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Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides)

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ชื่อเรื่อง : Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides)
นักวิจัย : Jampeetong A. , Brix H. , Kantawanichkul S.
คำค้น : -
หน่วยงาน : มหาวิทยาลัยเชียงใหม่
ผู้ร่วมงาน : -
ปีพิมพ์ : 2557
อ้างอิง : 3043770 , 10.1016/j.aquabot.2011.10.004 , AQBOD , http://www.scopus.com/inward/record.url?eid=2-s2.0-80855129433&partnerID=40&md5=76c55325797cc80a06beb29f4141f6d6 , http://cmuir.cmu.ac.th/handle/6653943832/6012
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : -
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

This study assesses the growth and morphological responses, nitrogen uptake and nutrient allocation in four aquatic macrophytes when supplied with different inorganic nitrogen treatments (1) NH4+, (2) NO3-, or (3) both NH4+ and NO3-. Two free-floating species (Salvinia cucullata Roxb. ex Bory and Ipomoea aquatica Forssk.) and two emergent species (Cyperus involucratus Rottb. and Vetiveria zizanioides (L.) Nash ex Small) were grown with these N treatments at equimolar concentrations (500 μM). Overall, the plants responded well to NH4+. Growth as RGR was highest in S. cucullata (0.12 ± 0.003 d-1) followed by I. aquatica (0.035 ± 0.002 d-1), C. involucratus (0.03 ± 0.002 d-1) and V. zizanioides (0.02 ± 0.003 d-1). The NH4+ uptake rate was significantly higher than the NO3- uptake rate. The free-floating species had higher nitrogen uptake rates than the emergent species. The N-uptake rate differed between plant species and seemed to be correlated to growth rate. All species had a high NO3- uptake rate when supplied with only NO3-. It seems that the NO3- transporters in the plasma membrane of the root cells and nitrate reductase activity were induced by external NO3-. Tissue mineral contents varied with species and tissue, but differences between treatments were generally small. We conclude, that the free-floating S. cucullata and I. aquatica are good candidate species for use in constructed wetland systems to remove N from polluted water. The rooted emergent plants can be used in subsurface flow constructed wetland systems as they grow well on any form of nitrogen and as they can develop a deep and dense root system. © 2011 Elsevier B.V. All rights reserved.

บรรณานุกรม :
Jampeetong A. , Brix H. , Kantawanichkul S. . (2557). Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides).
    เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ .
Jampeetong A. , Brix H. , Kantawanichkul S. . 2557. "Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides)".
    เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ .
Jampeetong A. , Brix H. , Kantawanichkul S. . "Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides)."
    เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ , 2557. Print.
Jampeetong A. , Brix H. , Kantawanichkul S. . Effects of inorganic nitrogen forms on growth, morphology, nitrogen uptake capacity and nutrient allocation of four tropical aquatic macrophytes (Salvinia cucullata, Ipomoea aquatica, Cyperus involucratus and Vetiveria zizanioides). เชียงใหม่ : มหาวิทยาลัยเชียงใหม่ ; 2557.