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Gamba grass (Andropogon gayanus)


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Common names 

Gamba grass, bluestem (Africa, Australia), Rhodesian andropogon (southern Africa), Rhodesian blue grass (Zimbabwe), onaga grass, tambuki grass (north-west Africa), bluestem (USA) [English]; barbon [French]; Gambagras [German]; capim andropógon [Portuguese (Brazil)]; andropogon, gambia, pasto gamba, rabo de zorro [Spanish]; grootbaardgras, Rhodesiese andropogon, hohes bartgras [Afrikaans]; kota-kota, sola, tete-ialikota [Angola]; sméné [Arabic]; koumbossou, irouwa [Benin]; wa [Gambia]; purim pieklega, purim pielega [Ghana]; dagué, guelori, kiené, mussa waga, nguon, uaga, waba, waga, wako, zara [Mali]; ahamdoroem, ajeghar, dakhié, djabar, gamba, lali, radyaré, ranièré, soobre, subna, subu nya, teebeened, yayere, yawiri, yawur [Niger]; bùgànà, dadeppure, ekpo, erè, eruwà, gábàà, gámbà, girman darr daya, igomough, iikube, ikpo, ikpo agu, jimfi, kalawal, madlbak, palawal, sefunkwe, sugu, sugu kal, suwu, suwu bul, suwu kal, waawan ruwa, welho [Nigeria]; badoba, cicca, dagué, ebuk, etiub, gandany, ginyidi, guelori, hat, khat, kiené, makas, mediidi, mussa waga, o nduy, okas, soya, uaga, vaba, waga, waga gué, yev, yew, zara [Senegal]; kabusa, puile [Sierra Leone]; danye, dayye, kagarire, kessé, lanyere, mofogo, mokiri, mopaka, mopoko, pita, ranyere, soporé [Burkina Faso]; aruwa ako funfun, eruwa, eruwa ako, eruwa funfun [Yoruba]; Bagbé, Gbagbé, Saa, Gbaga (Siguiri), Kondolo (Kissidougou) [Malinké]; Béedèn [Kissi]; Dioban, Ndioban [Poular]; Yobanyi, Djobanyi, Séké [Soussou]; Yalipopo [Guerzé] (Quattrocchi, 2006; Cook et al., 2020; Carrière, 2000).


Andropogon bisquamulatus Hochst., Andropogon gayanus var. squamulatus Stapf, Andropogon squamulatus Hochst.


Gamba grass (Andropogon gayanus Kunth) is a perennial leafy grass of tropical Africa. Highly productive, drought- and fire-resistant grass, it forms dense stands used for pastures, hay and cut-and-carry systems. It is relished by livestock when young (before heading) and loses its nutritional value when it matures.


Andropogon gayanus is a tall tufted perennial grass that can reach 2.5 m in height. The culms are numerous (up to 450/plant), erect, branched above, glaucous, 1.5 to 2.5 m in height. The leaf-blades are linear, variable, up to 60 cm long x 4 - 20 mm wide, often narrowed at the base and sometimes falsely petiolate, commonly with an external ligule (a membranous rim at junction between sheath and blade). The inflorescence is a large, leafy false panicle made of 4-10 cm long, paired racemes. The spikelets are sessile, 5–8 mm in length (Kew Science, 2021).


Gamba grass is mainly used as a productive forage that can be grazed or cut to be offered as fresh forage, hay, or silage. Its coarse culms can be used for thatching and matting. The anti-tick effect of Andropogon gayanus grass against Boophilus microplus has been demonstrated experimentally in Mexico by infesting fields with Boophilus microplus larvae over several years (Fernandez-Ruvalcaba et al., 2004). Gamba grass is considered a noxious weed in some places like Australia and Venezuela (Csurhes et al., 1998).


Andropogon gayanus is native to the tropical and sub-tropical savannas of Africa that have extended dry seasons (from Senegal to Sudan, down to Mozambique, Botswana and South Africa). Gamba grass is one of the high-yielding grasses of West Africa. It was introduced in other tropical countries and became naturalized in Australia and South America (DAF, 2020).

Gamba grass is a warm season growing grass with excellent drought tolerance. It is found at the edge of floodplains, moist bottomland, grasslands, wooded savannas, deciduous bushland, and in fallow land and along roadsides (Quattrocchi, 2006). Gamba grass grows on a variety of soils (sandy clays, sandy loams to loamy sands, sands to black cracking clays) in areas situated below an altitude of 980 m and where annual rainfall is ranging from 400 to 1500 mm with a marked 5-6- (9) month dry season. Gamba grass tolerates low fertility, but no waterlogging. It does well in the lowlands, in seasonal swamps with a good drainage that can be flooded during the rainy season with water level reaching up to 2 m aboveground (Ahmed, 1990). In its native habitat, Andropogon gayanus occurs in areas where average minimum temperature does not drop below 4.4° C. However, it is known to tolerate frost (Cook et al., 2020). Gamba grass is tolerant of soils containing free Al or Mg, and tolerant of over-grazing (DAF, 2020; Cook et al., 2020; Dieng et al., 1997).

Forage management 

Andropogon gayanus establishes easily, produces high biomass and is tolerant of long dry seasons and acidic soils (Oliveira et al., 2019; Luck et al., 2019).


It can be cultivated alone, and cultivated without added N. It can produce twice as much dry matter as Urochloa decumbens or Megathyrsus maximus (Cook et al., 2020). Gamba grass does well with twining and erect shrub legumes like Centrosema molle, Neustanthus phaseoloides and Stylosanthes spp., Grona heterocarpa subsp. ovalifolia, G. heterocarpa subsp. heterocarpa, Arachis pintoi, Centrosema acutifolium and C. brasilianum, but may need heavy defoliation to reduce competitiveness (Cook et al., 2020). The protein content of a stand is higher when gamba grass is grown in mixture with legumes (Ahmed, 1990).


Gamba grass can be propagated by seeds (1-10 kg/ha) provided that the seeds are more than 6 month-old, or by young rooted tillers. The seeds can be sown through a drum seeder or out of a fertilizer spinner mixed with fertilizer in a prepared or semi-prepared seedbed, at 1 to 2.5 cm depth (Abdena, 2013; Cook et al., 2020). Seeds may be of low quality, resulting in poor seedling vigour and unreliable establishment so young rooted tillers may also be used (Abdena, 2013). Once established, the young plant should be cut at 15-20 cm to allow tillering (Abdena, 2013; Dieng et al., 1997).


During the first year after establishment, the yield remains low (2-2.5 t DM/ha) but it increases significantly on year 2 and can reach (4-) 6 to 11 (-25) t DM/ha over 3 or 2 cuts (Abdena, 2013; Dieng et al., 1997). Under favourable soil fertility and rainfall, gamba grass productivity can up to 30 t DM/ha. In Brazil, it was reported to outyield species of Urochloa (formerly named Brachiaria). In Northern Territory (Australia), known for its extensive dry season period (7-8 month), annual yields of 4-9 t/ha (up to 20 t/ha) were recorded (Cook et al., 2020).


Gamba grass should always be cut before heading as its nutritive value dramatically decreases with heading. When the harvest is done in only 2 cuts, the forage has medium-low nutritive value; it is then cut for hay. Gamba grass responds well to N fertilizer and when the harvest is done in 3 cuts, it provides higher quality forage and higher biomass (11 t/ha). Under this kind of management gamba grass is mainly cut for silage (Dieng et al., 1997).

Environmental impact 

Invasiveness and soil and water depletion

It is considered a noxious weed in Australia and Venzuela where it smothers native grasses (Smith, 1995 cited by Csurhes et al., 1998).Gamba grass infestations have spread extensively across various landscapes where it has significantly altered soil-nutrient cycles and water cycles as it requires more nutrients and water than native grasses (DAF, 2020)

Fire risk

Dense stands of ungrazed, dry gamba grass constitute fuel reserves that can yield intense fires in the late dry season in Australia and damage native plant communities (Csurhes et al., 1998). Gamba tussocks recover well after fire, thus suppressing native species (Cook et al., 2020)

Soil reclamation

Gamba grass has been used for reclaiming overgrazed and eroded land (Quattrocchi, 2006).

Nutritional aspects
Nutritional attributes 

Andropogon gayanus is considered to have a medium nutritional value when young. It coarsens at maturity and its nutritional value declines after flowering (Miles, 1980; Cook et al., 2020). It has generally a low protein content, up to 7-10% when young (on moderately fertile soils) and lower than 2% when mature (Abdena, 2013). The protein content is higher when gamba grass is grown in mixture with legumes (Ahmed, 1990). It is rich in fibre, with crude fibre being higher than 30% DM. Gamba grass is deficient in Ca, P, Mg, and Na concentrations and only average K content was considered adequate (Morillo et al., 1997).

Potential constraints 


Unlike Brachiaria species with which it has been sometimes compared, gamba grass does not contain high amounts of saponins such as the protodioscin (1 to 1.5 g/kg DM vs. 3.3 to 12.2 g/kg) that can be lethal to sheep (Gracindo et al., 2014).


Andropogon gayanus is relished by all classes of ruminant livestock (cattle, sheep and goats). It is mainly grazed in permanent pastures: it is palatable when young and is used for continuous and rotational grazing (Cook et al., 2020). It is also used for cut-and carry systems or made into hay. As gamba grass is poor in minerals (except K), livestock grazing it exclusively will have to be provided with mineral supplementation to prevent deficiencies.


In Africa, gamba grass is recognized as being a productive and highly palatable fodder when green at vegetative stage (Ibrahim, 2012). Young leaves are palatable, readily eaten and accepted by cattle throughout the year under moderate grazing pressure (Bewabi et al., 2018). Nutritive value declines rapidly with age and a decreasing leaf/stem ratio (Phengsavanh et al., 2003). With maturity, gamba grass produces numerous hard and unpalatable flowering stems. Burning or mowing them could improve the palatability of gamba grass pastures for grazing animals (Aina et al., 2020).

In Ghana, grazing intensity was assessed among a variety of pasture grasses including Andropogon gayanus, Paspalum scrobiculatum, Panicum maximum, Setaria sphacelata, Digitaria decumbens and Sporobolus pyramidalis, Vetivaria fulvibarbis, Brachiaria lata, Cenchrus ciliaris, Eleusine indica, Axonopus compressus, and Heteropogon contortus. Gamba grass was reported to be the preferred species (Tetteh, 1974).

In Benin, gamba grass belonged to the top 16 grasses cited or reffered to for their fodder value by livestock farmers during pasture walks. It was among the most common species used as fodder with Megathyrsus maximus, Pterocarpus erinaceus and Fluegga virosa (Ouachinou et al., 2018)

Digestibility and degradability


Assessement of gamba grass pasture digestibility have been made with in vitro measurements for dry matter (IVDMD) and organic matter (IVOMD). In vitro DM digestibility rose to 63% during the wet season but dropped to 30-40% at the end of the dry season (Cook et al., 2020). In Venezuela, the only factors influencing IVOMD were the frequency of defoliation and rainfall. IVOMD decreased from 54 to 52% with increasing harvest interval from 63 to 84 days, respectively. Digestibility was a function of rainfall. Thus, the highest IVOMD (57%) were found at 63 days of age with high rainfall. These results confirm that gamba grass has moderate nutritional value in terms of digestibility. More frequent harvesting could help to improve gamba grass forage quality even though this might reduce DM yield. N and P fertilizers had no effect on IVOMD (Caraballo et al., 1997).

African basil (Ocimum gratissimum) could be used to reduce quadratically methane emissions arising from the ruminal fermentation of gamba grass by reducing overall digestibility of the forage (Kouazounde et al., 2015).


Apparent in vivo digestibility at three different stages (56, 84 and 112 days of growth) were assessed, and the highest digestibilities were obtained at the earliest stage (56 days) with values of 62%, 56%, 59% and 63% recorded for dry matter, crude protein, crude fibre, and energy respectively (Cavalcanti et al., 2016). Similar results were obtained with DM degradability assessed with the production gas method: gamba grass hay harvested between 56 and 84 days had higher degradability values than hay harvested at 112 and 140 days (Moreira et al., 2013).


A study conducted in Brazil showed that gamba grass produced higher quality silage (higher lactate and lower pH and butyrate content) after 112 days of regrowth. As for hay, IVDMD of gamba grass silage was the best at 56 days of age (57%).

Ensiling can be useful to prevent the reduction of quality during the dry season of tropical savannah. Gamba grass silage, harvested at three stages of maturity (56, 84 and 112 days) from an established pasture was used to evaluate the in situ rumen degradability with cannulated cattle (Ribeiro et al., 2014a). Gamba grass ensiled at 56 days of regrowth had higher nutritional value. Gamba grass ensiled at 84 d of regrowth had highest slowly degradable DM fraction and lowest DM effective degradability. The DM effective degradability decreased with grass maturity because of the increasing stem/leaf ratio and reduction of stem nutritional quality (Ribeiro et al., 2014a)


Gamba grass was reported as one of the most common species used as fodder for grazing cattle in Benin. Supplementation of gamba grass with legumes helped to increase the ruminant production from 90-120 to 150 kg live weight gain/head/yr (Ouachinou et al., 2018).


In Colombia, a study assessed the performance of cattle grazing on a low fertiliser-input and well managed gamba grass dominated pasture (70–75%) with 73% NDF and 8.7% CP during the rainy season and 74 % and 8.9 % CP over the dry season. DM intake of the grazing cattle was 2.33±0.13 % of total LW. The performance of cattle of different ages grazing gamba grass dominated pasture was close to that obtained on pasture of Stylosanthes capitata. Steers grazing the gamba grass pasture gained up to 24% more weight than did cull cows, but the latter emitted significantly less CH4 than the steers (129 vs 141 g/day). Live weight gain could be improved when cattle grazed gamba grass in combination with legumes (Ramirez-Restrepo et al., 2019).


In Nigeria, gamba grass hay was offered to White Fulani heifers at three levels of feeding during the wet season and the dry season (regrowth). The hay DM intake varied from 47.7 to 68.3 g/kg LW0.75. The effect of level of feeding on hay intake was largely independent of the selection for CP and shows that the animals preferred leaves against stems (Zemmelink et al., 1972). Male zebu calves (Wadara) (99.2 kg BW) fed on a gamba grass hay basal diet and concentrate had a daily feed intake of 3.1 kg and daily weight gain of 152.9 g. Supplementation of the gamba grass basal diet with a protein source like pods of Acacia sieberiana had a slight positive effect on feed intake and daily weight gain. Adding A. sieberiana to gamba grass hay reduced feeding costs significantly (Ibeawuchi et al., 1998).



In Brazil, the assessment of daily idleness of sheep on different pastures showed that the highest values were obtained on gamba grass pasture (12.06 h) which suggested that this pasture led to lower acceptability and grazing activity (Sousa et al., 2016). The average daily gain (ADG) of sheep on gamba grass pasture (55g LWG/d) was much lower than on Brachiaria spp. (116 g LW/d) and Megathyrsus maximus (111.6 g LW/d). This suggested that gamba grass is less adequate for sheep than Brachiaria spp. and Megathyrsus maximus pastures (Gracindo et al., 2014).


In Burkina Faso, five tropical forage hays including Andropogon gayanus were fed to Djallonke sheep to measure DM voluntary intake and OM digestibility. DM intake of gamba grass hay ranged from 68 to 26 g/kg BW 0.75, and OM digestibility ranged from 31% to 56%, with both parameters depending on the phenological stage. DM and OM digestibility for gamba grass hay were lower than those obtained for hays of Panicum anabaptistum, Pennisetum pedicellatum, Brachiaria lata and Andropogon pseudapricus (Kaboré-Zoungrana et al., 1999).

In Northern Nigeria, Gamba grass hay remains available when other feeds are scarce and it could be fed to Yakasa rams (18 kg BW). Gamba grass hay could be profitably supplemented with groundnut haulms, a crop residue also available in times of scarcity. Together, gamba grass hay and groundnut haulms could improve the dry matter intake, nutrient digestibility, nitrogen utilization and enhanced growth rates of rams (Mbahi et al., 2016).


In Brazil, gamba grass silage made at different ages of regrowth (56, 84 and 112 d) was used to evaluate intake, digestibility and methane emission from sheep. Silage DM intake ranged from 51.8 to 57.0 g/kg metabolic weight and was not influenced by age of regrowth, but apparent DM digestibility linearly decreased from 53% to 38% with increasing age of regrowth. These results suggest that gamba grass should be ensiled at early age of regrowth (56 d) for better digestive efficiency and silage quality. The age of regrowth did not influence methane emissions. The moderate nutritional value of these silages suggests that protein supplementation would be required to improve animal productivity (Ribeiro et al., 2015a).



In Brazil, grazing goats were observed in three cropping systems consisting in a monoculture of Andropogon gayanus and two intercropping systems of gamba grass + legumes. Gamba grass monoculture had the lowest protein content and digestibility, the highest NDF content and the longest grazing time. Daily DM intake in the gamba grass monoculture was 2.7% LW with an average daily weight gain of 85 g/d. DM intake was lower for gamba grass than for the intercropping mixtures, while the average daily gain did not differ between the systems (Moura et al., 2020).


In Nigeria, gamba grass hay was used to evaluate the effects of four treatments (hay + water, hay + NaOH solution, hay + two native alkali salts from Nigeria) on digestibility with goats. Alkali treatment increased significantly DM intake and improved digestibilities of dry matter, protein, and crude fibre. Daily DM intake on gamba grass was 19.43 g/kg metabolic weight (Ibeawuchi et al., 1991).


Andropogon gayanus is used as forage in traditional rabbit feeding in different tropical countries such as Burkina Faso, Nigeria, or Laos (Sana et al., 2020; Onodugo et al., 2020; Ekwe et al., 2011; Hongthong Phimmasan et al., 2005). In a cafeteria test with 4 other green forages (Centrosema pubescens, banana leaves, oil palm leaves and Calopogonium mucunoides) fresh leaves from 8-week regrowth of gamba grass harvested in early dry season were accepted but were the less palatable of the different forages (Osakwe et al., 2007)

In a study on 3 sources of proteins, gamba hay was used with success as the only additional source of fibre. Distributed in fixed quantity (75g/d//head) daily gamba hay intake represented from 41 to 50% of the total daily intake during the growth period preceding reproduction (Aganga et al., 1991).

Introduced in a balanced diet, gamba grass may represent up to 15% of the diet (not tested at a higher level) without adverse effect on haematological, biochemical profile or carcass characteristics of the rabbits in 8 weeks study on broiler rabbits; growth rate was the best with the higher level of gamba grass (Ibrahim et al., 2018).

In a cafeteria test, gamba silage harvested at soft dough stage, supplemented or not with different legumes forage to increase the protein content of the mixture (from 6.2 up to 8.1% DM), was slightly but significantly preferred without addition of any other forage; unfortunately performance results were available (Muhammad et al., 2009). From a general point of view, silage utilisation in rabbit feeding could be a source of problems if the total daily utilisation in the farm (for rabbits and ruminants if any) is not large enough to maintain day after day the quality of the silo content after opening.

According to the average chemical composition, the calculated) digestible energy content of fresh gamba grass is about 6 MJ/kg DM varying from 7 MJ/kg for an early fresh forage down to 5.6 MJ/kg for the hay (Lebas, 2016). The estimated value of DE is about 6.5 MJ/kg DM for the silage. Calculated digestibility of proteins is low and variable from 25 to 40% (Lebas, 2016).

Nutritional tables

Avg: average or predicted value; SD: standard deviation; Min: minimum value; Max: maximum value; Nb: number of values (samples) used

Main analysis Unit Avg SD Min Max Nb  
Dry matter % as fed 30.9 9.1 13 59.4 328  
Crude protein % DM 7.6 2.9 2.6 19 114  
Crude fibre % DM 36.7 4.7 21.5 50.8 355  
Neutral detergent fibre % DM 72.7 6.9 43.5 84.4 117 *
Acid detergent fibre % DM 43.4 7.6 21.5 55 84 *
Lignin % DM 5.9 1.9 2.3 11 78  
Ether extract % DM 1.7 0.6 0.2 3.9 335  
Ash % DM 9.2 2.2 4.2 16 110  
Insoluble ash % DM 4.1 1.9 0.7 10.9 338  
Gross energy MJ/kg DM 18.1       1 *
Minerals Unit Avg SD Min Max Nb  
Calcium g/kg DM 4.1 1.5 0.8 17.2 399  
Phosphorus g/kg DM 1.8 2 0.1 40 430  
Potassium g/kg DM 16.4 5.9 4.7 46.8 242  
Sodium g/kg DM 0.09 0.08 0.01 0.35 36  
Magnesium g/kg DM 2.1 0.7 0.6 5 260  
Sulfur g/kg DM 2.5   1.4 3.6 2  
Manganese mg/kg DM 193 88 38 511 116  
Zinc mg/kg DM 29 18 8 149 146  
Copper mg/kg DM 8 6 2 32 147  
Iron mg/kg DM 378 324 136 1199 11  
Selenium mg/kg DM 0.4   0.3 0.6 2  
Ruminants nutritive values Unit Avg SD Min Max Nb  
OM digestibility, ruminants % 56.5         *
Energy digestibility, ruminants % 54         *
DE ruminants MJ/kg DM 9.8         *
ME ruminants MJ/kg DM 7.9         *
Nitrogen digestibility, ruminants % 49.9   41.5 56 3  
Dry matter degradability (effective, k=6%) % 31   21 32 3 *
Dry matter degradability (effective, k=4%) % 37         *
a (DM) % 9   6 11 3  
b (DM) % 62   26 83 3  
c (DM) h-1 0.033   0.013 0.064 3  
Rabbit nutritive values Unit Avg SD Min Max Nb  
DE rabbit MJ/kg DM 6.2         *
MEn rabbit MJ/kg DM 6         *
Energy digestibility, rabbit % 34.5         *
Nitrogen digestibility, rabbit % 50.2         *

The asterisk * indicates that the average value was obtained by an equation.


Abaunza et al., 1991; Bartha, 1970; Blair Rains, 1963; Carranza-Montano et al., 2003; CGIAR, 2009; CIRAD, 1991; Deribe Gemiyo Talore, 2015; du Toit, 2017; Evitayani et al., 2004; Evitayani et al., 2004; FUSAGx/CRAW, 2009; González-García et al., 2008; Iyeghe-Erakpotobor et al., 2008; Meale et al., 2012; Odedire et al., 2008; Olafadehan, 2013; Pozy et al., 1996; Rodrigues et al., 2004; Sen et al., 1965; Vanthong Phengvichith et al., 2007; Warly et al., 2006

Last updated on 20/09/2021 16:05:27

Main analysis Unit Avg SD Min Max Nb  
Dry matter % as fed 84.1 12.6 58.4 97.2 21  
Crude protein % DM 4.1 2.9 1.1 9.7 21  
Crude fibre % DM 40.5 3.5 35 47.1 17  
Neutral detergent fibre % DM 78.7 9.8 65.1 85 5 *
Acid detergent fibre % DM 48 9 36.3 56.9 6 *
Lignin % DM 8.5   4.2 11 4  
Ether extract % DM 1.3 0.4 0.5 1.9 16  
Ash % DM 7.1 1.8 3.9 9.9 21  
Insoluble ash % DM 3.9 1.9 0.9 7.3 16  
Gross energy MJ/kg DM 18.3         *
Minerals Unit Avg SD Min Max Nb  
Calcium g/kg DM 3.8 1.3 1.6 6.3 17  
Phosphorus g/kg DM 1.3 0.8 0.3 3.5 17  
Potassium g/kg DM 9.9 4.6 4.6 21 11  
Sodium g/kg DM 0.06   0.04 0.07 2  
Magnesium g/kg DM 2 0.6 1.4 3.3 11  
Manganese mg/kg DM 179   147 232 4  
Zinc mg/kg DM 17   13 20 4  
Copper mg/kg DM 2   2 3 4  
Ruminants nutritive values Unit Avg SD Min Max Nb  
OM digestibility, ruminants % 44.5       1 *
Energy digestibility, ruminants % 41.3         *
DE ruminants MJ/kg DM 7.5         *
ME ruminants MJ/kg DM 6.1         *
Nitrogen digestibility, ruminants % 11.5       1  
Rabbit nutritive values Unit Avg SD Min Max Nb  
DE rabbit MJ/kg DM 5.7         *
MEn rabbit MJ/kg DM 5.6         *
Energy digestibility, rabbit % 31.4         *
Nitrogen digestibility, rabbit % 41.9         *

The asterisk * indicates that the average value was obtained by an equation.


Bennison et al., 1998; Blair Rains, 1963; CIRAD, 1991; Ouédraogo-Koné et al., 2008; Ouédraogo-Koné et al., 2009

Last updated on 21/09/2021 14:13:42

Main analysis Unit Avg SD Min Max Nb  
Dry matter % as fed 24.1 4.4 17.7 31.8 8  
Crude protein % DM 5.7 1.3 3.6 7 8  
Crude fibre % DM 37.4       1  
Neutral detergent fibre % DM 74.1 2.3 70.5 76.5 7 *
Acid detergent fibre % DM 44.3 2.6 37.7 45 7 *
Lignin % DM 6.4 0.7 5.8 7.6 7  
Ether extract % DM 1.9       1  
Ash % DM 6.9 1.3 4.8 9 8  
Gross energy MJ/kg DM 18.4         *
Ruminants nutritive values Unit Avg SD Min Max Nb  
OM digestibility, ruminants % 57.3       1 *
Energy digestibility, ruminants % 53.1         *
DE ruminants MJ/kg DM 9.8         *
ME ruminants MJ/kg DM 7.9         *
Nitrogen digestibility, ruminants % 20.7       1  
Nitrogen degradability (effective, k=6%) % 24   13 30 3  
Nitrogen degradability (effective, k=4%) % 27   18 33 3  
Dry matter degradability (effective, k=6%) % 30   28 33 3  
Dry matter degradability (effective, k=4%) % 36   34 38 3  
Rabbit nutritive values Unit Avg SD Min Max Nb  
DE rabbit MJ/kg DM 6.5         *
MEn rabbit MJ/kg DM 6.4         *
Energy digestibility, rabbit % 35.5         *
Nitrogen digestibility, rabbit % 47.9         *

The asterisk * indicates that the average value was obtained by an equation.


Blair Rains, 1963; Ribeiro et al., 2014; Ribeiro et al., 2014

Last updated on 23/09/2021 17:29:18

Datasheet citation 

Heuzé V., Tran G., Assouma H., Bazan, S., Lebas F., 2021. Gamba grass (Andropogon gayanus). Feedipedia, a programme by INRAE, CIRAD, AFZ and FAO. https://www.feedipedia.org/node/510 Last updated on September 23, 2021, 17:31