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Articles 391 - 420 of 11974
Full-Text Articles in Physical Sciences and Mathematics
Cell-Wall Polysaccharide Degradability In Divergently Selected Lucerne, Hans-Joachim G. Jung, Richard R. Smith, Craig S. Endres
Cell-Wall Polysaccharide Degradability In Divergently Selected Lucerne, Hans-Joachim G. Jung, Richard R. Smith, Craig S. Endres
IGC Proceedings (1993-2023)
Effect of selection in lucerne (Medicago sativa L.) for in vitro dry matter disappearance (IVDMD) and acid detergent lignin (ADL) concentration on the degradabillty of cell-wall polysaccharide was investigated, Lucerne lines that had been previously bidirectionally selected for herbage ADL concentrations were selected for high and low IVDMD of stem bases. In vitro rumlnal degradability of cell-wall neutral sugars and uronic acids from half-sib progeny of the selected populations was determined on basal stems from two cuttings. Selection resulted in greater degradability of non-cellulosic polysaccharide components from cell walls of low ADL populations than from high ADL populations for …
Comparison Of Digestibility Of Sorghum Silage By Sheep And By Heifers With Special Reference To The Hemicellulose Monosaccharides, Osamu Kawamura, Shigeyuki Tanaka, Takashi Miaki, Kazuo Shinkai
Comparison Of Digestibility Of Sorghum Silage By Sheep And By Heifers With Special Reference To The Hemicellulose Monosaccharides, Osamu Kawamura, Shigeyuki Tanaka, Takashi Miaki, Kazuo Shinkai
IGC Proceedings (1993-2023)
Sorghum (Sorghum bicolor Moench) and corn are the most popular summer forages in south-west Japan. In this experiment, the digestibilities of sorghum silage were determined by adult sheep and by heifers. The digestibilities of all proximate components by heifers were higher than by sheep, Non-structural carbohydrates were almost completely digested by sheep, in contrast to heifers which excreted a portion of the grain undigested. Neutral detergent fibre, acid detergent fibre, hemicellulose, cellulose and lignin digestibilities for heifers were higher than those for sheep. Heifers digested each hemicellulose monosaccharide better than sheep, Sheep and heifers differed by the largest extent …
Effect Of Varying Trace Elements Intakes On Their Concentrations In The Skeleton Of Grazing Sheep, N D. Grace, J Lee
Effect Of Varying Trace Elements Intakes On Their Concentrations In The Skeleton Of Grazing Sheep, N D. Grace, J Lee
IGC Proceedings (1993-2023)
The trace mineral composition of the skeleton was studied in 42 Romney wether lambs, which were divided into 7 treatment groups· and grazed on a ryegrass-white clove. pasture. The trace element intakes were increased by drenching daily with various salt solutions. Treatments were (a) control distilled water (b) 8 mg Cu (c) 580 mg Fe (d) 350 mg Mn (e) 2 mg Mo (f) 0.08 mg Se and (g) 30 mg Zn. Treatments had no significant effect on the mean DM intakes (1.2 kg/day) or live-weight gains (178 g/day). Increasing the Mo, Se and Mn, intakes increased their concentrations in …
Physical Resistance, Structure And Morphology Of Perennial Ryegrass Leaves, T Inoue, I M. Brookes, A. John T.N Barry, W F. Hunt
Physical Resistance, Structure And Morphology Of Perennial Ryegrass Leaves, T Inoue, I M. Brookes, A. John T.N Barry, W F. Hunt
IGC Proceedings (1993-2023)
Sixty plants each of 2 lines of perennial ryegrass (lolium perenne L.) selected for low (LS) or high (HS) leaf shear breaking load were grown in a controlled environment. Transverse sections of 22 plants were taken to measure cross-sectional area (CSA) and proportions of sclerenchyma. LS leaves had significantly (P<0.001) lower lengths (258 v. 316 mm), widths (3.4 v. 4.0 mm), dry weights (32 v, 48 mg) and shear breaking loads (338 v. 574 g/leaO. CSA, estimated from the relationship CSA (mm2) = 0.265 width (mm) -0.239 (r2=0.86), was also significantly (P<0,001) lower for LS (0.68 v. 0.85 mm1), Leaf shear strengths per unit CSA were calculated as 501 (LS) and 690 (HS) g/mm1 (P<0.001). Sclerenchyma formed a significantly (P<0.01) lower proportion of LS than HS leaves (2,9 v. 6.1% of CSA). The cumulative force required to reduce particle sizes to 1 mm can be expressed as an Inde11 of Masticatory Load (IML) IML values were 2.84(LS) and 3.9l(HS) kg/mg DM (P<0,001), suggesting rates of passage from the rumen might be greater for LS leaves.
Effect Of Physical Resistance In Perennial Ryegrass Leaves On Feeding Value For Sheep, T Inoue, I M. Brookes, A. John T.N Barry, W F. Hunt
Effect Of Physical Resistance In Perennial Ryegrass Leaves On Feeding Value For Sheep, T Inoue, I M. Brookes, A. John T.N Barry, W F. Hunt
IGC Proceedings (1993-2023)
No significant differences were observed in dry matter (DM) intakes, rumen retention times or live weight gains of sheep fed lines of perennial ryegrass (Lolium perenne L,)selected for low (LS) or high (HS) leaf shear breaking load (LSBL). Rates of DM intake were 25% greater, and 18% fewer jaw movements per g DM eaten were required, for test meals of LS compared with HS, but these differences were not significant. The proportion of particles reduced to less than 1 mm during eating and ruminating did not differ significantly. The force required to shear a given dry weight of leaf into …
Improved Nutritive Value Of Different Forage Species Monitored By Near-Infrared Reflectance Spectroscopy, N Berardo, A Tava, L Valdicelli, M Odoardi
Improved Nutritive Value Of Different Forage Species Monitored By Near-Infrared Reflectance Spectroscopy, N Berardo, A Tava, L Valdicelli, M Odoardi
IGC Proceedings (1993-2023)
The development of rapid and reliable methods for the evaluation and prediction of forage quality has been the objective of many researchers for several years. The infrared-reflectance technique was developed for rapid prediction of nutritive value and chemical composition of feedstuffs, and for the last decade has been applied at our institute for the prediction of the nutritive value of forage samples from field trials and breeding programmes. Calibration curves have been developed for alfalfa (Medicago sativa L.), Italian ryegrass (Lolium multiflorum Lam.), cocksfoot (Dactylis glomerata L.), tall fescue (Festuca arundinacea· Schreb.), bromegrass (Bromus …
Chemical And Physical Changes Associated With Maturity Of Barley, Pearl Millet And Berseem Clover, Z Naseer, J P. Fontenot, R L. Grayson, V G. Allen, S M. Chaudhry
Chemical And Physical Changes Associated With Maturity Of Barley, Pearl Millet And Berseem Clover, Z Naseer, J P. Fontenot, R L. Grayson, V G. Allen, S M. Chaudhry
IGC Proceedings (1993-2023)
Experiments were conducted with barley (Hordeum vulgare) and millet (Pennisetum americanum), collected at vegetative, boot, heading and mature growth stages, and berseem clover (Trifollum alexandrium) collected al vegetative, bud and late bloom stages, In the grasses, stems and leaf sheaths were higher (P<0.05) in cell wall constituents, xylose, p-coumaric acid, and ferulic acid and lower (P<0.05) In in vitro dry matter digestibility (IVDMD) than leaf blades. In the legume, stems were higher (P<0,05) in cell wall constituents and xylose than petioles and leaflets, Al advanced maturity, scanning electron microscopy (SEM) showed increased lignification and decreased tissue digestion for leaf sheaths and stems of grasses, compared with leaf blades. In berseem,petioles were higher in IVDMD than leaflets and stems.
Mohair Production And Body-Weight Gains Of Yearling Angora Goats Grazing Forages With Different Tannin Levels, S P. Hart, T Sahlu
Mohair Production And Body-Weight Gains Of Yearling Angora Goats Grazing Forages With Different Tannin Levels, S P. Hart, T Sahlu
IGC Proceedings (1993-2023)
This study evaluated the effects of moderate tannin levels in high quality forages on mohair production and body-weigh! gains of yearling Angora goals, Yearling Angora doelings were grazed on either alfalfa (low tannin level; Medicago sativa L. cv. Cimarron) or sainfoin (moderate tannin level; Onobrychis viciifolia Scop. cv. Renumex). Angora goats were randomly assigned to 2 pastures of each forage, 18 lo each sainfoin pasture and 24 to each alfalfa pasture, Goals grazed 0.15 ha paddocks in each pasture for a week before to being rotated to a new paddock. Doclings grazing sainfoin gained weight faster (62 v. 40 g/day) …
Forage Nutritive Value And Ensilability Of Some Common Grassland Herbs, J Isselstein
Forage Nutritive Value And Ensilability Of Some Common Grassland Herbs, J Isselstein
IGC Proceedings (1993-2023)
Nutritive value for ruminant feeding and ensilability of Achillea millefollum, Plalllago lanceolata and Taraxacum offlcinale in comparison with Lolium perenne and Trifollum repens were investigated, The species were planted as monocultures in a field trial. The influence of the time of first cutting and nitrogen fertilisation was also studied, Laboratory methods were used to estimate the nutritive value and ensilability of the forage. L. perenne had the highest nutritive value, followed by T. repens and T. o.f!lc lnale. A, millefolium and P, lanceolata were of lower quality. The decrease indigestible net energy value from early to late cutting was …
Protein Rather Than Energy Is The Limiting Nutrient For Lactating Cows Fed Large Amounts Of High Quality, T R. Dhiman, L D. Satter
Protein Rather Than Energy Is The Limiting Nutrient For Lactating Cows Fed Large Amounts Of High Quality, T R. Dhiman, L D. Satter
IGC Proceedings (1993-2023)
Two studies were conducted to determine whether protein or energy is first limiting for milk production when cows are fed diets containing large amounts of high quality forage. In the first study, infusion of 1.2 kg/day of soy-protein into the abomasum of cows consuming a diet of all lucerne (Medicago sativa L.) silage increased milk and milk protein production by 13 and 1996. Abomasal infusion of l.0 kg glucose was without effect. In the second study, supplementation of dietary protein resistant to degradation in the rumen to cows fed diets containing 7596 of lucerne silage increased milk production …
Influence Of Maturity On Quality And Agronomic Characteristics Of Energycane, P Mislevy, M B. Adjei, F G. Martin, G M. Prine
Influence Of Maturity On Quality And Agronomic Characteristics Of Energycane, P Mislevy, M B. Adjei, F G. Martin, G M. Prine
IGC Proceedings (1993-2023)
As fossil fuel supplies decline and become cost prohibitive, biomass must be exploited as a renewable energy source, Energy yield from biomass tends to vary among species and different parts of the same plant, The purpose of this research was to determine change in percentage dry matter (DM), DM yield and quality (crude protein (CP), in vitro organic matter digestion (IVOMD)) of green leaves (GL), dead leaves (DL) and stems (S) of L79-1002 energycane (Saccharum spp. L.) harvested at 0.6 m increments from 0.6 to 4,2 m. As plant height at harvest increased from 0.6 to 4.2 m, GL quantity …
Preservation Of Silage Made In Wrapped Round Bales In Reunion Island, Jean-Marie Paillat, Jean Charles Dhuin, Jacques Lepetit, Giles Mandret
Preservation Of Silage Made In Wrapped Round Bales In Reunion Island, Jean-Marie Paillat, Jean Charles Dhuin, Jacques Lepetit, Giles Mandret
IGC Proceedings (1993-2023)
Forage systems development In the highlands of Rwnion Island is based on grass crops. Silage is becoming more important, and roundbale wrapping is increasing. Since 1990, experiments have concerned technical data on different sites (39) and silage composition (168 samples). Descriptive statistics (multivariate analysis) have been used to determine relationships between silage quality and harvesting conditions. Pour synthetic notations have been calculated in relation to silage preservation. As in other studies, silage quality was !iighly related to dry matter (DM) content. Above 33% DM, silage was well preserved, but quality was poor below 20% DM. In different areas, silage preservation …
Growth Analysis And Chemical Composition Of Sulla (Hedysarum Coronarium L.), P A. Pinto, G J. Barradas, P C. Tenreiro
Growth Analysis And Chemical Composition Of Sulla (Hedysarum Coronarium L.), P A. Pinto, G J. Barradas, P C. Tenreiro
IGC Proceedings (1993-2023)
Perennial legumes like sulla (Hedysamm coronarium L.), with interesting autumn-winter growth may be important in Mediterranean agriculture. Sulla produces earlier than other forage crops and reduces annual seed and machinery costs. Also, similarly to annual legumes, it can be introduced into crop rotations with benefits on system diversification and fertility improvement. In order to characterise growth and potential yield, a growth analysis was performed during the first growing season of a sulla crop. Chemical composition through the growing season was also determined, allowing quality evolution analysis. These preliminary results led us to conclude that the sulla crop shows a …
Seasonal Changes In Vitro Digestibility Of Leaf And Pseudostem And Its Implications For Diet Digestibility Of Perennial Ryegrass Continuously Stocked With Sheep, H Clark
IGC Proceedings (1993-2023)
The dry matter digestibility (DMD%) of 3 categories of leaf (youngest expanding leaf, youngest fully expanded leaf, older leaves) and the pseudostem in 3 late heading diploid perennial ryegrass (Lolium perenne L.) cultivars (S23, Melle and Mascot) was estimated on 6 occasions during a single 6-month. grazing season. The cultivars were continuously stocked to maintain a sward height of 4 cm. Information on the DMD% of the plant parts was combined with details of the proportions of leaf and pseudostem consumed by the sheep to obtain an estimate of diet digestibility. Differences between cultivars in the DMD% of plant …
Analysis Of Undried, Unground Forage With A Visible-Near-Infrared Monochromator, J S. Shenk
Analysis Of Undried, Unground Forage With A Visible-Near-Infrared Monochromator, J S. Shenk
IGC Proceedings (1993-2023)
Near-infrared (NIR) instruments are now available that will analyse forage (hay, silage and pasture) for crude protein, fibre constituents and some elements without drying or grinding the sample. The accuracy of this new method of sample analysis is not quite as good as the accuracy of NIR analyses of dried and ground samples. However, given the sampling error associated with obtaining a representative forage sample from a load of hay, silo or pasture, this new method of analysis can provide useful information. In addition, instruments scanning the visible and the near-infrared spectrum can quantify forage colour as well as composition. …
Genotypes Of Dry, Mature Subterranean Clover Differ In Shear Energy, S K. Baker, L Klein, E S. De Boer, D B. Purser
Genotypes Of Dry, Mature Subterranean Clover Differ In Shear Energy, S K. Baker, L Klein, E S. De Boer, D B. Purser
IGC Proceedings (1993-2023)
Variation in voluntary feed intake accounts for about half of the variation in feeding value among forages, and shear or comminution energy is a good predictor of constraint to forage intake. We have developed a technique to determine the energies required to compress and shear green or dead feed material. Among 5 genotypes of subterranean clover (Trifolium subterraneum) there is a negative relationship between the energies required to compress and shear them, and the voluntary feed intake of them by sheep. The two genotypes that were most difficult to shear contained more stem and petiole than the other …
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
Sustainability Of African Farming Systems With Particular Reference To Soil Fertility, Multiple Cropping Systems And Weed Ingress In Smallholder Systems In Humid Tropical Africa, Bede N. Okigbo, Elly N. Sabiti
IGC Proceedings (1993-2023)
Africa continues to face a food and agricultural crisis, the effects of which are sometimes exacerbated by drought and civil strife. The food crisis is the result of the inability of African countries in the humid tropical areas and other zones to produce enough food to satisfy escalating demand, owing largely to rapid population growth and pressures of modernisation. Furthermore, the inability of these countries to earn adequate incomes and the lack of food security, especially in some countries suffering from drought, civil strife or war, has resulted in increasing reliance on food aid to fulfil their food import requirements. …
Sustainability Of Forage-Livestock Production In Smallholder And Plantation Systems, F A. Moog
Sustainability Of Forage-Livestock Production In Smallholder And Plantation Systems, F A. Moog
IGC Proceedings (1993-2023)
Smallholder crop production and plantation systems in south-east Asia provide great opportunities for the expansion of the livestock industry in the region. Weeds and crop residues associated with crop cultivation are utilised efficiently with integration of fodder species in cropping systems. Native vegetation and introduced forage species under plantation support and increase animal production, respectively. Some socioeconomic factors and policies affecting utilisation of grasslands and plantations in relation to smallholder productions are discussed.
Role Of A Three-Strata Forage System In Sustaining Soil Fertility And Arable Crop Production, M Suarna, I M. Nitis, K Lana, W Sukanten, S Putra
Role Of A Three-Strata Forage System In Sustaining Soil Fertility And Arable Crop Production, M Suarna, I M. Nitis, K Lana, W Sukanten, S Putra
IGC Proceedings (1993-2023)
A three-strata forage system (TSFS) experiment was carried out for 5 years to study the role of grass and herbaceous legume (first stratum), shrub legume (second stratum), and fodder trees (third stratum) in sustaining soil fertility and food crop production in a dryland farming area in Bali. The completely randomised design consisted of 2 sloping farming systems (TSFS and traditional system) and 9 replications. Each 0.25 ha TSFS consisted of 0.16 ha core area for food crops, a 0.09 ha peripheral area for Cenchrus ciliaris, Panicum maximum, Stylosanthes guianensis cv. Graham, S. hamata cv. Verano and Centrosema pubescens …
Increasing The Forage Supply And Cattle Production Through A Three-Strata Forage System, K Lana, I M. Nitis, W Sukanten, S Putra, M Suarna
Increasing The Forage Supply And Cattle Production Through A Three-Strata Forage System, K Lana, I M. Nitis, W Sukanten, S Putra, M Suarna
IGC Proceedings (1993-2023)
A three-strata forage system (TSFS) experiment has been can-ied out for 3 years to study the effect of first stratum (grass and ground legume), second stratum (shrub legume) and third stratum (fodder tree) in increasing forage supply and Bali cattle production in a dryland farming area in Bali. The completely randomised factorial design consisted of 2 farming systems (TSFS and traditional system 2) and 2 stocking rates (2 and 4 steers/ha) with 10 and 11 replications. The 0.2S ha TSFS plot was divided into a 0.16 ha core area for food crop, a 0.09 ha peripheral area for the pasture …
Problems And Prospects For Forage Improvement And Utilization In Ghana, W S. Alhassan, P Barnes
Problems And Prospects For Forage Improvement And Utilization In Ghana, W S. Alhassan, P Barnes
IGC Proceedings (1993-2023)
About 70% of the Iota! land area of Ghana is potential grazing land. Mosl ruminant livestock feed is from range, Pasture research in Ghana started in 1938 with the establishment of various native grass and legume collections. These included the grasses Vetiveria fulvilbarbis and Andropogon canalicultaus and the shrubs Griffonia simplicifolia (Leguminosae) and Grewia carpinfolia (Tiliaceae). Considerable success has been made in the introduction and screening of exotic grasses and legumes including Cenchrus ciliaris and various Stylosanthes spp. Very few studies have been conducted on forage utilisation. With the growing awareness of agro-forestry schemes, there are prospects for improved forage …
Factors Restricting The Success Of Pasture Establishment In The Mid-Altitude Zone Of Yunnan Province, South-West China, Li Shuan, Gao Zen Yin, Zhao Wen Hong
Factors Restricting The Success Of Pasture Establishment In The Mid-Altitude Zone Of Yunnan Province, South-West China, Li Shuan, Gao Zen Yin, Zhao Wen Hong
IGC Proceedings (1993-2023)
Factors restricting success of pasture establishment were studied at Lunan Milk Goat Breeding Farm (24°51 'N; 1770 m) from 1989-1990. It was found that establishment was adversely affected by moisture stress, hard bare ground, infertile acid soil, storms, seedharvesting ants, crickets and birds. These factors resulted in physical loss of seed, loss of seed viability, failure of germinated seed to emerge or develop roots and mortality of seedlings, thus causing failure of pasture establishment, Measures to overcome these problems are: appropriate sowing time, good seedbed preparation and sowing technique, recommended fertiliser use and seed treatment with pesticides.
An Investigation In To The Cost Of Pasture Improvement In Yunnan Province, China, Li Shuan, Gao Zen Yun
An Investigation In To The Cost Of Pasture Improvement In Yunnan Province, China, Li Shuan, Gao Zen Yun
IGC Proceedings (1993-2023)
To obtain information to guide our extension work, we investigated the cost of pasture improvement at 6 sites over Yunnan province in 1989. Results show that the costs (yuan/ha) were: 113-290 on seed, 8-326 on land preparation, 100-276 on fertilisation, 240-6350 on fencing and 77-140 on other items. There is no certain relation between the cost and the effect. There were some unreasonable costs on some items at every site. The cost could be more reasonable and the effect could be helter by Improving the scheme taken. This paper sets out the details of cost and effect at the 6 …
Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich
Recent Advances In Pasture Research And Development In Zambia With Special Reference To The Agro-Ecological Regions, Jarsolav Kulich
IGC Proceedings (1993-2023)
Zambia is a large country (7S2 972 km"Z) with a low population density (about 1 Olkm2), 3 distinct seasons and 3 a8f(!-ecological regions, Each region has a specific temperature and rainfall regime, The country has 2.6 million head of cattle of various breeds concentrated in regions of low (<700 mm) to moderate (8()()..1000 mm) annual rainfall with high to moderate temperatures, Calving and turn off rates are low in the traditional sector, Pasture research started 10 years ago. Work reported here was concentrated in each of the agro-ecologlcal regions. The results suggested that production from local breeds could be improved by adopting and integrating pasture farming.
Increasing Forage Quantity And Quality Through Mixed Cropping In Kuestan, Iran, A Kashani, J Bahrani
Increasing Forage Quantity And Quality Through Mixed Cropping In Kuestan, Iran, A Kashani, J Bahrani
IGC Proceedings (1993-2023)
It was concluded from 3 years of trials in Iran that oats-clover and barley-clover mixtures produced more forage than their pure stands and than medic mixtures. Nitrogen topdressing increased the forage yields of mixtures. Since mixtures are more nutritious and balanced as feed for livestock, their planting is recommended for the region.
Influence Of Phosophogypsum On Bahiagrass Production, J E. Rechcigl, I S. Alcordo
Influence Of Phosophogypsum On Bahiagrass Production, J E. Rechcigl, I S. Alcordo
IGC Proceedings (1993-2023)
Phosphogypsum, a byproduct of phosphoric acid production, is 85-93% gypsum and is a potential source of sulphur and calcium for crops. Phosphogypsum is presently accumulating at the rate of more than I SO million tonnes annually world wide. A field study was conducted for 2 years to evaluate the influence of phosphogypsum on bahiagrass (Paspalum notatum Flugge) production in Florida. Treatments consisted of 5 rates of phosphogypsum (0, 0.2, 0.4 and 1.0 Mg phosphogypsum/ha applied annually and 2.0 and 4.0 Mg phosphogypsum ha applied at a one time application). Treatments were replicated 4 times in a randomised complete block …
Influence Of Selected Horizon Combinations Of A Spodosol On Bahiagrass Yield And Quality, H Ibrikci, J E. Rechicigl, E A. Hanlon
Influence Of Selected Horizon Combinations Of A Spodosol On Bahiagrass Yield And Quality, H Ibrikci, J E. Rechicigl, E A. Hanlon
IGC Proceedings (1993-2023)
In recent field studies, bahiagrnss (Paspalum notatum Flugge), a major forage crop in Florida, did not respond lo added Phosphorus fertiliser even though preplant Mehlich I (Ml) soil test indicated very low extractable P (<10 mg/kg). Surface (Ap), E, spodic (Bh) horizons of a Spodosol, limed spodic horizon (BhL), and commercial builders sand were packed into cylindrical plastic bags in selected combinations. The combinations were Ap-B-S, Ap-E-Bh, Ap-E-BhL, and sand. P was applied in 2 rates as O and 60 kg P/ha to selected bags. Bahiagrass sod with its stolon-root system was collected from an unfertilised bahiagrass field, then placed on the soil surface within the growth bags. The experiment was arranged in a completely randomised design with 4 replicates in a glasshouse. Total forage yield, root dry weight, root growth and distribution were determined in each bag over a period of 175 days. Total forage dry matter was increased with addition of 60 kg P/ha in all treatments. Root growth was not influenced by treatments but dry root weight was different in each treatment. Overall forage crude protein content was not influenced by treatments.
Nutrient Cycling Via Forage Litter In Tropical Grass-Legume Pastures, R J. Thomas, M Fisher, C Lascano, I M. Rao, M Ayarza, N Asakawa
Nutrient Cycling Via Forage Litter In Tropical Grass-Legume Pastures, R J. Thomas, M Fisher, C Lascano, I M. Rao, M Ayarza, N Asakawa
IGC Proceedings (1993-2023)
Monthly rates of litter production were compared in pastures of Brachiaria dictyonenra either alone or in associations with Centrosema acutifolium or Stylosanthes capitata at low (I) medium ( 1.5), or high (2.0 animals/ha) stocking rates. Even though litter biomass at the start of grazing differed between treatments, after 3 months' grazing there were no differences either between grass or grass-legume pastures or between stocking rates in monthly rates of litter production. There were large differences in the quality of pasture litter however, the associations having 3- to· 4-fold greater concentrations of N, P and Ca compared with grass-only pastures …
New Panicum Maximum Cultivars For Diverse Ecosystems In Brazil, L Jank, J C.G Costa, Y H. Savidan, C B. Do Valle
New Panicum Maximum Cultivars For Diverse Ecosystems In Brazil, L Jank, J C.G Costa, Y H. Savidan, C B. Do Valle
IGC Proceedings (1993-2023)
In 1982 a collection of 426 accessions of Panicum maximum (guinea grass) representative of its natural variability, was introduced co Brazil through a co-operative agreement with Prance. After 2 years of agronomic and morphological evaluation of this germplasm in small plots in Campo Grande, MS, 25 accessions were selected to be tested in diverse ecosystems throughout Brazil. The national network of evaluation was established in January 1988, over 7 states of the country: 2 in the humid tropics, 3 in the savannas, 1 towards the north-east coast and 1 in the subtropics. Agronomic variables studied were dry season and year-round …
Agronomic Evaluation Of Brachiaria Germplasm In Brazil, C B. Do Valle, S Calixto, M C. Amexquita
Agronomic Evaluation Of Brachiaria Germplasm In Brazil, C B. Do Valle, S Calixto, M C. Amexquita
IGC Proceedings (1993-2023)
Increasing demands for new cultivars of grasses adapted to the acid soils of tropical savannas and resistant to spittlebugs (Homoptera:Cercopidae) led CIAT to organise collections of Brachiaria spp. germplasm in eastern Africa in the 1980s. Over 800 accessions were assembled and distributed to various countries. Bmpresa Brasileira de Pesquisa Agropeculiria (BMBRAPA) received about 300 accessions which are being evaluated with the objective of selecting superior Brachiaria cultivars to be released to farmers. This paper reports on the agronomic performance of 184 accessions belonging to 5 different species, evaluated for 2 years in small plots, in Campo Grande, MS, Brazil. Parameters …