỨC TRỌNG, NGUYỄN QUỐC KHƯƠNG.

Từ khóa

Tóm tắt

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Ngày nhận bài

: 06/05/2024

Ngày chuyển phản biện

: 17/05/2024

Ngày thông qua phản biện

: 07/06/2024

Ngày duyệt đăng

: 13/06/2024


Đã xuất bản

30/06/2024

Cách trích dẫn

Lĩnh vực

Số thường kỳ

Morphological and chemical characteristics of soil profiles for rice cultivation in Long My town, Hau Giang province

CoAuthor

CAO THI VIET NGA, NGUYEN THI NHU QUYNH, NGUYEN THI THO, VU QUANG NAM.

Keywords

Acid sulfate soil, alluvial soil, rice, soil properties.

Abstract

The study was performed with an aim to determine morphological and chemical features of the soil profiles for rice growth in Long My town, Hau Giang province. The morphological description was based on the Munsell soil colour chart comparison table under the field condition, and the analysis of soil chemical properties of 5 profiles for rice soil was performed under the laboratory condition. Based on the morphological characteristics, the soil for growing rice was suitable for rice development, with extremely deep acid sulfate-bearing materials (>100 cm below the surface). The profiles belonged to the alluvial soil series, and had the Mollic horizon. The soil name, according to the classification of FAO-WRB (2006), was Molli Gleysols (Bathi Proto Thionic) - Glmo(dtip). The chemically analytic results showed that pHKCl at the surface of the 5 profiles fluctuated roughly 3.01 - 6.15, and was considered to be at the acidic threshold. The total nitrogen content (0.126 - 0.406%) was moderate, and the total P content (0.014 - 0.042%) was considered poor threshold. The available nitrogen content and the soluble P content were determined as 43.9 - 264.3 mg NH4+ kg-1 of soil, and 0.11 - 25.6 mg P kg-1 of soil, respectively. The toxicity of Fe2+ and Al3+ was up to 88.0 mg Fe2+ kg-1 of soil and 3.38 meq 100 g-1 of soil, respectively. The organic matter content was moderately high, while the cation exchange capacity was low.