ЭлБиб

Аграрная наука Евро-Северо-Востока, № 3 (58), 2017 г.

Fodder value of sweet sorghum

Kovtunova N.А.,

PhD in agriculture, head of laboratory,

Ermolina G.M.,

PhD in agriculture, senior research,

Gorpinichenko S.I.,

PhD in agriculture, senior research,

RomanyukinА.Е.,

PhD in agriculture, senior research,

Agricultural Research Center ‘Donskoy’, Zernograd, Rostov region

Sweet sorghum is used for silage, grass flour, hay and grain haylage, green fertilizing and grazing. Now the Agricultural

Research Center ‘Donskoy’ developing varieties and hybrids of sweet sorghum for forage with reduced amount of fiber and in-

creased amount of protein in dry matter of green chop. The purpose of the work is to give economic-and-biological characteris-

tics and evaluation of economic efficiency of cultivation of sorghum varieties and hybrids developed in ARC ‘Donskoy’, and to

study nutritional value of sorghum forage. The researches were carried out in ARC ‘Donskoy’ in 2014-2016. The objects of the

study were three varieties ‘Zernogradsky Yantar’, ‘Debyut’ and ‘Listvenit’, a new variety ‘SV-44’ and three hybrids of grain sor-

ghum ‘Zersil’, ‘Elisey’ and ‘Start’. The green chop productivity of the varieties ranged from 38 to 49 t/ha, the green chop produc-

tivity of the hybrids ranged from 51 to 58 t/ha. The content of dry matter in the green chop of the varieties and hybrids varied

from 32.6 to 35.5%, the content of raw protein varied from 7.2 to 7.7%, the content of fiber varied from 37.7 to 39.6%.Green

chop for silage obtained from sweet sorghum possesses highest nutritional value at swine feeding. Dry matter of green chop ob-

tained from the variety ‘Debyut’ and the hybrid ‘Start’ possessed the largest content of fodder units (122.4 kg and 122.3 kg re-

spectively) and exchangeable energy (1327 MJ and 1336 MJ respectively). All the varieties and hybrids of sweet sorghum meet

the requirements in amount of digestible protein (105-110 g). The largest amount of digestible protein per fodder unit was seen in

green chop of the hybrids ‘Elisey’ and ‘Start’ (138 g and 135 g respectively).

Key words:

sweet sorghum, green chop, silage, productivity, fodder units, exchangeable energy, quality

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