Initial evaluation of nitrogen uptake of <i>Thalassia hemprichii</i>  in Nha Trang, Khanh Hoa

Phan Minh Thu; Nguyen Minh Hieu; Hoang Trung Du; Nguyen Kim Hanh; Pham Thi Mien; Vo Hai Thi; [Le Tran Dung]; Nguyen Trinh Duc Hieu

doi:10.15625/1859-3097/20/1/13301

Author affiliations

Authors

Phan Minh Thu Institute of Oceanography, VAST, Vietnam Graduate University of Science and Technology, VAST, Vietnam y https://orcid.org/0000-0002-7394-0728
Nguyen Minh Hieu Institute of Oceanography, VAST, Vietnam
Hoang Trung Du Institute of Oceanography, VAST, Vietnam
Nguyen Kim Hanh Institute of Oceanography, VAST, Vietnam
Pham Thi Mien Institute of Oceanography, VAST, Vietnam
Vo Hai Thi Institute of Oceanography, VAST, Vietnam
[Le Tran Dung] Institute of Oceanography, VAST, Vietnam
Nguyen Trinh Duc Hieu Institute of Oceanography, VAST, Vietnam

DOI:

https://doi.org/10.15625/1859-3097/20/1/13301

Keywords:

Seagrass, nitrogen uptake, Thalassia hemprichii, Nha Trang, Khanh Hoa.

Abstract

The uptake rate of nitrate by leaves and roots was simultaneously investigated in the seagrass T. hemprichii collected from Lo river, Nha Trang. The principle of nutrient uptake of seagrass was based on the approaches of the Michaelis-Menten model. The laboratory experiments of nitrate uptake were done the ranges of ambient nitrate concentrations in the separate water column of leaves and roots. The calculated results indicated that the nitrate uptake rate through the leaves was higher than that of the roots. The maximum uptake rate (V_max) through the leaves and the roots was 1,777.0 mgN/g DW/h and 131.6 mgN/g DW/h, respectively. From these results, the nitrate uptake rate by the seagrass in Lo river was estimated at 52.2 mgNm^-2h^-1. The value plays an important role in developing and implementing plans for the protection and rehabilitation of seagrass beds in coastal areas.

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