Investigations preliminary to the production of cultivars of Andropogon gayanus

Euphytica ◽  
1962 ◽  
Vol 11 (1) ◽  
pp. 47-52 ◽  
Author(s):  
W. H. Foster
Keyword(s):  
Andropogon Gayanus

scholarly journals Nutrição mineral de Andropogon gayanus Kunth var. bisquamulatus (Hochst) Hack. III. nível critico de fósforo

1982 ◽  
Vol 39 (1) ◽  
pp. 77-87
Author(s):  
A.P. Orellana ◽  
H.P. Haag
Keyword(s):  
Andropogon Gayanus ◽  
De Se

0 capim gambá (Andropogon gayanus Kunthe var. bisquamulatus) é uma espécie promissora para a pecuária brasileira. 0 presente trabalho foi conduzido no sentido de se determinar o nível crítico de fósforo. Em casa de vegetação, procedeu-se à semeadura em vasos contendo quartzo finalmente moído como substrato. As plântulas recebiam por percolação soluções nutritivas carentes em fósforo, acrescidas dos seguintes níveis de fósforo em mg/l: 0,0001; 0,001; 0,007; 0,030; 0,120; 0,480; 1,940; 7,750 e 31,80. Com a idade de 75 dias, as plantas foram coletadas, secas e analisadas para fósforo total. O nível crítico de fósforo correspondente à produção máxima de matéria seca aos 75 dias foi de 0,022%,e o nível externo foi de 0,480 mg de fósforo por litro de solução nutritiva.

scholarly journals Partição da energia e produção de metano em ovinos alimentados com feno de Andropogon Gayanus colhido em três diferentes idades

2019 ◽  
Vol 118 (1) ◽  
pp. 102-113
Author(s):  
André Cayô Cavalcanti ◽  
Eloísa De Oliveira Simões Saliba ◽  
Cristovão Colombo De Carvalho Couto Filho ◽  
Filipe Aguiar Silva ◽  
Cecília Da Mota Ribeiro e Silva ◽  
...  
Keyword(s):  
Andropogon Gayanus

Foi realizado estudo para descrever a partição da energia e produção de metano por ovinos alimentados com fenos do capim Andropogon gayanus colhidos aos 56, 84 e 112 dias de crescimento. Utilizou-se a metodologia da calorimetria indireta para mensuração das perdas de energia e para a determinação da energia digestível (ED), metabolizável (EM) e líquida (EL). O delineamento experimental foi inteiramente casualizado, sendo constituído de três tratamentos e seis repetições. As médias foram comparadas pelo teste Studant-Newman-Keuls (SNK) ao nível de 5% de significância. O feno, cujo material foi colhido aos 56 dias, resultou em maior (P<0,05) consumo de energia digestível (CED) em relação aos materiais fenados com 84 e 112 dias de rebrote. As perdas diárias de energia através da urina, do metano e do incremento calórico não apresentaram diferença (P>0,05) entre os tratamentos. O feno contendo material colhido aos 56 dias apresentou valor de digestibilidade aparente da energia bruta (DAEB) superior (P<0,5) aos demais tratamentos que não diferiram (P>0,05) entre si. O feno colhido as 56 dias apresentou maior valor de energia digestível e energia metabolizavél em relação aos demais fenos que não diferiram entre si (P>0,05). A produção de metano não variou (P>0,05) entre os tratamentos estudados.

scholarly journals Influence of soluble content losses on the ability of aerobic fungi to improve the nutritional content of pre-treated forages

2020 ◽  
Vol 47 (3) ◽  
pp. 298-308
Author(s):  
K. R. Idowu ◽  
A. S. Chaudhry ◽  
J. Dolfing ◽  
V. O. A. Ojo
Keyword(s):  
Secondary Metabolites ◽  
Growth Conditions ◽  
Water Soluble ◽  
Optimal Conditions ◽  
Similar Reduction ◽  
Filtering Method ◽  
Nutritive Quality ◽  
Andropogon Gayanus ◽  
The Impact

Fungal improvement of the nutritive content of low-quality forages can be affected by several factors among which loss of water-soluble content (WSC) plays a major role. To achieve this aim, two growth conditions i.e. forage-liquid ratios (1:3 and 1:5) and two inoculation times (14 and 28 days) were used to cultivate the selected fungi i.e. Pleurotus ostreatus (PO) at 30°C and Ceriporiopsis rivulosus (CR) at 20°C on Brachiaria decumbens (BD), Andropogon gayanus (AG), Triticum aestivum (TA) straw, Lolium perenne (LP), respectively with the view of selecting the optimal conditions that facilitate the release of WSC. The impact that losses of WSC have on the ability of fungi to improve the nutritive content (i.e. proximate, fibre, secondary metabolites and total antioxidant content) of the forages were then measured using 2 filtering methods i.e. light pump filtering method (LFM) and free flow filtering method (FFM). The optimal conditions that supported increased th soluble was identified as 28th day for both fungi; forage-liquid ratio of 1:5 for both fungi in most of the forages except BD (CR) and BD & AG (PO). The LFM led to lesser or no improvement in the nutritive quality of the upgraded forages while the opposite was recorded with the LFM. The LFM as against the FFM produced upgraded forages with lesser reduction in NDF; similar or higher ADF and lignin contents; and similar reduction in secondary metabolites and TAC when compared with un-improved forages. It can be concluded that the fungal improvement of the nutritive content of low-quality forages was negatively affected by the loss of WSC. It is therefore recommended that fungal improvement of the nutritive quality of low quality forages should be carried out with methods or techniques that facilitates little or no WSC loss in the upgraded forages.

scholarly journals POTENSI PEMANFAATAN LAHAN BEKAS TAMBANG YANG DITANAMI RUMPUT GAMBA (Andropogon gayanus) SEBAGAI AREAL PETERNAKAN

Pastura ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 113
Author(s):  
E. W. Saragih ◽  
S. Bellairs
Keyword(s):  
Waste Rock ◽  
Tailing Dump ◽  
Andropogon Gayanus ◽  
Waste Rock Dump

Rumput gamba (Andropogon gayanus) merupakan salah satu tanaman makanan ternak yang memiliki produksi dan palatabilitas yang tinggi. Rumput ini juga dimanfaatkan sebagai tanaman untuk revegetasi di lahan bekas tambang di daerah selatan Australia. Penanaman rumput gamba di lahan bekas tambang atas anjuran peternak karena dianggap rumput ini pakan hijauan yang disukai ternak dengan produksi tinggi. Hal ini juga sesuai tujuan pemanfaatan akhir lahan bekas tambang setelah rehabilitasi yaitu sebagai areal peternakan. Tujuan dari penelitian ini adalah untuk mengetahui potensi pemanfaatan lahan bekas tambang yang ditanami rumput sebagai areal peternakan. Metode penelitian dilakukan dengan cara survei lapangan, Perhitungan produksi hijauan kering didasarkan pada produksi hijauan segar per meter bujursangkar. Pengambilan sampel dilakukan pada areal waste rock dump dan tailing dump pada lahan bekas tambang dan padang penggembalaan alami di dekat lahan bekas tambang. Perhitungan kapasitas tampung areal lahan bekas tambang didasarkan pada rumus. Hasil penelitian ini menunjukkan bahwa rumput gamba dapat tumbuh dengan baik di lahan bekas tambang dengan persentase penutupan tanah berkisar antara 20-60%. Hal ini menunjukkan pemanfaatan rumput gamba sebagai penutup tanah pada areal lahan bekas tambang cukup efektif. Produksi bahan kering rumput gamba di lahan bekas tambang enam kali lebih tinggi (2465,30 ± 414,51 kg/ha) dibandingkan dengan dengan areal padang penggembalaan alami (425,46 ± 202,56 kg/ha). Kapasitas tampung di lahan bekas tambang juga jauh lebih tinggi (0,5-4 UT/ha) daripada pada padang penggembalaan alami (0,06-1 UT/ha). Tingginya produksi hijauan dan kapasitas tampung menunjukkan bahwa pemanfaatan lahan bekas tambang yang ditanami rumput gamba cukup potensial untuk pengembangan ternak ruminansia. Kata kunci: tambang, gamba, rumput, kapasitas tampung, penutupan tanah

scholarly journals Ingestive Behavior of Cows in Pastures Andropogon gayanus and Brachiaria decumbens in Southern State of Piauí, Brazil

2014 ◽  
Vol 6 (4) ◽  
pp. 144 ◽  
Author(s):  
Wéverton José Lima Fonseca ◽  
Wéverson Lima Fonseca ◽  
Paulo Henrique Amaral Araújo de Sousa ◽  
Leandro De Oliveira Guerra ◽  
Carlos Syllas Monteiro Luz ◽  
...  
Keyword(s):  
Experimental Design ◽  
Idle Time ◽  
Ingestive Behavior ◽  
Brachiaria Decumbens ◽  
Southern State ◽  
Late Afternoon ◽  
Crossbred Cows ◽  
Agricultural College ◽  
Andropogon Gayanus

The research was conducted at the experimental farm of the Agricultural College of Bom Jesus, which is located at 135 km 3 BR, in the region of the valley Gurguéia southern state of Piauí. We used 10 crossbred cows of Holstein x Gir. The experimental design was completely randomized with two treatments (the pastures of grasses Andropogon gayanus and Brachiaria decumbens), with five replicates (five animals per treatment). The trial lasted five days. Two evaluations were made with duration of 24 hours each, conducted during a day, and the average of the two ratings was used in the statistical analyzes. The evaluations were performed on 20 to 24 July 2013. The cows grazed more time in the morning around 7-10 hours and late afternoon extending into the night with peak until 19:00 hours. The idle time was greater at the end of the night that matches the period of reduced grazing activity. The cows grazed more time during the day in the pasture of Brachiaria decumbens (8.53 hours) compared to pasture Andropogon gayanus (8.03 hours). With respect to time grazing night, the situation was reversed, the animals grazed longer during the day and slowed down during the night (3.16 hours grazing) in the pasture of Brachiaria decumbens. The animals had a higher number of bits (14128.92) in grazing Brachiaria decumbens compared to Andropogon gayanus (10134.00).

scholarly journals Dry Matter Production, Nutrient Cycled and Removed, and Soil Fertility Changes in Yam-Based Cropping Systems with Herbaceous Legumes in the Guinea-Sudan Zone of Benin

Scientifica ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-12
Author(s):  
Raphiou Maliki ◽  
Brice Sinsin ◽  
Anne Floquet ◽  
Denis Cornet ◽  
Eric Malezieux ◽  
...  
Keyword(s):  
Soil Fertility ◽  
Dry Matter ◽  
Cropping Systems ◽  
Block Design ◽  
Chemical Properties ◽  
Mucuna Pruriens ◽  
Total N ◽  
Herbaceous Legumes ◽  
Andropogon Gayanus ◽  
The Impact

Traditional yam-based cropping systems (shifting cultivation, slash-and-burn, and short fallow) often result in deforestation and soil nutrient depletion. The objective of this study was to determine the impact of yam-based systems with herbaceous legumes on dry matter (DM) production (tubers, shoots), nutrients removed and recycled, and the soil fertility changes. We compared smallholders’ traditional systems (1-year fallow ofAndropogon gayanus-yam rotation, maize-yam rotation) with yam-based systems integrated herbaceous legumes (Aeschynomene histrix/maize intercropping-yam rotation,Mucuna pruriens/maize intercropping-yam rotation). The experiment was conducted during the 2002 and 2004 cropping seasons with 32 farmers, eight in each site. For each of them, a randomized complete block design with four treatments and four replicates was carried out using a partial nested model with five factors: Year, Replicate, Farmer, Site, and Treatment. Analysis of variance (ANOVA) using the general linear model (GLM) procedure was applied to the dry matter (DM) production (tubers, shoots), nutrient contribution to the systems, and soil properties at depths 0–10 and 10–20 cm. DM removed and recycled, total N, P, and K recycled or removed, and soil chemical properties (SOM, N, P, K, and pH water) were significantly improved on yam-based systems with legumes in comparison with traditional systems.

The extent of Mission grasses and Gamba Grass in the Darwin region of Australia's Northern Territory

2002 ◽  
Vol 8 (4) ◽  
pp. 281 ◽  
Author(s):  
Louise Kean ◽  
Owen Price
Keyword(s):  
Land Tenure ◽  
Hot Spots ◽  
Northern Australia ◽  
Weed Species ◽  
Small Areas ◽  
Major Threat ◽  
Potential Habitat ◽  
Potential Source ◽  
Andropogon Gayanus ◽  
Prompt Action

Mission grasses Pennisetum polystachion (L.) Schult. and P. pedicellatum (Trin) and Gamba Grass Andropogon gayanus (Kunth) are three weed species that are thought to be spreading rapidly in the vicinity of Darwin and may pose a major threat to ecosystems in northern Australia. The distribution of the species was assessed from a vehicle along 913 km of roads near Darwin. The study provided data on the potential source of further spread and an analysis of the potential habitat of the weeds. For analysis, roadsides were divided up into 200 m cells and the distributions of the grasses were compared against land tenure and broad land unit maps, Mission grasses were present in approximately 52% of cells, and were particularly common around the rural residential/horticultural area of Humpty Doo. They occurred equally commonly in all broad land units, but differed among tenures, being particularly common on freehold land. Gamba Grass occurred in 15% of cells, with hot spots in a number of areas. It was most common on freehold land, and was rare on conservation reserves. It also showed an association with broad land units reflecting wetter areas. Mission grasses are so widespread in the Darwin region that control can only be contemplated in very small areas requiring frequent treatment of re-invading plants. It may be possible to control Gamba Grass in conservation reserves and Crown land if prompt action is taken. For all three species, preventing their spread to new areas should be a high priority.

9.8 The Role of Forbs and Shrubs in the Nitrogen Intake of Grazing Livestock in the Accra Plains

1982 ◽  
Vol 6 ◽  
pp. 189-191
Author(s):  
F. K. Fianu
Keyword(s):  
Rainy Season ◽  
Ecological Status ◽  
Panicum Maximum ◽  
Andropogon Gayanus ◽  
Nitrogen Intake ◽  
Almost All ◽  
Free Ranging ◽  
Grazing Livestock ◽  
Accra Plains

Free ranging cattle in the Accra Plains of Ghana have an almost all grass diet during the rainy season when lush grass abounds (Fianu, 1966). Depending on the ecological status of the grassland, the prominent species include Andropogon gayanus, Brachiaria falcifera, Panicum maximum, Schizachyrium schweinfurthii and Vetiveria fulvibarbis. On bush fallows, grasses of lower successional status, e.g. Chloris and Digitaria spp., are grazed.At the start of the rainy season (March-April), the young herbage may contain as much as 2.8% N. As the plant matures, however, the N content declines rapidly below critical levels, e.g. 0.95-1.3% at 18 weeks (Fianu and Winch, 1980) and 0.6-0.8% at 38 weeks (Lansbury, Rose Innes and Mabey, 1965).Such mature grass is burnt in the dry season to induce a more nutritious flush but hard grazing and slashing also induce equally nutritious regrowth (Fianu and Winch, 1980).

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