Strategic planning of grass forage production in North-West Russia
Laen...
Kuupäev
2021
Kättesaadav alates
Autorid
Ajakirja pealkiri
Ajakirja ISSN
Köite pealkiri
Kirjastaja
Abstrakt
Energy and nutritional value of harvested forage rely heavily on grass vegetative phase
and harvesting time. The study aimed to identify rational forage harvesting options in terms
of harvesting time. The data for modelling were taken from the literature based on the results of
many years’ research. The mathematical models of variation of grass mass and quality depending
on days after emergence were created. The possible options of two-step harvesting of forage grass
(cocksfoot, Dactylis glomerata) were considered using mathematical methods of nonlinear
programming: (1) obtaining maximum hay mass with maximum feed units from specified area
of 400 ha and maximum forage yield at full flowering of 15.0 t ha-1
; and (2) identifying
the harvesting timing and area to obtain the required amount of hay (2,500 t) with a target nutrient
content (1,200 feed units). Problem 1 solution was harvesting 1 scheduled for the 45th day after
emergence at full earing on 170 ha; harvesting 2 scheduled for the 69th day after emergence at
full flowering on 230 ha. In this case, 2,066.5 t of hay with 947 feed units would be obtained.
Problem 2 solution was harvesting 1 scheduled for the 43th day after emergence at middle earing
on 250 ha; harvesting 2 scheduled for the 65th day after emergence at early flowering on 156 ha.
The created models can be effectively applied for forage harvesting in any grassland area required
and in any regions.
Kirjeldus
Received: January 31st, 2021 ; Accepted: April 24th, 2021 ; Published: May 20th, 2021 ; Correspondence: papushinea@yandex.ru
Märksõnad
cereal grass, forage harvesting, forage quality, modelling, non-linear programming, strategy, yes-no decision, articles