Centrosema pubescens Benth.
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Centrosema pubescens, common name centro or butterfly pea, is a legume in the family Fabaceae, subfamily Faboideae, and tribe Phaseolae. It is native to Central and South America and cultivated in other tropical areas as a forage for livestock.[3][4]
Contents
Description[edit]
Centro is a perennial herb that can reach a height of 45 cm (18 inches). The root system can reach up to 30 cm in depth, frequently in association with Rhizobium, nitrogen-fixing bacteria.[4] Stems grow and branch rapidly, producing a dense mass of branches and leaves on the soil. Stems do not become woody until about 18 months after planting. Leaves are trifoliate, with elliptical leaflets approximately 4 × 3.5 cm (1.6 × 1.4 inches), dark-green and glabrous above but whitish and densely tomentose below. Flowers are generally pale violet with darker violet veins, born in axillary racemes. Fruit is a flat, long, dark brown pod 7.5–15 cm (3–6 inches) long, containing up to 20 seeds. Seeds are spherical, about 4–mm (0.16–inches) in diameter, dark brown when ripe.
Uses[edit]
Centrosema pubescens is widely used as forage and a source of protein to grazing cattle from southern Mexico to Colombia.[5] In the nineteenth century it was cropped in Indonesia and the Malay Peninsula. It is well adapted to tropical conditions and altitudes below 600 m from sea level.[6]
Centrosema pubescens is grown as a cover crop because it naturally suppresses weeds and is very tolerant to drought. Centro is unable to tolerate cold temperatures, but has very low soil and rainfall requirements. This plant is not suitable for human consumption but provides benefits through soil fertility and animal health.
This plant can be cultivated in regions with rainfall ranging from 1000 mm to 1750 mm per year. However, it has a reasonable drought tolerance thanks to its deep root system, so it can take up water from a significant depth. It grows well in nutrient-poor soils.
Centrosema pubescens can be intercropped with grasses, thus increasing the protein of the cattle diet. [6] The leaves can also be used as a cheap source of protein for broiler chickens. It is a good source of calcium and potassium for animals.
Recent production figures for several countries:[7][8]
- Brazil : 40 tonnes on average per year
- Uganda: 220–275 kg/hectare, 1250 seeds per m2
- Queensland: Dry- 12.8 tonnes per hectare per year
- Animal Feed- 550–650 kg per hectare per year
- Colombia: 7.6 tonnes per hectare per year
Growing conditions[edit]
Centro is propagated by seed, planted directly into the ground or broadcast over a field typically before the rainy season.[7][9] Centro grows well in soils without fertilizer since it is very adaptable to its environment.[7] For optimal yields it is best to grow centro in wet and humid soils, but it can grow in any soil type from a sandy to clay soil depending on its location.[7] Centro grows best in a soil pH between 4.9–5.5, but will still survive in soils with a pH as low as 4.[7] This plant is also able to endure soils with a high level of manganese.[7]
The growing season for centro ranges between 4–8 months, but the seeds typically mature within 4–6 months. Centro has versatile rainfall requirements, with its optimal range between 1500–1700 mm, but can still grow with a minimum of 800 mm and is able to withstand 3–4 month dry periods.[9]
A potential disadvantage is that centro ripens unevenly, which makes it hard to harvest mechanically, and it is therefore mostly harvested by hand.[7]Centrosema pubescens is a short day plant, that is, the plant needs short days to flower.
Centrosema pubescens yields better at pH levels between 6.1 and 6.4 and it grows better in sandy loam soils.[10]Nodulation and nitrogen fixation are also highly correlated with soil pH. It performs better on acidic soils than alkaline soils.[10]C. pubescens does not need nitrogen fertilizer because it is supplied through the nodules. It nodulates easily from native Rhizobium available in the local soil, but the culture CB1103 in Australia has show to be very successful in increasing forage yields.[6] It also has the capability of transferring nitrogen into the soil, increasing the nitrogen inputs every year. It can input up to 46 kg per hectare of nitrogen and transfer up to 3.9 kg per hectare of nitrogen to grasses when it is intercropped.[11]
During planting the seed rate is 4–6 kg per hectare when the seed is broadcast or 1 to 2 kg of seed per hectare when intercropped with grasses.
Cultivation[edit]
Seeds of Centrosema pubescens have a mechanical dormancy that has to be broken by soaking the seeds for 3–5 minutes in water at 85 °C.[12] After the seeds have passed the dormancy breaking treatment, they can be inoculated with Rhizobium and planted with a no-till planter. A typical seed planting depth is 2.5–5 cm. The shallower depth is used when the soil moisture is appropriate, but when the soil is dry the seed should be planted deeper to reach moisture.[6]
Centrosema pubescens is a promising forage in regions looking for an alternative to enhance the protein content of livestock feed. It is easy to manage and improves soil nitrogen levels. It does not require any special technology or equipment to plant.
Stress tolerance[edit]
Centro will produce optimal yields in fertile soils containing calcium, phosphorus, molybdenum, potassium and copper; but will still give yields if the soil is lacking in these nutrients.[7] In poor nutrient soils its seeds respond best to any amount of phosphorus, molybdenum and magnesium that exists.[7] Centro is highly drought tolerant because of its deep root system, making it capable of using groundwater if no other water is available.[7] In the case of drought, the plant adapts by dropping its leaves.[9] Centro is also very capable of enduring waterlogging, flooding and shade while still yielding up to 80% of its optimal amount.[9]
Centrosema pubescens yield is not affected by acid or very high aluminum soils with low phosphorus. However it can increase yields of forage when the soil pH is elevated to 6 and after addition of 30–60 kg per hectare of phosphorus.
Weeds, pests and diseases[edit]
Since this plant is vigorously twining it naturally suppresses weeds by creating a dense ground cover and is fairly good at spreading naturally to cover a large surface area.[7] The combination of grass and centro is more suppressive of weeds than any other grass and legume combination.[9]
Insects are the biggest problem for centro plants. Pests include meloidae beetles, thrips, red spiders, bean flies and caterpillars.[9] Centro is mostly unaffected by diseases, and tends not to have any major attacks [6]. Fungal diseases that have previously affected centro include leaf spot, anthracnose and rhizoctonia blight and wilt.[13] Simple solutions to prevent these pests and pathogens are slashing, and spot treatments with herbicides.[7]
Genetic stocks[edit]
There are 3 distinct germplasm origins that all differ in their characteristics, none of which have been recorded to facilitate further scientific research done to improve the species.[8]
Harvest and storage[edit]
Seed harvest is usually performed by hand. Mechanical harvesting is difficult due to the plant architecture. When the plants are ripening, they are collected and spread to dry in the sun until they are ready to be threshed.[6]
After the seeds are removed from their pods, they are typically cleaned in hot water or with a chemical to eliminate any pathogens that may be present.[7] Storage of this seed should be dry and free from humidity because wet environments give rise to pests and pathogens and promote their growth.
Nutritional value for animal feed[edit]
C. pubescens is a good source of protein, calcium and potassium for cattle as forage. It can be used to feed broiler chickens and broiler finishers as leaf meal in a quantity up to 20 g per day. More than that causes reduction in growth performance. This is a very cheap alternative to other sources of protein the are usually more expensive, like soybean.[14]
| Fraction | C. pubescens leaf meal |
|---|---|
| Dry matter | 88.99 |
| Crude protein | 23.24 |
| Crude fibre | 8.80 |
| Ether extract | 3.32 |
| Ash | 9.14 |
| Nitrogen free extract | 55.50 |
| Calcium | 1.22 |
| Potassium | 1.85 |
| Phosphorus | 0.54 |
| Magnesium | 0.30 |
| Sodium | 0.17 |
| Zinc (mg/kg DM) | 40.01 |
| Iron (mg/kg DM) | 20.01 |
| Oxalate (g/100g DM) | 0.037 |
| Phytate (g/100g DM) | 0.48 |
| Tannin (g/100g DM) | 2.81 |
| Gross energy (kcal/kg) | 4354 |
Source Nworgu & Egbunike, 2013.[14]
Plant nutrition[edit]
The plant has fairly high calcium content in the leaves, so addition of calcium can be important. Liming is a good practice to enhance soil pH and supply calcium to the plant that will increase the calcium content in the leaves. C. pubescens is a tropical forage, so it requires very low phosphorus, but it responds to phosphate fertilization. Leaves should be a minimum of 0.16% phosphorus at flower formation.[6] The ideal available P in the soil for a good yield is between 2–5 mg of phosphorus per kg of soil and 12.4 mg per kg of soil of potash.[11]C. pubescens has can produce up to 4950 kg per hectare of dry matter.[6]
References[edit]
- ^ Tropicos
- ^ The Plant List
- ^ Bentham, George. Commentationes de Leguminosarum Generibus 55. 1837.
- ^ a b Souza, A.C.B; Carvalho, Ramos, Campos, Sforça, Zucchi, Jank,Souza (2011). "Genetic studies in Centrosema pubescens Benth, a tropical forage legume: the mating system, genetic variability and genetic relationships between Centrosemaspecies". Euphytica 181: 223–235. doi:10.1007/s10681-011-0415-0.
- ^ "Centrosema pubescens Benth". USDA. Retrieved November 2013.
- ^ a b c d e f g "Centrosema pubescens Benth". FAO.
- ^ a b c d e f g h i j k l m Food and Agricultural Organization of the United Nations. “Centrosema pubescens Benth”. Rome, 2013. FAO. November 3, 2013.
- ^ a b Tropical Forages. “Centrosema pubescens”, Colombia, 2005. Mr. Bruce Cook, Dr. Bruce Pengelly, Mr Stuart Brown, Mr. John Donnelly, Mr. David Eagles, Mr. Arturo Franco, Dr. Jean Hanson, Dr. Brendan Mullen, Mr. Ian Partridge, Dr. Michael Peters, Dr. Prof. Rainer Schultze-Kraft. November 3, 2013.
- ^ a b c d e f Feedipedia- Animal Feed Resources Information System. “Centro. Centrosema molle”, 2012. Heuze.V, Tran.G. November 3, 2013.
- ^ a b Odu; Fayemi, Ogunwale (1970). "Effect of pH on the growth, nodulation and nitrogen fixation of Centrosema pubescens and Stylosanthes gracilis". Journal of the Science of Food and Agriculture 22: 57–59. doi:10.1002/jsfa.2740220203.
- ^ a b Costa, N.L.; Bendahan, Gialuppi, Ribeiro, Braga (2009). "Centrosema macrocarpum: caracteristicas agronomicas, produtividade e manejo.". Embrapa Comunicado tecnico (26).
- ^ Costa, N. L.; Bendahan, Gialuppi, Ribeiro, Braga (2009). "Centrosema macrocarpum: caracteristicas agronomicas, produtividade e manejo.". Embrapa Comunicado tecnico (26).
- ^ Pastures Australia: Pasture Picker. “Centro”, Queensland Australia, 2008. Kendrick Cox. November 3, 2013
- ^ a b Nworgu, F.C.; Egbunike, (2013). "Nutritional potential of Centrosema pubescens, Mimosa invisa and Pueraria phaseoloides leaf meals on growth performance responses of broiler chickens". American Journal of Experimental Agriculture 3 (3): 506–519.
| License | http://creativecommons.org/licenses/by-sa/3.0/ |
| Rights holder/Author | Wikipedia |
| Source | http://en.wikipedia.org/w/index.php?title=Centrosema_pubescens&oldid=644987096 |
Perennial twining herb, sometimes forming mats. Leaves 3-foliolate. Leaflets up to 6.5 cm long, elliptic or oblong-lanceolate, more or less velvety on both surfaces; petiole 1-5.5 cm long. Inflorescences several-flowered, axillary; peduncle 2.5-5.5 cm long. Standard up to 4 × 3.5 cm, mauve-purple with a white or yellowish central band, often flanked by darker purple lines, pubescent outside, with a short spur outside just above the claw. Pod linear, 5-17 cm long with 2 raised ribs along the edges of the valves, velvety when young, becoming hairless.
pubescens: velvety, pubescent, with soft short hairs
"Notes: Western Ghats & Eastern Ghats, Cultivated, Native of Tropical America"
Native in tropical America; widely cultivated in the Old World and sometimes naturalised
Distribución: De áreas disturbadas, tales como en cultivos abandonados, pastizales o a lo largo de carreteras, de elevaciones medias y bajas. Especie nativa de América tropical, introducida en Asia y África.
Bosques Públicos: Maricao, Río Abajo, Susúa y Vega.
Distribution: In disturbed areas, such as abandoned fields, pastures, or roadsides, at middle and lower elevations. Native to tropical America, introduced in Asia and Africa.
Public Forests: Maricao, Río Abajo, and Susúa.
"Karnataka: Coorg Kerala: All districts Tamil Nadu: Dindigul, Kanniyakumari, Salem, Theni, Tirunelveli, Virudhunagar"
Perennial, Herbs, Vines, twining, climbing, Taproot present, Nodules present, Stems prostrate, trailing, or mat forming, Stems 1-2 m tall, Stems greater than 2 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules persistent, Stipules free, Leaves compound, Leaves pinnately 3-foliolate, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Stipels present at base of leaflets, Leaflets 3, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts conspicuously present, Bracteoles present, Flowers zygomorphic, Flowers resupinate, banner in inverted or lateral position, Calyx 4-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals white, Petals ochroleucous, cream colored, Petals orange or yellow, Petals blue, lavander to purple, or violet, Petals bicolored or with red, purple or yellow streaks or spots, Banner petal ovoid or obovate, Banner petal auriculate, Banner petal spurred, Wing petals narrow, oblanceolate to oblong, Wing petals auriculate, Keel petals auriculate, spurred, or gibbous, Kee l abruptly curved, or spirally coiled, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruits winged, carinate, or samaroid, Fruit exserted from calyx, Fruit internally septate between the seeds, Fruit beaked, Fruit glabrous or glabrate, Fruit 3-10 seeded, Fruit 11-many seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black, Seeds with appendage - aril, caruncle, funiculus, or strophiole.
| License | http://creativecommons.org/licenses/by-nc-sa/3.0/ |
| Rights holder/Author | Compiled from several sources by Dr. David Bogler, Missouri Botanical Garden in collaboration with the USDA NRCS NPDC |
| Source | http://plants.usda.gov/java/profile?symbol=CEPU5 |
Centrosema pubescens Benth.
SINÓNIMO: Bradburya pubescens (Benth.) Kuntze
Bejuco poco leñoso, voluble, que alcanza 8 m de largo. Tallos verdosos, cilíndricos, delgados, adpreso-pubescentes. Hojas alternas, trifolioladas; folíolos ovados, oblongos o elípticos, 3-8 × 1.6-4.5 cm, el ápice agudo u obtuso, la base redondeada u obtusa, los márgenes enteros, ambas caras glabras a pubescentes; haz con la nervación hundida; envés con la nervación prominente; peciolulos engrosados, pubescentes; pecíolos sulcados, sub-cuadrangulares, 2-5 cm de largo, puberulentos; estipelas subuladas, 2-2.5 mm de largo; estípulas ovadas, 2-4 mm de largo. Flores solitarias o de a pares en el extremo de pedúnculos axilares bracteados, 5-10 cm de largo; bractéolas oblongas poco más largas que el cáliz. Cáliz verde, asimétricamente campanulado, la porción tubular 5-7 mm de largo, con cinco lóbulos muy desiguales, los laterales deltados, ca. 1 mm de largo, los centrales subulados o lineares, 5-7 mm de largo; corola violeta pálido, lavanda o con menos frecuencia amarillenta o blancuzca con líneas púrpuras, el estandarte 2-4.5 cm de ancho, abaxialmente aterciopelado, las alas y la quilla más cortas que el estandarte. Legumbre linear, 10-20 × 0.4-0.6 cm, el ápice acuminado, con los márgenes acostillados, dehiscentes mediante valvas que se enroscan al secarse; semillas 8-15 por fruto, oblongo-cuadrangulares, marrón obscuro, opacas, 5-6 mm de largo.
Fenología: Florece predominantemente durante los meses de noviembre a diciembre pero puede encontrarse en flor desde septiembre hasta marzo.
Estatus: Nativa, muy común.
Especimenes Estudiados: Acevedo-Rdgz., P. 256; 1054; 6985; 9452; Axelrod, F. 10817; Britton, N.L. 2823; 6735; 7317; Heller, A.A. 210; 6084; Sargent, F.H. 122; Sintenis, P. 3080; 5588; Wetmore 175.