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Articles 2491 - 2520 of 12002

Full-Text Articles in Physical Sciences and Mathematics

Variation In Protein Quality Of Forage Legumes During Spring Growth, M. Gierus, J. Kleen, F. Taube May 2023

Variation In Protein Quality Of Forage Legumes During Spring Growth, M. Gierus, J. Kleen, F. Taube

IGC Proceedings (1993-2023)

The utilisation of forage legumes in combination with reduced N inputs as fertilisers is an alternative for the production of high quality forage. Although white clover (WC) is widely used in grassland and has a high content of crude protein (CP), a combination of this high CP content with a high proportion of rapidly-available proteins and fast degradation rate in the rumen may reduce the efficiency of N use by ruminants in comparison with other forage legumes. The objective of the present study was to investigate the variation in content of CP fractions A, B and C in different forage …

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Effects Of Particle Size In Forage Samples For Protein Breakdown Studies, G. Pichard, C. Tapia May 2023

Effects Of Particle Size In Forage Samples For Protein Breakdown Studies, G. Pichard, C. Tapia

IGC Proceedings (1993-2023)

Coupling ruminal processes of hydrolysis and synthesis continues to be a research issue where more progress is needed. This requires the development of good protein assessment methods, particularly when representing the breakdown processes that occur in fresh pastures eaten by herbivores. Laboratory analyses need to deal with small and homogeneous samples, but the mechanical reduction of particle size may not reflect the actual digestion kinetics occurring when the original fresh forage is consumed. Such physical traits may alter the release of non-structural compounds and the penetration of microbial enzymes (Boudon et al., 2002). The objective of this work was …

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Ruminal Disappearance And Passage Rates In Fresh Nezasa Dwarf Bamboo Growing In Japanese Native Pasture, Masato Yayota, J. Karashima, T. Kokestu, M. Nakano, Shigeru Ohtani May 2023

Ruminal Disappearance And Passage Rates In Fresh Nezasa Dwarf Bamboo Growing In Japanese Native Pasture, Masato Yayota, J. Karashima, T. Kokestu, M. Nakano, Shigeru Ohtani

IGC Proceedings (1993-2023)

Nezasa dwarf bamboo (Pleioblastus chino makino) is one of major native forages for grazing in Japan. However its nutritional utilisation in the rumen has been little studied. The object of this research was to measure ruminal disappearance and passage rates in fresh Nezasa dwarf bamboo compared with improved grass.

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Ruminal Dry Matter, Neutral Detergent Fibre And Acid Detergent Fiber Degradation Kinetics Of Dominant Pasture Forages In Kurdestan Province Of Iran, A. A. Sadeghi, P. Shawrang, A. Nikkhah May 2023

Ruminal Dry Matter, Neutral Detergent Fibre And Acid Detergent Fiber Degradation Kinetics Of Dominant Pasture Forages In Kurdestan Province Of Iran, A. A. Sadeghi, P. Shawrang, A. Nikkhah

IGC Proceedings (1993-2023)

Neutral detergent fiber (NDF) is a major chemical component of forages and its degradability (dNDF) is an essential parameter in predicting their energetic value. Moreover, dNDF has been used in models to estimate the physical fill of fibrous feeds in the rumen and, therefore, the intake capacity of animals. As the available information on the nutritive value of pastoral forages is limited a study was undertaken to measure chemical composition and cell wall degradation kinetics of eight pasture forages in the rumen.

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The Effects Of Urease Source And Moisture Content On The Nutritive Value Of Brachiaria BrizantHa Hay Treated With Urea, Ricardo A. Reis, L. M. A. Bertipaglia, G. M. P. Melo, A. P. Oliveira, S. Luca May 2023

The Effects Of Urease Source And Moisture Content On The Nutritive Value Of Brachiaria BrizantHa Hay Treated With Urea, Ricardo A. Reis, L. M. A. Bertipaglia, G. M. P. Melo, A. P. Oliveira, S. Luca

IGC Proceedings (1993-2023)

Ammoniation has a high potential to increase the nutritive value (NV) of mature tropical grasses hays. Urea utilisation, like ammonia, seems to be a promising alternative for on-farm treatment of low quality forage in Brazil. Urea has the advantages over anhydrous ammonia of being widely available, easier to handle and, in some countries, less expensive. The aim of this work was to study the effects on the efficiency of urea treatment of palisade grass (Brachiaria brizantha cv. Marandu) hay of the moisture level, and the urease source.

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Herbage Mass And In Situ Dry Matter Ruminal Degradation Kinetics Of Brachiaria Spp, E. Valencia-Chin, A. A. Rodríguez-Carías, R. Ramos-Santana, S. Pagán-Riestra May 2023

Herbage Mass And In Situ Dry Matter Ruminal Degradation Kinetics Of Brachiaria Spp, E. Valencia-Chin, A. A. Rodríguez-Carías, R. Ramos-Santana, S. Pagán-Riestra

IGC Proceedings (1993-2023)

In Puerto Rico, Brachiaria decumbens cv. Basilisk has been promoted as a potential forage for acid soils and humid areas, but with limited success. Recently, B. brizantha cv. Marandú and a hybrid (B. brizantha x B. Ruziziensis) cv. Mulato were introduced for evaluation on acid soils and as a potential replacement for cv. Basilisk, but little information is available on yield performance under grazing or nutritive value. The objective of this study was to assess herbage mass and nutritive value of grazed pastures consisting of Basilisk, Marandú, and Mulato and determine the rate of in situ dry matter …

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Physical Impediment Towards Digestive Breakdown In Leaf Blades Of Brachiaria Brizantha, B. Lempp, Cacilda B. Do Valle, M. Das G. Morais, R. A. Borges, E. Detmann May 2023

Physical Impediment Towards Digestive Breakdown In Leaf Blades Of Brachiaria Brizantha, B. Lempp, Cacilda B. Do Valle, M. Das G. Morais, R. A. Borges, E. Detmann

IGC Proceedings (1993-2023)

Consumption of grasses is influenced by the physical properties of forages which confer resistance to digestive breakdown. Such barriers may be the proportion of indigestible tissues, girder structure and epidermal cell arrangements. Anatomical factors, if identified early are invaluable tools in breeding and selection programmes for forages of high quality. The objective of this study was to verify which anatomical attributes might be interfering in the physical resistance to rumen breakdown in Brachiaria brizantha ecotypes.

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Effects Of Forage Species And Stage Of Maturity On In Situ Disappearance Of Organic Matter And Fibre Fractions, H. S. Hussein May 2023

Effects Of Forage Species And Stage Of Maturity On In Situ Disappearance Of Organic Matter And Fibre Fractions, H. S. Hussein

IGC Proceedings (1993-2023)

Nutrient utilisation by ruminants is altered by the forage species and its maturity. Maturity is the major factor affecting forage morphology and quality. Forage quality is reduced with maturity due to a decrease in the leaf:stem ratio and an increase in fibre components (Ugherughe, 1986). Improving forage utilisation by ruminants depends on accurate measurements of their nutritive value by using in vitro and in situ methods. The objective of this study was to assess the nutritive value (i.e., extent of in situ disappearance of organic matter [OM], neutral detergent fibre [NDF], and acid detergent fibre [ADF]) of four grass species …

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The Effect Of Nitrogen Fertiliser And Season On The In Situ Degradability Of Irish Perennial Ryegrass In Cattle, V. Olsson, J. J. Murphy, F. P. O'Mara, K. O'Connell, J. Humphreys, F. J. Mulligan May 2023

The Effect Of Nitrogen Fertiliser And Season On The In Situ Degradability Of Irish Perennial Ryegrass In Cattle, V. Olsson, J. J. Murphy, F. P. O'Mara, K. O'Connell, J. Humphreys, F. J. Mulligan

IGC Proceedings (1993-2023)

In light of increasing environmental and economic pressure on agriculture to utilise resources more efficiently, protein feeding and its effects are fundamentally important. As grazed grass is the predominant feed in Irish dairy and beef cattle production systems, it is necessary to establish protein values for different grass varieties and cultivars fed. It is also important to investigate the extent of ruminal nitrogen (N) degradability for these grasses since this characteristic greatly influences environmentally damaging urinary N excretion.

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The Effect Of Cow-Diet On The Fermentation Of Forages, J. L. Burke, G. C. Waghorn, S. L. Woodward, I. M. Brookes May 2023

The Effect Of Cow-Diet On The Fermentation Of Forages, J. L. Burke, G. C. Waghorn, S. L. Woodward, I. M. Brookes

IGC Proceedings (1993-2023)

In vitro fermentation of fresh forages minced to resemble chewed material have enabled net proteolysis and volatile fatty acid (VFA) production to be measured using rumen inocula from a cow fed lucerne hay (Burke et al., 2000). However both cow and diet affect the rumen cellulolytic bacterial populations (Weimer et al., 1999) and are able to influence in vitro digestion kinetics (Mertens et al., 1998). The objective of this study was to measure cow-diet effects on in vitro digestion and fermentation of perennial ryegrass (P; Lolium perenne), sulla (S; Hedysarum coronarium), maize (M; Zea maize …

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Fibre Degradation Rate Of Perennial Ryegrass Varieties Measured Using Three Techniques: In Situ Nylon Bag, In Vivo Rumen Evacuation And In Vitro Gas Production, H. Z. Taweel, B. M. Tas, B. A. Williams, A. Elgersma, J. Dijkstra, S. Tamminga May 2023

Fibre Degradation Rate Of Perennial Ryegrass Varieties Measured Using Three Techniques: In Situ Nylon Bag, In Vivo Rumen Evacuation And In Vitro Gas Production, H. Z. Taweel, B. M. Tas, B. A. Williams, A. Elgersma, J. Dijkstra, S. Tamminga

IGC Proceedings (1993-2023)

In Western Europe, perennial ryegrass is the most widely used grass species for grazing cattle, because of its high productivity, palatability and nutritive value. However, the low dry matter intake (DMI) of perennial ryegrass pasture has been identified as a major factor limiting milk production of high producing dairy cows. Altering the chemical, physical and mechanical characteristics that contribute to its low DMI through grass breeding and the choice of variety may be a way forward in trying to maximise its DMI. This study aimed to examine whether perennial ryegrass varieties differ in their NDF degradation rates (kdNDF).

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Perennial Ryegrass Variety Differences In Nutritive Value Characteristics, T. J. Gilliland, R. E. Agnew, A. M. Fearon, F. E. A. Wilson May 2023

Perennial Ryegrass Variety Differences In Nutritive Value Characteristics, T. J. Gilliland, R. E. Agnew, A. M. Fearon, F. E. A. Wilson

IGC Proceedings (1993-2023)

Animal grazing performance at grass is predominately determined by herbage intake rates, with high yielding dairy cows requiring up to 20 kg/d DM within a limited grazing time (Gibb, 1998). Grass nutritional factors such as seasonal patterns in digestibility and water-soluble carbohydrate levels have been linked to animal productivity (Davies et al., 1991), while sward surface height, herbage mass, bulk density and green leaf mass have been shown to promote high grazing intake (Barrett et al., 2001). Furthermore, fatty acid profiles have been shown to improve the unsaturated fatty acid composition of milk, with potential human health benefits …

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The Nutritional Value Of Cocksfoot (Dactylis Glomerata L.) And Perennial Ryegrass (Lolium Perenne L.) Under Leaf-Stage Based Defoliation Management, L. R. Turner, D. J. Donaghy, P. A. Lane May 2023

The Nutritional Value Of Cocksfoot (Dactylis Glomerata L.) And Perennial Ryegrass (Lolium Perenne L.) Under Leaf-Stage Based Defoliation Management, L. R. Turner, D. J. Donaghy, P. A. Lane

IGC Proceedings (1993-2023)

The perception that cocksfoot is of lower nutritional value and less productive than perennial ryegrass is largely the result of studies in which management was based on perennial ryegrass (to the detriment of cocksfoot) or involved defoliation of both species at the same time (Greenhalgh & Reid, 1969; Johnson & Thomson, 1996). Maintaining plants in a vegetative state through species-specific management is essential to retain the high quality and productivity of cocksfoot. Defoliation at or before 4-5 fully expanded live leaves per tiller is recommended as the ideal physiological regrowth stage for defoliation of cocksfoot, resulting in metabolisable energy (ME) …

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Effect Of Ferulic Acid Esterase Enzyme Application On The In Vitro Digestibility And In Situ Rumen Degradability Of Tropical Grasses, Adegbola T. Adesogan, N. Krueger, C. R. Staples, D. B. Dean, W. Krueger May 2023

Effect Of Ferulic Acid Esterase Enzyme Application On The In Vitro Digestibility And In Situ Rumen Degradability Of Tropical Grasses, Adegbola T. Adesogan, N. Krueger, C. R. Staples, D. B. Dean, W. Krueger

IGC Proceedings (1993-2023)

Tropical grasses are the primary staple diet of most of the domesticated ruminants in the tropical and subtropical regions of the world. However, dry matter (DM) digestibility (DMD) and intake levels of these C4 grasses are considerably low, partly because of high lignin contents. Ferulic acid also impedes fibre digestion in such forages due to formation of cross linkages with digestible xylans. Certain esterase enzymes have been shown to cleave ferulic acid cross linkages in wheat bran but no studies have examined whether such enzymes can be used to increase the digestion of tropical grasses. Therefore, the objective of …

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Influence Of Internode Length On Degradability Of Lucerne Stems, H. G. Jung, F. M. Engles, J. F. S. Lamb May 2023

Influence Of Internode Length On Degradability Of Lucerne Stems, H. G. Jung, F. M. Engles, J. F. S. Lamb

IGC Proceedings (1993-2023)

Lignification of plant tissues restricts degradation of forages by ruminants. The undegradable lignified middle lamella/primary cell wall prevents rumen microbes from accessing undamaged adjacent plant cells. In contrast, walls of non-lignified tissues are completely degradable. Preliminary observations of how deeply rumen microbes could degrade different tissues within 20- to 30-mm long lucerne (Medicago sativa L.) stem pieces indicated a two-fold range in depth of degradation among stem samples. Studies were undertaken to determine if extent of cell wall degradation in lucerne was influenced by length of stem internodes.

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Mating Ewes On Condensed Tannin-Containing Forages Increases Ewe Reproductive Rate And Reduces Lamb Mortality, T. N. Barry, C. A. Ramirez-Restrepo, E. L. Mcwilliam, N. Lopez-Villalobos, P. D. Kemp May 2023

Mating Ewes On Condensed Tannin-Containing Forages Increases Ewe Reproductive Rate And Reduces Lamb Mortality, T. N. Barry, C. A. Ramirez-Restrepo, E. L. Mcwilliam, N. Lopez-Villalobos, P. D. Kemp

IGC Proceedings (1993-2023)

Action of condensed tannin (CT) reduces forage protein degradation in the rumen and increases the absorption of amino acids from the small intestine (Barry & McNabb 1999). This paper reports the effects of grazing ewes on two CT-containing forages during mating upon ewe reproductive rate and lamb mortality.

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Ruminal Proteolysis In Forages With Distinct Endopeptidases Activities, G. Pichard, C. Tapia, R. Larraín May 2023

Ruminal Proteolysis In Forages With Distinct Endopeptidases Activities, G. Pichard, C. Tapia, R. Larraín

IGC Proceedings (1993-2023)

Improving livestock efficiency in utilization of nitrogen resources continues to be a major environmental and economic objective. Zhu et al. (1999) have shown that plant endopeptidases are activated as a response to cutting stress. Previous work in our laboratory explored over 300 entries of forage genotypes and found a broad diversity in enzymatic activity by means of hydrolysis in gelatine and direct autolysis assays in forage tissues. The objective of this work was to assess if the species previously identified as having high or low endopeptidase activity, would behave consistently when exposed to ruminal microbial proteolysis.

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Polyphenol Oxidase Activity And In Vitro Proteolytic Inhibition In Grasses, J. M. Marita, R. D. Hatfield, G. E. Brink May 2023

Polyphenol Oxidase Activity And In Vitro Proteolytic Inhibition In Grasses, J. M. Marita, R. D. Hatfield, G. E. Brink

IGC Proceedings (1993-2023)

Harvesting and storing high quality forage in the cool humid regions remains a challenge due to the potential for protein degradation during ensiling. Red clover is an exception as high protein levels are maintained during ensiling. Decreased proteolytic activity in red clover is due to polyphenol oxidase (PPO) activity and appropriate o-diphenol substrates (Jones et al., 1995, Sullivan et al., 2004). This project was undertaken to determine if PPO activity is present in a range of grasses and the potential role in proteolytic inhibition in the presence of the o-diphenol caffeic acid.

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The Death Of Plants In Animals, M. K. Theodorou, A. Kingston-Smith, P. Morris May 2023

The Death Of Plants In Animals, M. K. Theodorou, A. Kingston-Smith, P. Morris

IGC Proceedings (1993-2023)

It is necessary first to understand some of the basic concepts associated with the digestion of the plant biomass within the rumen when considering mechanisms for altering/enhancing N-conversion efficiency in the forage-fed ruminant. Although it is generally assumed that breakdown of plant proteins in the rumen is mediated by microbial enzymes, there is increasing evidence to suggest that both plant and microbial proteases are active during degradation of ingested fresh forage (Beha et al., 2002; Kingston-Smith & Theodorou, 2000; Kingston-Smith et al., 2003, 2004). After fresh plant biomass enters the rumen and prior to extensive plant cell wall …

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Anthelmintic Effects Of Sericea Lespedeza Hay Fed To Goats Infected With Haemonchus Contortus, S. A. Shaik, T. H. Terrill, J. E. Miller, B. Kouakou, G. Kannan, R. M. Kaplan, J. M. Burke, J. A. Mosjidis May 2023

Anthelmintic Effects Of Sericea Lespedeza Hay Fed To Goats Infected With Haemonchus Contortus, S. A. Shaik, T. H. Terrill, J. E. Miller, B. Kouakou, G. Kannan, R. M. Kaplan, J. M. Burke, J. A. Mosjidis

IGC Proceedings (1993-2023)

Infection with gastrointestinal nematodes (GIN), particularly Haemonchus contortus, is the major hindrance to economic goat production in the southern USA. Grazing forages high in condensed tannins (CT) or adding purified CT to the diet has been shown to reduce numbers of parasite eggs in sheep and goat faeces (Min & Hart, 2003). An alternative to grazing is feeding hay from CT-containing forages to livestock to reduce the effects of GIN (Shaik et al., 2004). The purpose of the current study was to test potential anthelmintic effects of feeding sericea lespedeza [(Lespedeza cuneata (Dum.-Cours.) G. Don] hay to …

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Pollen Viability And Seed Setting In Egyptian Clover Under Open And Caged Conditions, B. L. Bhardwaj, A. Kumar May 2023

Pollen Viability And Seed Setting In Egyptian Clover Under Open And Caged Conditions, B. L. Bhardwaj, A. Kumar

IGC Proceedings (1993-2023)

Grown on an area of about 200Kha annually, Egyptian clover (berseem) is the most important winter forage crop of Punjab. Its seed production is erratic due to several factors, including high temperature during flowering, which may affect pollen viability and the role of insect pollinators. Hence, berseem seed production is an entomological problem as much as a botanical one. We studied pollen viability under open and caged conditions, and the role of honeybees in seed setting.

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Effect Of Pre-Planting Seed Treatment Options On Dormancy Breaking And Germination Of Ziziphus Mucronata, Abubeker Hassen, N. F. G. Rethman, Willem A. Van Niekerk May 2023

Effect Of Pre-Planting Seed Treatment Options On Dormancy Breaking And Germination Of Ziziphus Mucronata, Abubeker Hassen, N. F. G. Rethman, Willem A. Van Niekerk

IGC Proceedings (1993-2023)

Ziziphus mucronata (Buffalo thorn) is a multipurpose tree, widely adapted to a range of ecological conditions and tolerant of extreme climatic conditions, including frost and drought (Venter & Venter, 1996). It is a valuable fodder tree for livestock and game animals, especially in the drier parts of Africa (Rothauge et al. 2003). Similar to many other leguminous species, establishment is constrained by low and erratic germination of the seed, which has been attributed mainly to the physical barrier of the stony endocarp and dormancy associated with seed coat impermeability . This experiment aimed to compare the suitability of various …

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Seed Production And Resource Allocation In Three Cultivars Of Achnatherum Hymenoides, Nevada, Usa, Barry L. Perryman, C. A. Busso, Hudson A. Glimp May 2023

Seed Production And Resource Allocation In Three Cultivars Of Achnatherum Hymenoides, Nevada, Usa, Barry L. Perryman, C. A. Busso, Hudson A. Glimp

IGC Proceedings (1993-2023)

Plant production is partially determined by resource allocation among various organs (Monsi & Murata, 1970), however, studies on dry matter partitioning among different plant organs are scarce in general (Marceli, 1996), and lacking in Achnatherum hymenoides. This study compared dry matter production and partitioning among three commercial cultivars (Paloma, Nezpar and Rimrock) of A. hymenoides and identified growth and developmental characteristics that could indicate potential seed production. In addition, the relationship between an organ weight as a percent of total aerial plant biomass was assessed.

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Root Senescence In Red Clover (Trifolium Pratense L.), K. J. Webb, E. Tuck, S. Heywood, M. T. Abberton May 2023

Root Senescence In Red Clover (Trifolium Pratense L.), K. J. Webb, E. Tuck, S. Heywood, M. T. Abberton

IGC Proceedings (1993-2023)

Legume root systems form a mosaic of living, ageing and dead roots and nodules. The balance between these stages alters during plant development. Stressful events (drought, temperature change, reduced carbon supply, etc.) disturb the balance (Butler et al., 1959). Effects of root and nodule death on soil structure, composition and leaching and on plant persistency are understood poorly. Plants with differing senescence patterns are useful tools to study these effects. Molecular studies of root senescence need detailed knowledge of the process and timing of root senescence and death. Biochemical and histochemical markers of senescence were used to generate preliminary …

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Modelling Of Nitrogen Allocation And Partitioning Within Lucerne (Medicago Sativa) Shoot Tissues During Recovery From Defoliation: An Approach To Estimate Forage Production And Nitrogen Composition, F. Meuriot, A. Escobar-Gutiérrez, J-C. Avice, J-C. Simon, F. Lesuffleur, F. Gastal May 2023

Modelling Of Nitrogen Allocation And Partitioning Within Lucerne (Medicago Sativa) Shoot Tissues During Recovery From Defoliation: An Approach To Estimate Forage Production And Nitrogen Composition, F. Meuriot, A. Escobar-Gutiérrez, J-C. Avice, J-C. Simon, F. Lesuffleur, F. Gastal

IGC Proceedings (1993-2023)

Lucerne has been grown over centuries for forage. Its forage production is strongly correlated to the initial taproot and stubble N reserves (Avice et al., 1996; Meuriot et al., 2004). However, the influence of cutting management on the level of N storage and the contribution of these N reserves to forage production still remain unclear and need to be studied at the whole plant level. For this purpose, a deterministic model of N allocation within the different organs and partitioning within different biochemical N pools was developed for lucerne with high and low initial N status and cutting …

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Utilisation Of Photosynthetic Active Radiation By Grasslands In Time And In Space, V. V. Kolomeychenko May 2023

Utilisation Of Photosynthetic Active Radiation By Grasslands In Time And In Space, V. V. Kolomeychenko

IGC Proceedings (1993-2023)

Natural grasslands occupy about 3b ha worldwide This is twice the area of arable lands (McCloud, 1974), making it particularly important to understand the energetic relationships of grasslands. This paper contributes to such an understanding for the steppe and forest-steppe zones of Russia.

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Persistence Strategy Of Panicum Maximum Cv. Tanzania In Grazed Pastures, Patricia M. Santos, L. G. H. De Camargo, M. M. Santoni, N. A. De Souza, C. H. B. A. Prado, C. M. B. Nussio May 2023

Persistence Strategy Of Panicum Maximum Cv. Tanzania In Grazed Pastures, Patricia M. Santos, L. G. H. De Camargo, M. M. Santoni, N. A. De Souza, C. H. B. A. Prado, C. M. B. Nussio

IGC Proceedings (1993-2023)

In many cases, tiller age cohorts survival diagrams show seasonal increases or decreases in rates of tiller birth and death, which may be regarded as persistence strategy (Matthew et al., 2000). The aim of this work was to analyse tiller demographic information of P. maximum cv. Tanzania to determine its persistence strategy.

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Are Leaf Traits Stable Enough To Rank Native Grasses In Contrasting Growth Conditions?, V. Poozesh, R. Al Haj Khaled, P. Ansquer, J. P. Theau, M. Duru, G. Bertoni, P. Cruz May 2023

Are Leaf Traits Stable Enough To Rank Native Grasses In Contrasting Growth Conditions?, V. Poozesh, R. Al Haj Khaled, P. Ansquer, J. P. Theau, M. Duru, G. Bertoni, P. Cruz

IGC Proceedings (1993-2023)

The growing interest in classifying species in response groups relating to variations in environmental factors has triggered the search for functional traits that express differences in ecological behaviour among plant species (Lavorel & Garnier, 2002). Specific leaf area (SLA) and leaf dry matter content (LDMC) reflect a fundamental trade-off in plant functioning between a fast growth rate (high SLA, low LDMC species) and nutrient conservation (low SLA, high LDMC species). This study aimed to analyse the stability of ranking native grasses by SLA and LDMC values under different plant growing conditions.

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Gas Exchange And Stomatal Density Of Brachiaria Brizantha In A Silvopastoral System During One Dry Period, M. Rakocevic, F. C. De Oliveira, J. Ribaski May 2023

Gas Exchange And Stomatal Density Of Brachiaria Brizantha In A Silvopastoral System During One Dry Period, M. Rakocevic, F. C. De Oliveira, J. Ribaski

IGC Proceedings (1993-2023)

The integration of grasses and trees strips (silvopastoral systems, SPS) planted on the contours can be economically beneficial and at the same time reduce erosion (Schaller et al.., 2003). The production of the grass component varies depending on the orientation of the tree strips and distance between trees (Rakocevic & Ribaski, 2003). The aim of this study was to determine the leaf anatomical and functional properties of Brachiaria brizantha Hochst. ex A. Rich. (Bb), in a SPS with Corymbia citriodora Hook. (Cc), in relation to tree orientation and proximity, during one dry period.

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Temperature Response Comparison Of Controlled And Field Environments For Four Tropical Grasses, S. Fukagawa, Yasuyuki Ishii, K. Sato, R. Kobayashi, I. Hattori May 2023

Temperature Response Comparison Of Controlled And Field Environments For Four Tropical Grasses, S. Fukagawa, Yasuyuki Ishii, K. Sato, R. Kobayashi, I. Hattori

IGC Proceedings (1993-2023)

Tropical grasses are cultivated mostly as annuals in the warm region of SW Japan. They have a long-term sowing time after harvesting temperate Italian ryegrass. We compared the early growth of tropical grasses in a controlled environment vs. field data at 2 sowing times to determine their temperate response.

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