Carbohydrate and protein metabolism of marandu grass affected by nitrogen fertilisation and number of cuts
Laen...
KuupÀev
2023
KĂ€ttesaadav alates
Autorid
Seixas, A.A.
Fries, D.D.
Dias, D.L.S.
Santos, I. A.P.S.
Cruz, N.T.
Teixeira, F.A.
Bonomo, P.
Amaral JĂșnior, F.P.
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Estonian University of Life Sciences
Abstrakt
Understanding the metabolism of tropical grasses in response to management practises
imposed in pastoral environments allows for improvements in the management and use of mineral
fertilisers. This study aimed to quantify metabolite content in different plant parts of Marandu
grass (Urochloa brizantha), with a specific focus on the influence of nitrogen fertilisation and its
effects following successive cuts. The treatments corresponded to four nitrogen (N) rates
(0, 75, 150, and 225 kg N ha-1
) and the number of cuts (one, two and three cuts). The plants were
fractionated into leaves, stems, and roots to assess the content of water-soluble carbohydrates
(WSC), starch, albumin, globulin, prolamin, and glutelin content. N fertilisation influenced the
WSC and starch content in different parts of the plant, varying according to the cuts made. In the
leaves and roots, fertilisation reduced the content of WSC and starch with one cut, as these were
utilised as energy sources for assimilating the excess nitrogen in the soil. There was an increase
in the concentration of all protein groups with nitrogen fertilisation in all parts of the plant with
one cut. In plants cut two and three times, N fertilisation led to specific increases and decreases
in different parts of the plants as an adaptive strategy for allocating resources as the number of
cuts increased. Our results broaden our understanding of carbohydrate and protein metabolism in
tropical grasses, thereby providing subsidies for the rational use of nitrogen fertilisers.
Kirjeldus
Received: June 18th, 2023 ; Accepted: September 30th, 2023 ; Published: October 23rd, 2023 ; Correspondence: angelseixas11@hotmail.com
MÀrksÔnad
cuttings, grasses, nitrogen, regrowth, reserves, articles