tailieunhanh - Bước đầu đánh giá khả năng hấp thụ muối dinh dưỡng nitơ của cỏ vích Thalassia hemprichii tại Nha Trang, Khánh Hoà

Việc đánh giá này dựa trên nguyên lý hấp thụ muối dinh dưỡng của cỏ biển có dạng phương trình động lực Michaelis-Menten. Thí nghiệm hấp thụ muối dinh dưỡng với nhiều nồng độ nitrat khác nhau cho các phần rễ và phần lá. Kết quả cho thấy khả năng hấp thụ muối dinh dưỡng nitơ của cỏ vích đối với phần lá cao hơn so với phần rễ. Mời các bạn tham khảo! | Vietnam Journal of Marine Science and Technology Vol. 20 No. 1 2020 95 103 DOI https 1859-3097 20 1 13301 http jmst Initial evaluation of nitrogen uptake of Thalassia hemprichii in Nha Trang Khanh Hoa Phan Minh Thu1 2 Nguyen Minh Hieu1 Hoang Trung Du1 Nguyen Kim Hanh1 Pham Thi Mien1 Vo Hai Thi1 Le Tran Dung1 Nguyen Trinh Duc Hieu1 1 Institute of Oceanography VAST Vietnam 2 Graduate University of Science and Technology VAST Vietnam E-mail phanminhthu@ Received 30 December 2018 Accepted 15 July 2019 2020 Vietnam Academy of Science and Technology VAST 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 Vmax through the leaves and the roots was 1 gN g DW h and gN g DW h respectively. From these results the nitrate uptake rate by the seagrass in Lo river was estimated at 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. Keywords Seagrass nitrogen uptake Thalassia hemprichii Nha Trang Khanh Hoa. Citation Phan Minh Thu Nguyen Minh Hieu Hoàng Trung Du Nguyen Kim Hanh Pham Thi Mien Vo Hai Thi Le Tran Dung Nguyen Trinh Duc Hieu 2020. Initial evaluation of nitrogen uptake of Thalassia hemprichii in Nha Trang Khanh Hoa. Vietnam Journal of Marine Science and Technology 20 1 95 103. 95 Tạp chí Khoa học và Công nghệ Biển Tập 20 Số 1 2020 95 103 DOI https 1859-3097 20 1 13301 http jmst