SOIL SOLUTION CHEMISTRY UNDER TEA GARDEN IN  TAN CUONG COMMUNE OF THAI NGUYEN PROVINCE, VIETNAM

Hoàng Hữu Chiến; Đặng Văn Minh; Nguyễn Quang Thi; Dương Minh Ngọc; Nguyễn Duy Hải; Hoàng Thị Lan Anh; Nguyễn Huy Trung; Tanaka Sota; Iwasaki Kozo

doi:10.34238/tnu-jst.6776

SOIL SOLUTION CHEMISTRY UNDER TEA GARDEN IN TAN CUONG COMMUNE OF THAI NGUYEN PROVINCE, VIETNAM

About this article

Received: 25/10/22 Revised: 18/04/23 Published: 20/04/23

Authors

1. Hoang Huu Chien , TNU - University of Agriculture and Forestry
2. Dang Van Minh, TNU - University of Agriculture and Forestry
3. Nguyen Quang Thi, TNU - University of Agriculture and Forestry
4. Duong Minh Ngoc, TNU - University of Agriculture and Forestry
5. Nguyen Duy Hai, TNU - University of Agriculture and Forestry
6. Hoang Thi Lan Anh, TNU - University of Agriculture and Forestry
7. Nguyen Huy Trung, TNU - University of Agriculture and Forestry
8. Tanaka Sota, Kochi University
9. Iwasaki Kozo, Kochi University

Abstract

The objective of this study is to investigate soil solution chemistry under tea gardens at the alluvial plain of Cong River in Tan Cuong commune, Thai Nguyen province, Vietnam. The study area is the core area for high-quality tea production. Four tea gardens in a transect line established perpendicularly with the river were selected as study sites. Soil solution samples were collected at the depth of 20 cm by using porous cups. The results of the present study are well agreed with those of our previous studies that the nitrification of ammonium fertilizers applied in tea cultivation still occur although the existence of strongly acidic condition and nitrification-derived NO₃^- is the dominant counter anion for leaching loss of base cations. The differences in precipitation between rainy and dry seasons and farming practices in terms of fertilization were responsible for the variation in the volume and chemical properties of the soil solution collected. Annually, soil nutrients have been added through fertilization at the end of dry season but rapidly solubilized and leached down by higher precipitation in the rainy season, especially in coarse-texture soil with high content of kaolin clay mineral adjacent to the river.

Keywords

Soil solution; Chemical properties; Tea gardens; Tan Cuong; Vietnam

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DOI: https://doi.org/10.34238/tnu-jst.6776

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