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Golden millet (Setaria sphacelata)

IMPORTANT INFORMATION: This datasheet is pending revision and updating; its contents are currently derived from FAO's Animal Feed Resources Information System (1991-2002) and from Bo Göhl's Tropical Feeds (1976-1982).

Datasheet

Description
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Common names 
African bristle grass, African pigeon grass, canary seed grass, common setaria, golden bristle grass, Rhodesian grass (southern Africa), golden millet, golden setaria, golden timothy (Zimbabwe), Kazungula setaria, pigeon grass, pigeongrass, setaria (Australia), Rhodesian grass, Setaria (Australia), South African pigeon grass [English]; sétaire d'Afrique [French]; capim de Congo, capim maranga, setaria, setaria narok, capim-setária, napierzinho (Brazil) [Portuguese]; cola de perro, mijo silvestre, rabo de cachorro, setarea, narok, zacate setaria, pasto nandi, zacate nandi, pasto san Juan (Costa Rica), pasto miel (Ecuador), fleo dorado (Mexico) [Spanish]; 南非鴿草 [Chinese]; Mannagras [Afrikaner];
  • Var. anceps : golden bristle grass, golden millet, south African pigeon grass, rhodesian grass, setaria, capim setária, napierzinho, pasto san juan, pasto miel, fleo dorado, golden timothy.
Synonyms 

Var. anceps (Stapf) Veldkamp : Setaria anceps Stapf, Setaria anceps Stapf var. sericea Stapf, Setaria sphacelata (Schumach.) Stapf & C.E. Hubb. var. sericea (Stapf) Clayton, nom. illeg.

Taxonomic information 

Setaria sphacelata is a highly variable species that has different subspecies. While Setaria sphacelata var. anceps is called Golden millet and documented in this datasheet, the supbspecies Setaria sphacelata var. spledida is detailed in the Giant setaria datasheet.

Description 

Goden millet (Setaria sphacelata) is a stout, usually tufted, and shortly rhizomatous perennial grass. A producive and variable species, of which numerous subspecies and varieties have been described and many commercial cultivars have been developed for various climates and soil conditions. It is cultivated worldwide for pasture and for cut fodder. It can be used to make silage and finer types are reported to be suitable for hay making (Cook et al., 2005). It may also be used as ground cover for soil conservation (FAO, 2017).

Morphology

Setaria sphacelata produces short rhizomes and many flattened blue-green stems up to 1.8-2 (-3) m high. The leaves are bluish grey green, soft and glabrous, 50 cm long x 1-1.7 cm wide, with long pointed tips (DEEDI, 2016; Cook et al., 2005). The inflorescence is a spike-like 7-25 cm long x 8 mm wide, dense narrow panicle, that radiates golden-yellow bristles (Cook et al., 2005; FAO, 2017). 

Uses

Golden millet is an important fodder plant in Africa. Its relatively easy establishment from seeds makes it worth using for pasture development (Hacker, 1992). Setaria sphacelata was reported to be as productive as Rhodes grass and Molasses grass (van Wijk, 1980). Golden millet is important in crop rotation with maize and cereals mainly in mixed farming systems (van Wijk, 1980). Golden millet can be used for pasture, cut-and-carry carry systems and hay (finer types like Nandi cv.) (Cook at al., 2005). Golden millet also makes good silage. It forms stable groundcover for soil conservation (Cook et al., 2005). Golden millet seeds are important food source for several bird species, including the long-tailed widowbird (Hockey et al., 2005).

Distribution 

Golden millet (Setaria sphacelata) originated from tropical and subtropical Africa. It was introduced to many countries in South East Asia, America and Oceania (Australia, New Zealand and some Pacific Islands) where it became naturalized (Cook et al., 2005). It is cultivated under irrigation in Morocco and Israel (Bogdan, 1977). It is considered a weed in 3 states of Australia (Moore, 2016).

Golden millet (Setaria sphacelata) is naturally found on grassland, woodland, roadsides, disturbed sites, waste areas and swampy places, usually on clay soils but also on rocky hillsides (FAO, 2017; Cook et al., 2005). In medium to high natural grasslands of East Africa, golden millet may represent  a considerable proportion of the herbage though not dominant (Hacker, 1992).

Golden millet is found in both hemispheres from 29°N to 5°S found and from sea level to an alitude of  2600 m (-3300 m) (FAO, 2017). Golden millet is a spring and summer growing species but it keeps growing late in autumn (Moore, 2016). Golden millet grows at higher altitudes than panicoid pasture grass as it survives freezing temperatures (Hacker, 1992). It does better when temperatures are between 18-22°C but can still grow during winter if frost is not too heavy (FAO, 2017). Golden millet grows usually in places  with over 750 mm annual rainfall. For cultivation, wetter places with more than 1000 mm are preferred. Golden millet has variable tolerance of waterlogging and flooding, and generally low tolerance of drought (Cook et al., 2005; van Wijk, 1980). Some cultivars such as Kazungula are however, particularly suited to wet lowlands while having good drought tolerance (Cook et al., 2005).

Golden millet thrives on moist fertile soils but can also grow on poor sandy and stony soils. It generally grows on soils with pH of 5.5-6.5 and does not withstand either acidic conditions, alkalinity or salinity (FAO, 2017). Golden millet is fairly tolerant of shade: its yield is reduced by 50% under 60% shade  (Cook et al., 2005). Once established, the species is tolerant of fire and regrowth may even be more tillering after burning (Cook et al., 2005).

Cultivars of golden millet (Setaria sphacelata) have been released to satisfy different cultivation conditions. Some of their characteristics are summarized below

Main cultivars characteristics

Name

Temperature

Moisture

Establishment

Oxalates

Forage quality

Nandi

Sensitive to frost

Waterlogging tolerance, no drought tolerance

fair

3.22% (moderate)

Leafy, good quality

Kazungula

Frost tolerant

Warterlogging, flooding  and drough tolerance

Easy, robust plant

3.3–7.0% (high)

Coarse, very stemmy at maturity but well accepted

Narok

Frost resistant

Warterlogging, flooding  and drough tolerance

keep growing during cool season

+++

Leafy, palatable

 

Forage management 

Yield

Golden millet average DM yield ranges from 10 to 15 tons/ha. However much higher yields of 26-28 tons/ha have been reported from well-fertilised irrigated stands (FAO, 2017; Cook et al., 2005).

Pasture management

Golden millet can be successfully sown or vegetatively propagated. Vegetative propagation is however time-consuming (Bogdan, 1977). Seeds should be drilled at a rate of 2 kg/ha in a well-prepared seedbed no deeper than 1.8-2.5 cm depending on cultivar (Moore, 2016; Cook et al., 2005). Golden millet should be sown during spring-midsummer period as optimal period for growth is from spring to autumn (FAO, 2017).  Golden millet establishes relatively slowly but reliably provided the seed can benefit from soil moisture.

Vegetative propagation is also possible and reliable: it can be done after cutting tufts to a height of 15 cm, splitting them in units of 1-3 tillers and planting vertical in moist soil. Root stocks can also be used for propagation (Hacker, 1992). 

Golden millet can be sown with companion legumes such as Neonotonia wightii, Desmodium intortum, D. uncinatum, Macroptilium atropurpureum, Vigna parkeri, Lotus uliginosus, Trifolium repens (Cook et al., 2005; Bogdan, 1977). Such association is profitable if soil K status is maintained. In Himalayan rangelands, golden millet is grown in association with soybean and berseem and it provides good amount of dry matter. The association is reported to be one of the most profitable (Bhag Mal, 2007).

On the contrary, it is not recommended to sow golden millet with other grasses (FAO, 2017; Cook et al., 2005).

A small-seeded species, golden millet does not establish readily and, to this respect, is less favorable than Rhodes grass (Hacker, 1992; van Wijk, 1980). Golden millet shoud be weeded frequently till establishment occurs (ILRI, 2017). However, once well established it competes with weeds  and is more persistant than Rhodes grass. Golden millet responds positively to N and K fertilisers (Hacker, 1992, van Wijk, 1980).

Golden millet shoud be leniently grazed until establishment since grazing can cause uprooting of young plants (FAO, 2017).Once establishment is obtained, it is recommended to have golden millet heavily grazed so as to maintain good quality forage because of its tendency to become stemmy and coarse.  In Queensland, the highest yield of forage was obtained by cutting every three weeks at a height of 15 cm (FAO, 2017).

In mixed stand, continuous and heavy grazing is not a problem for golden millet but can be deleterious to companion legume (Hacker, 1992). However, cultivar Kuzungula is prone to shade companion legumes if not heavily grazed (FAO, 2017).

Cut-and-carry systems

In India, golden millet is used for cut-and-carry systems. First cutting can be done after 3 months of planting (sowing) and subsequent cuttings every 3-4 weeks in well irrigated and properly manured pastures (Trivedi, 2002).

Hay and silage

Most golden millet varieties are tall and coarse and become stemy with maturity; they are thus not recommended for hay. Hoiwever, leafy Cv. Nandi is leafy has thinner stems: it is thus more suitable to make hay and was reported to need only 50-70 hours to cure and had no more than 5% DM losses provided it was cut in the afternoon (Catchpoole, 1968). It was also possible to obtain good quality silage with Nandi grass with addition  (or not) of molasses or Desmodium intortum (Catchpoole, 1968; Catchpoole, 1965). Cultivar Kazungula is used widely for silage in southern Africa (FAO, 2017).

Standover and deferred feed

Though coarse at late stages of maturity, golden millet standover provides low-quality roughage, as a supplement to urea-molasses feeding. It is used for this purpose in Kenya and Uganda, but losses of crude protein and dry matter may reach 33 percent (FAO, 2017).

Environmental impact 

Weed

Setaria sphacelata has become naturalised in many countries and is a significant environmental weed in three Australian states

Erosion control

Thanks to its large crown, cultivar Kazungula was reported to provide good erosion control when sown in contour strips (FAO, 2017).

Nutritional aspects
Potential constraints 

Oxalates

Golden millet forage contains moderate to high levels of oxalates, depending on variety, stage of growth, fertiliser level, part of plant, etc... N fertilized golden millet  or golden millet cultivated in association with a legume species had higher oxalate content (Jones et al., 1970).

Due to this high oxalate content, golden millet (Setaria sphacelata) is unsuitable for horses (Moore, 2016). It causes "Big head disease" (Osteodystrophia fibrosa), a calcium imbalance due to the binding of Ca by oxalates in the horse's intestine. Horses with big head disease have affected gait, poor performance and swelling of bones of the head (DAF, 2010).

It has also been reported to occasionnally cause nephrosis and hypocalcaemia in ruminants though cattle can get used to oxalates (developping adequate ruminal flora) and it is possible to alleviate oxalate effect with a provision of Ca (Moore, 2016; Cook et al., 2005; Boonman, 1993). Outbreaks of cattle poisoning were reported in swards containing high proportion (>95%) of golden millet in Queensland (Moore, 2016; Jones et al., 1970). 

Ruminants 

Goden millet is a relatively high yielding quality forage for ruminants. 

see (Hacker et al., 1969)

Steers

In Kenya, cattle grazing unfertilized Nandi cv. were reported to gain 336 kg/ha/year (Skerman et al., 1990). In Queensland (Australia), steers continuously grazing golden millet fertilised with 330 kg/ha N, and stocked at about 3 steers per hectare, could produce liveweight gains of 500-800 kg/ha per year (Cook et al., 2005).

In subtropical Australia, well-fertilized setaria pastures sustained continuous stocking rates of up to 6 steers per hectare (Hacker, 1992).

Similar stocking rates could be anticipated in tropical regions without a pronounced dry/cool season.

Animal production

In Kenya, live-weight gains from three pasture species over a three-year trial, without nitrogen fertilizer and without a legume, respectively, were 336 and 192 kg/ha from Nandi setaria, 369 and 220 kg/ha from Nzoia Rhodes grass, and 369 and 131 kg/ha from molasses grass. Hereford steers continuously grazing Nandi setaria and Samford Rhodes grass, fertilized with 330 kg N/ha each at Samford, Queensland, and stocked at 2.5 and 4 steers per hectare, gained a mean of 575 and 522 kg/ha per year on Nandi setaria and 535 kg/ha on the Samford Rhodes grass. In the first two years the animals on Nandi setaria gained significantly more weight at the higher stocking rate than did those on Rhodes grass (Hacker & Jones, 1969) (FAO, 2017).

Breeding livestock

In New zealand, the introduction of 10% or 30%  farm area in setaria reduced total pasture supply slightly during winter and spring, but doubled (10%) and nearly tripled (30%) summer supply. Staocking rates could subsequently be increased by 22% and 25% for the 10% and 30% setaria scenarios respectively. Golden millet was recommended to sustain breeding stock liveweights during periods of scarcity (dry periods). It was particularly effective for breeding cows as breeding ewes could not control stem growth of golden millet (Boom et al., 1996).

Rabbits 

Green Setaria sphacelata is used as cut-and-carry forage by rabbit farmers in different countries such as Indonesia (Prawirodigdo 1985), Uganda (Lukefahr, 1998) or Eritrea (Tesfay et al., 2014). Nevertheless, used as only feed, this graminaceous forage failed completely to support rabbit's maintenance (Raharjo et al., 1986).

Young forage (8 weeks) has a relatively high content of proteins of about 14-16% DM (Lebas, 2007) and is relished by rabbits (Ghosh et al., 2009). On the contrary older forage (more than 15-20 weeks) has a very low proteins content (6-7%) and these proteins are poorly digested by the rabbits : 6.2% of N digestibility; in addition, the measured digestible energy content of this type of forage is also very low : 1.7MJ/kg DM (Raharjo et al., 1986). This type of "old" forage is not appreciated by rabbit in cafeteria free choice tests or if distributed alone (Raharjo, 1987).

However, included at 25% in a balanced diet, dried S. sphacelata induced intake or digestibility performance similar to those obtained with other forages such as Panicum maximum cv hamil or Thysanolaena maxima.

From a practical point of view, fresh young Setaria sphacelata may be recommended as forage for familial small units and when cut older, dried S. spacelata may be included in rabbit balanced diets up to 20-25%, but exclusively as source of fibre, like a cereal straw.

Nutritional tables
Tables of chemical composition and nutritional value 

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

IMPORTANT INFORMATION: This datasheet is pending revision and updating; its contents are currently derived from FAO's Animal Feed Resources Information System (1991-2002) and from Bo Göhl's Tropical Feeds (1976-1982).

Main analysis Unit Avg SD Min Max Nb
Dry matter % as fed 22.8 6.3 14.2 39.9 218
Crude protein % DM 7.2 2.6 3.7 14.6 270
Crude fibre % DM 38.3 3.6 30.4 44.5 256
NDF % DM 73.3 3.3 63.0 75.9 21 *
ADF % DM 44.5 4.2 32.6 46.2 18 *
Lignin % DM 6.4 1.6 2.6 7.4 12 *
Ether extract % DM 2.0 0.6 1.1 3.6 241
Ash % DM 10.0 2.4 5.8 14.9 265
Gross energy MJ/kg DM 18.0 18.0 19.9 2 *
 
Minerals Unit Avg SD Min Max Nb
Calcium g/kg DM 2.9 0.9 1.2 5.0 244
Phosphorus g/kg DM 2.3 0.7 1.1 4.0 243
Potassium g/kg DM 26.1 10.0 10.4 47.0 226
Sodium g/kg DM 1.4 1.4 0.2 4.3 10
Magnesium g/kg DM 2.0 0.6 1.1 3.4 221
Manganese mg/kg DM 172 58 83 263 11
Zinc mg/kg DM 27 11 12 41 11
Copper mg/kg DM 7 2 5 10 11
 
Ruminant nutritive values Unit Avg SD Min Max Nb
OM digestibility, Ruminant % 58.5 3.9 58.5 74.6 7 *
Energy digestibility, ruminants % 55.9 55.9 67.4 2 *
DE ruminants MJ/kg DM 10.1 10.1 13.4 2 *
ME ruminants MJ/kg DM 8.1 *
Nitrogen digestibility, ruminants % 67.5 13.7 44.1 77.4 7

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

References

Aumont et al., 1991; Butterworth, 1963; CIRAD, 1991; Gerdes et al., 2000; Kabuga et al., 1993; Mlay et al., 2006; Nasrullah et al., 2003; Pozy et al., 1996; Scaut, 1959; Sen et al., 1965; Singh et al., 1992; Van Rensburg, 1956; Van Wyk et al., 1951; Yadav et al., 1991

Last updated on 24/10/2012 00:44:15

References
References 
Datasheet citation 

DATASHEET UNDER CONSTRUCTION. DO NOT QUOTE. http://www.feedipedia.org/node/381 Last updated on May 19, 2017, 14:19