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Predicting Forage Production From Pasture By Use Of The Delphi Technique, E Hovingh
Predicting Forage Production From Pasture By Use Of The Delphi Technique, E Hovingh
IGC Proceedings (1977-2023)
The objective of this study was to determine the effect of various pasture management techniques on the predicted yield of forage from pasture. Twelve researchers, extension and industry personnel in Atlantic Canada participated in the Delphi technique as well as the Conjoint analysis to arrive at estimates for the yield response expected from the use of single pasture management techniques and multiple combinations of the same. The results of the Delphi survey demonstrated that all of the pasture management techniques would increase the yield of forage, from seven percent up to forty-seven percent beyond the yield of unimproved, unmanaged pasture.
Foliar Blight Of Centrosema Pubescens (Benth) At Ibadan In The Lowland Humid Tropics, L Ezenwa, N A. Amusa, V O. Oben
Foliar Blight Of Centrosema Pubescens (Benth) At Ibadan In The Lowland Humid Tropics, L Ezenwa, N A. Amusa, V O. Oben
IGC Proceedings (1977-2023)
The aetiology and epidemiology of leaf blight of centro (Centrosema pubescens Benth) was investigated at Ibadan in the lowland humid tropics of Nigeria. Rhizoctonia solani was associated with the leaf blight of centro. The pathogen was harboured by itchgrass (Rottboellia cochinchinensis (Lour) Clayton), a weed growing within and outside the centro plot. High inoculum population of 4.0 + 0.3 x 106/g soil was estimated in the soil. The seed of centro were free of R. solani. Field infection of the disease occurs during the peak of the rainy season beginning in patches which later spread causing extensive …
Endophyte Effects In Central European Festuca Pratensis Huds Varieties On Field Emergence And Yield On Various Sites, W Schoberlein, M Pfannmoller, S Eggestein
Endophyte Effects In Central European Festuca Pratensis Huds Varieties On Field Emergence And Yield On Various Sites, W Schoberlein, M Pfannmoller, S Eggestein
IGC Proceedings (1977-2023)
Central European varieties of Festuca pratensis Huds. are sometimes infested by the endophytic fungus Acremonium uncinatum. This paper informs about field trials staged on 9 locations for studying biomass and seed yield of different Festuca pratensis varieties, each endophyte-infested (E+) and endophyte-free (E-). In the E+-variants of 2 selected varieties, which were tested in 17 field experiments for field emergence, the number of emerged plants per m2 was significantly increased in 8 cases, preferably on the same location. Analyses of the biomass yield furnished better results in most E+- variants, albeit seldom on a significant level. However, the average …
The Role Of Endophyte (Acremonium Lolii) In Listronotus Bonariensis Pest Tolerance Of Italian Ryegrass (Lolium Multiflorum), E Torres, E Cisternas, L Angulo
The Role Of Endophyte (Acremonium Lolii) In Listronotus Bonariensis Pest Tolerance Of Italian Ryegrass (Lolium Multiflorum), E Torres, E Cisternas, L Angulo
IGC Proceedings (1977-2023)
The objective of this study was to determine the behaviour of new varieties of Italian ryegrass (Lolium multiflorum) and their tolerance to the attack of the Argentine stem weevil (Listronotus bonariensis) in cultivars with and without endophyte (Acremonium lolli). The variety of better behaviour was Aberoscar; although it does not have endophyte, it was not very damaged, the one which leads one to belive there are other factors besides the endophyte influencing this cultivar’s resistance to the Argentine stem weevil. The effect of the endophyte was of little importance in the control of the insect pest.
The Accession Of Grassy Weed Seeds Into The Soil Seedbank Of Grasslands, R.D B. Whalley, T S. Andrews, M R. Gardener
The Accession Of Grassy Weed Seeds Into The Soil Seedbank Of Grasslands, R.D B. Whalley, T S. Andrews, M R. Gardener
IGC Proceedings (1977-2023)
Perennial grassy weeds of grasslands are usually characterised by substantial and long lived soil seedbanks. A comparison of the potential seed production and accession into the seedbanks of giant Parramatta grass (Sporobolus indicus var. major (Buse) Baaijens) and Chilean needle grass (Nassella neesiana (Trin. & Rupr.) Barkworth) revealed big differences in their potential annual seed production and in the proportion being incorporated into the seedbank. The potential seed production of giant Parramatta grass was about 668,000 seeds m-2 and only about 0.3% of these were incorporated into the seedbank. The figures for Chilean needle grass were 22,000 seeds …
The Influence Of Sowing Rate On Ryegrass (Lolium Perenne) And White Clover (Trifolium Repens) Types On The Clover Content In The Ryegrass White Clover Swards, O Y. Romero, B N. Butendieck, A C. Sleman
The Influence Of Sowing Rate On Ryegrass (Lolium Perenne) And White Clover (Trifolium Repens) Types On The Clover Content In The Ryegrass White Clover Swards, O Y. Romero, B N. Butendieck, A C. Sleman
IGC Proceedings (1977-2023)
The objective of this study was to determine whether the sowing rate of ryegrass Nui (Lolium perenne), Giant and Huía white clover (Trifolium repens) influence the clover content in the ruegrass-clover mixed sward. The trial was conducted at the Carillanca Experimental Station. Three sowing rates were studied: 18, 12 and 6 kg/ha for Nui perennial ryegrass and 3, 4.5 and 6 kg/ha for Giant and Huía white clover. The clover content in the sward was increased by reducing the sowing rate of the ryegrass from 18 to 12 and 6 kg/ha or increasing the sowing rate …
Influence Of The Acremonium Endophytes On Agronomic Traits Of Perennial Ryegrass And Tall Fescue In France, C Ravel, F Balfourier, G Charmet
Influence Of The Acremonium Endophytes On Agronomic Traits Of Perennial Ryegrass And Tall Fescue In France, C Ravel, F Balfourier, G Charmet
IGC Proceedings (1977-2023)
Seven cultivars of perennial ryegrass (Lolium perenne) with (EI) and without (EF) Acremonium endophytes were compared in trial plots at 5 locations in France. Such a trial was also established with 6 tall fescue (Festuca arundinacea) cultivars in 5 locations. These trials were sown either in 1994 or 1995. Yields and visual traits (rust and drought tolerances, vigour 6-weeks following the sowing) were assessed. The data were analysed by means of variance analysis with two main factors (cultivars and endophyte status) and their interaction. As interaction was not significant, some significant differences between EI and EF …
Acremonium-Endophytes Of Perennial Ryegrass (Lolium Perenne) In France, C Ravel, C Astier, F Balfourier, G Charmet
Acremonium-Endophytes Of Perennial Ryegrass (Lolium Perenne) In France, C Ravel, C Astier, F Balfourier, G Charmet
IGC Proceedings (1977-2023)
Infection with endophytic fungi (Acremonium spp.) was detected in seeds of wild populations of perennial ryegrass (Lolium perenne) collected in France by private breeding companies and INRA. In total, 262 populations were examined and 70% contained Acremonium. It is worth noticing that most populations are endophyte infected but generally endophyte infection rates per population were low. Isolation of endophyte from each infected population is under progress and had already shown that the two taxonomic groups of endophytes of perennial ryegrass are present. This work lead to a view of the distribution of Acremonium endophytes from perennial …
Impact Of Virus Resistance On White Clover Persistence And Productivity, G A. Pederson, M R. Mclaughlin
Impact Of Virus Resistance On White Clover Persistence And Productivity, G A. Pederson, M R. Mclaughlin
IGC Proceedings (1977-2023)
The objective of this study was to compare the virus-resistant white clover (Trifolium repens L.) germplasm SRVR with virus-susceptible cultivars for productivity and persistence under clipping in several different environments. Four cultivars and SRVR were broadcastseeded in the field at Mississippi State, MS in the fall of eight different years. Dry matter yields were taken for 2-4 years after seeding using mowers for defoliation. Virus-resistant SRVR had greater dry matter yields than all four cultivars in the second year, greater than three of four cultivars in the third year, and greater than two of four cultivars in the fourth …
Influence Of The Fungal Endophyte Acremonium Lolii On Dry Matter Yield Of Perennial Ryegrass In Galcia, Spain, J A. Oliveira, J Collar
Influence Of The Fungal Endophyte Acremonium Lolii On Dry Matter Yield Of Perennial Ryegrass In Galcia, Spain, J A. Oliveira, J Collar
IGC Proceedings (1977-2023)
A field experiment studying the impact of the ryegrass endophyte (Acremonium lolii), was carried out at two locations in Galicia (Northwest Spain): Mabegondo on the Atlantic coast and Puebla de Brollón in the interior. Of 56 half-sib families of Galician perennial ryegrass (Lolium perenne L.) studied, 28 held endophyte (E+) and the other 28 not (E-). All these families were established in trial plots in 1992. Significant differences between E- and E+ families were obtained, and E+ families had a higher (P < 0.05) first cut, spring and total yield than E- families at Puebla de Brollón (dry location) in the third year after planting. The infection of perennial ryegrass with some strains of A. lolii seems to benefit the host in stressful conditions. In some areas of Galicia, climatic conditions are often stressful for perennial ryegrass and the chances of E+ plants being favored by either natural or artificial selection seems high.
Insecticidal Activity Of N-Formylloline, D L. Dahlman, M R. Siegel, L P. Bush
Insecticidal Activity Of N-Formylloline, D L. Dahlman, M R. Siegel, L P. Bush
IGC Proceedings (1977-2023)
Several insect species were sensitive to N-formylloline, a pyrrolizidine alkaloid found in significant concentrations in tall fescue (Festuca arundinacea L.) infected with Neotyphodium coenophialum (= Acremonium coenophialum) Glenn, Bacon et Hanlin. Topical or injected doses were toxic in a dose dependent manner. Acute doses resulted in quick incapacitation; lower doses caused behavioral changes, uncoordinated movements, tremors, etc. Insects tested included green bug, bird cherry-oat aphid, large milkweed bug, spined soldier bug, American cockroach, house fly, face fly, cat flea and Japanese beetle.
Study Of The Diversity Of Soil Animal Community In The Songnen Plain Grassland Of China, Yin Xiuqin, Zhu Tingcheng, Zhong Weiyan, Peng Wu Kui
Study Of The Diversity Of Soil Animal Community In The Songnen Plain Grassland Of China, Yin Xiuqin, Zhu Tingcheng, Zhong Weiyan, Peng Wu Kui
IGC Proceedings (1977-2023)
This paper makes a diversity study of 8 habitats of soil animal communities in Songnen plain grassland. The research shows that the better the habitat condition is, the higher the diversity index of soil animals, and the worse the habitat condition is the lower the diversity index of soil animals. The diversity of soil animal communities has a positive relationship with soil organic matter, total nitrogen, and has a negative relationship with pH value. It has no obvious relationship with soil water content and total phosphorus. The diversity of soil animal communities decreases with increasing depth of soil layer and …
Effect Of Grazing And Soils On The Structure Of Mountain Vegetation Communities, I Alonso
Effect Of Grazing And Soils On The Structure Of Mountain Vegetation Communities, I Alonso
IGC Proceedings (1977-2023)
The range of life forms of four grassland communities in the Cantabrian mountains (N. Spain) was studied under grazing and when grazing was excluded in relation to soil characteristics. Hemicryptophytes were the most abundant life form in all communities and they increased their number when ungrazed. Diversity was bigger in the communities with shrubs, which presented a more heterogeneous structure. As a whole, grasslands on calcareous soils were more diverse than those on siliceous soils.
Depression On The Hygrophytic Weed In Pasture Establishment With Consideration To Wildlife Habitat, T Sugiura, H Kobayashi
Depression On The Hygrophytic Weed In Pasture Establishment With Consideration To Wildlife Habitat, T Sugiura, H Kobayashi
IGC Proceedings (1977-2023)
We investigated the influences of lower ground water level on the hygrophytic weed which luxuriated at the abandoned paddy field as a pasture establishment method in wetland with consideration to wildlife habitat. In comparison with the control, the leaf of common reed (Phragmites communis Trin.) at the drainage area was decreased by the 60% in weight and distributed at lower layers due to water stress. The photosynthetic rate of the common reed was also decreased by 64%. At the end of the growing season, the botanical composition began to include more short type species.
Medicinal Plants As Indicators Of Grassland Biodiversity, G Nagy, I Vinczeffy, K Peto
Medicinal Plants As Indicators Of Grassland Biodiversity, G Nagy, I Vinczeffy, K Peto
IGC Proceedings (1977-2023)
A study has been made to identify the medicinal plants on the existing Hungarian grasslands. Sixty-three plants have been found to possess medicinal effects. Twenty-six, 15 and 22 species are for internal, internal or external and external use, respectively. This result reflects the low management intensity of grasslands in the country, as well as the species richness of semi-natural grasslands. It is suggested that the number of medical plants on the grassland, - in general - can also be used as an indicator of grassland biodiversity.
Graded Management Intensity Of Grassland System For Enhancing Biodiversity On A Species And Landscape Scale, E Meister, B Koch
Graded Management Intensity Of Grassland System For Enhancing Biodiversity On A Species And Landscape Scale, E Meister, B Koch
IGC Proceedings (1977-2023)
The objective of our research is to maintain and enhance wildlife resources, landscape diversity and economic competitiveness of grassland-ruminant systems. This may be accomplished by a diversified, graded management intensity of pastures and meadows (Dietl,1990), resulting in a network of intensively and extensively used grassland and other semi-natural habitats. Botanical diversity is thus increased on both a habitat and landscape level. In intensively farmed regions it may be necessary to re-establish species-rich grassland types and adjust management intensity to the site conditions and species’ requirements.
Mineral Contents Of White Clover Grass And Nitrogen Fertilized Grass Pastures For Lambs, R Sormunen-Cristian, P Nykänen-Kurki, J Peltola
Mineral Contents Of White Clover Grass And Nitrogen Fertilized Grass Pastures For Lambs, R Sormunen-Cristian, P Nykänen-Kurki, J Peltola
IGC Proceedings (1977-2023)
The mineral contents (Ca, P, Mg, K, Na, Fe, Cu, Zn, and Mn) of white clover grass without nitrogen and grass-only pastures with annual nitrogen rates of 0, 120 and 250 kg ha-1 were studied in 1994 and 1995. The pastures were grazed twice per season by growing lambs. The white clover contents averaged 25% and 42%, respectively. The Ca and Mg contents and the Ca/P ratio were higher, and the K/(Ca+Mg) equivalent ratio lower in white clover grass than in grass-only swards. The P content of white clover grass was similar to that of grass, and the K content …
Collection And Evaluation Of The Section Platycarpe From The Peoples Republic Of China, T A. Cambell, G Bao, Z L. Xia
Collection And Evaluation Of The Section Platycarpe From The Peoples Republic Of China, T A. Cambell, G Bao, Z L. Xia
IGC Proceedings (1977-2023)
The Peoples Republic of China is the center of origin of several species of the section Platycarpae, which could contain genes for drought and cold tolerance that would be of significant benefit to cultivated alfalfa (Medicago sativa L.) Of particular interest are Medicago archiducis-nicolai Sirjaev, M. edgeworthii Sirjaev, and M. ruthenica (L.) Ledebour. Of 105 M. ruthenica accessions collected from 15 diverse environments in Inner Mongolia, 50 were evaluated in the field at Beltsville MD (USA) in 1993 and 1994 on an acid soil (pH 6.4) deficient in boron and potassium. Significant variation was noted for stand retention, reaction to …
Assessing The Impact Of Dietary Addition Of Lignin On Growth Performance, Nitrogen Balance And Faecal Microorganisms In Grain-Fed Veal Calves, L E. Phillip, E S. Idziak
Assessing The Impact Of Dietary Addition Of Lignin On Growth Performance, Nitrogen Balance And Faecal Microorganisms In Grain-Fed Veal Calves, L E. Phillip, E S. Idziak
IGC Proceedings (1977-2023)
A study was conducted with ALCELLR - lignin (A-lignin) to evaluate its impact on performance of grain- fed veal calves. Thirty two male calves (avg. initial wt, 190 kg) were fed for 13 weeks grain corn and a protein supplement with added A-lignin to supply 0, 1.25%, 2.5% or 5.0% of diet. Eight other calves were used to study nitrogen balance, and grab samples of faeces were analyzed for anaerobic, aerobic and coliform bacteria. A-lignin at 1.25% of diet increased (p<.01) weight gain by 12%. Addition of A-lignin also decreased (p< 0.01) organic matter digestion, increased (p<.01) faecal N excretion but did not significantly alter N balance. A-lignin reduced (p< 0.01) faecal ammonia concentration but increased (p <.01) DM content of grab samples of faeces; there were no significant effects on populations of faecal microorganisms. The study revealed a beneficial effect of A-lignin on calf growth but the reason for the response was not uncovered.
Qualitative Evaluation Of D.H.P. (Dihidroxipiridine) In The Urine Of Buffaloes Fed With Leucaena, P B. Alcantara, T A. Ferreira, D A. Beisman, A.M F. Pereira
Qualitative Evaluation Of D.H.P. (Dihidroxipiridine) In The Urine Of Buffaloes Fed With Leucaena, P B. Alcantara, T A. Ferreira, D A. Beisman, A.M F. Pereira
IGC Proceedings (1977-2023)
The aim of this study was to evaluate the DHP elimination in the urine of buffaloes fed with three levels of leucaena (0,10 and 20g of leucaena's DM/kg LW0.75), plus corn silage at 2.5% of LW in D.M. The main purpose was to estimate the levels of mimosine toxicity in those resistant animals. Data showed that DHP started to be eliminated at the first urination in both levels of leucaena. This occurred one hour after ingestion. DHP was present up to the third urination (5 hours after ingestion) in the highest level.
Genomic Cloning Of Fasciola Hepatica Excretory-Secretory Antigenic Genes In E. Coli, Xu Heng, Zheng Li, Liu Shigui, Shen Bin, Wu Fend
Genomic Cloning Of Fasciola Hepatica Excretory-Secretory Antigenic Genes In E. Coli, Xu Heng, Zheng Li, Liu Shigui, Shen Bin, Wu Fend
IGC Proceedings (1977-2023)
A complementary DNA (cDNA) library was constructed from the mRNA of adult worms of Fasciola hepatica in the expression vector gt11, the size of the library contained approximately 2.4 x 105 recombinants and the recombinant efficiency was 85%. The library was directedly screened with a rabbit antisera raised against a excretory-secretory (ES) antigen of Fasciola hepatica. Two positive clones of strong signal were selected from a group of 200 positive clones, named FH3 and FH7. The length of external fragments of two recombinants were 0.85Kb (FH3) and 1.15Kb (FH7). The E.coli 1089 host was infected by recombinants FH3 and FH7 …
Effect Of Plant Species On The Development And Vertical Migration Of Larvae Of Gastrointestinal Nematodes Which Parasitise Sheep, J H. Niezen, W.A. G. Charleston, J Hodgson, C M. Miller, H A. Robertson
Effect Of Plant Species On The Development And Vertical Migration Of Larvae Of Gastrointestinal Nematodes Which Parasitise Sheep, J H. Niezen, W.A. G. Charleston, J Hodgson, C M. Miller, H A. Robertson
IGC Proceedings (1977-2023)
The development and migration of gastrointestinal nematode larvae on a range of herbage species were compared following a series of standardised contaminations with sheep faeces over two years. In 1992/93, greatest numbers of larvae were recovered from browntop (Agrostis capillaris cv Grasslands Muster), cocksfoot (Dactylis glomerata cv Grasslands Kara), ryegrass (Lolium perenne cv Grasslands Nui) and Yorkshire fog (Holcus lanatus cv Massey Basyn) while the lowest numbers were recovered from white clover (Trifolium repens cv Grasslands Huia) with the other herbages intermediate. In 1993/94, highest numbers were recovered from Yorkshire fog and ryegrass, lowest numbers from …
Seed Proteinase Inhibitors From Annual Medics Active Against Insect Pests, M Odoardi, A Tava, F Ceciliani
Seed Proteinase Inhibitors From Annual Medics Active Against Insect Pests, M Odoardi, A Tava, F Ceciliani
IGC Proceedings (1977-2023)
Several different species of annual medics have been tested for the occurrence and concentration of trypsin inhibitors in the seed. Trypsin Inhibitory Activity (TIA) has been in fact related to the level of resistance to biotic and abiotic stresses. Wide variation was found for TIA among species, with the highest values shown by the snail medic (Medicago scutellata). After a simple and rapid procedure of chromatographic purification, the Trypsin Inhibitor (TI) from snail medic has been tested towards the trypsin-like proteinases extracted from larvae of different phytophagous insects, showing high levels of Inhibitory Activity. The complete amino acid …
The Effect On Intake Palatability And Digestibility Of Phenolic Compounds In Tagasaste (Chamaecytisus Proliferus), N J. Edwards, J C. Mailey, D M. Mcneill, J B. Lowry, C S. Mcsweeney, D A. Henry, C M. Oldham
The Effect On Intake Palatability And Digestibility Of Phenolic Compounds In Tagasaste (Chamaecytisus Proliferus), N J. Edwards, J C. Mailey, D M. Mcneill, J B. Lowry, C S. Mcsweeney, D A. Henry, C M. Oldham
IGC Proceedings (1977-2023)
The major secondary metabolites currently identified in tagasaste (Chamaecytisus proliferus) belong to the phenolic group of compounds. The principal phenolic compounds are the flavones, apigenin and luteolin, but low concentrations of condensed tannins, the isoflavonoid daidzein and the alkaloid sparteine have also been detected in some samples. No flavonols have been detected. There is a strong relationship between the concentration of phenolic compounds in tagasaste and its palatability. Furthermore, digestibility of tagasaste is relatively high throughout the year, thereby implicating intake as the major factor influencing the seasonality of liveweight performance of livestock grazing tagasaste. Despite confirmation of …
Effect Of Endophyte-Infected Tall Fescue Hay On Dairy Heifers Under European Intensive Management, J C. Emile, J P. Ravault, J M. Chabosseau
Effect Of Endophyte-Infected Tall Fescue Hay On Dairy Heifers Under European Intensive Management, J C. Emile, J P. Ravault, J M. Chabosseau
IGC Proceedings (1977-2023)
Two fields were established at Lusignan (France) with the same variety of tall fescue but differing in the rate of Acremonium coenophialum seed infestation : 0 % = E- ; 100 % = E+. Dairy heifers were fed ad libitum with E- or E+ hay and were given in addition 1.7 kg DM of concentrates. No effect was noticed on the intake (5.65 vs 5.63 kg DM) as well as on ADG (874 vs 838 g/d) regarding E- vs E+ hay resp. However, prolactin concentration was significantly halved when heifers were fed with the E+ hay. More temperate climatic conditions …
Feeding Strategies To Optimize Reproductive Performance Of Cattle Grazing High Protein Pastures In Uruguay, H R. Tosi, K M. Wittenberg
Feeding Strategies To Optimize Reproductive Performance Of Cattle Grazing High Protein Pastures In Uruguay, H R. Tosi, K M. Wittenberg
IGC Proceedings (1977-2023)
Alternative feeding strategies were investigated for Holstein heifers grazing a vegetative red, Trifolium pratense L., and white clover, Trifolium repens L., pasture. A total of 474 grazing heifers were supplemented varying amounts of corn silage, Zea mays, during the breeding season in an effort to improve reproductive performance. Animal response to supplementation, whether on spring or winter pasture, was similar. Corn silage supplemented at 18.8 or 28.8% DM basis of total diet, for winter and spring pastures, respectively, resulted in animal weight gains similar to that of heifers receiving legume pasture only. Serum urea nitrogen and reproductive performance for heifers …
Strategies For Improving Efficiency Of Beef Cattle In Tall Fescue Pasture Systems, J C. Waller, H A. Fribourg
Strategies For Improving Efficiency Of Beef Cattle In Tall Fescue Pasture Systems, J C. Waller, H A. Fribourg
IGC Proceedings (1977-2023)
A beef (Bos taurusL.) cattle producer must allocate land and forage resources to meet nutrient needs of the entire herd. Using 20 yr of calving and grazing data, templates of herd composition, associated Total Digestible Nutrients (TDN) requirements over the whole year, and forage TDN production were developed for a typical herd and land area. The monthly energy needed by the entire herd was relatively constant. Forage productivity varied monthly, indicating the need to plan for efficiently using surplus TDN from some seasons to meet needs at other times. This approach could be expanded to include more definitive …
Eneficial Use Of Grasses Artificially Infected With Endophytes, Non-Toxic To Animals, G.C M. Latch, L R. Fletcher
Eneficial Use Of Grasses Artificially Infected With Endophytes, Non-Toxic To Animals, G.C M. Latch, L R. Fletcher
IGC Proceedings (1977-2023)
Information presented in this paper demonstrates that Ryegrass Staggers does not occur in animals which graze ryegrasses (Lolium sp.) artificially infected with a strain of Acremonium endophyte which does not produce the tremorgenic toxin lolitrem B. Peramine is produced by the endophyte and this alkaloid protects the grass from attack by Argentine stem weevil. New Zealand farmers have used a ryegrass cultivar infected with this strain of endophyte for the past four years and there are no reports of Ryegrass Staggers in animals grazing it. Strains of endophytes have been found in other grasses which do not produce toxins …
The Effect Of Ryegrass Endophyte On Milk Production From Dairy Cows In Northern New Zealand, E R. Thom, D A. Clark, C D. Waugh, R J. Mccabe, V T. Van Vught, B.J L. Kock
The Effect Of Ryegrass Endophyte On Milk Production From Dairy Cows In Northern New Zealand, E R. Thom, D A. Clark, C D. Waugh, R J. Mccabe, V T. Van Vught, B.J L. Kock
IGC Proceedings (1977-2023)
The aim of this study was to compare the milk production of cows grazing endophyte-infected perennial ryegrass (Lolium perenne L.) pasture with those grazing endophyte-free pastures. High and nil endophyte ryegrass pastures were drilled with and without white clover (Trifolium repens L.) in autumn 1993. White clover was completely removed in autumn 1995. High endophyte pastures had >85% of tillers infected but nil endophyte pastures were rapidly contaminated with endophyte-infected ryegrass and had 50% infection by autumn 1996. Losses in milk production due to endophyte were small (<6%), and occurred in only 2 of the 6 three week test periods. Cows showed clinical symptoms of ryegrass staggers in summer/autumn 1995 but not in 1996. Heat stress symptoms were absent. Losses of milk production occurred when lolitrem B levels were low (spring 1994) and when cows did not show clinical staggers (summer 1996). Other chemicals or agronomic factors could be important determinants of the milk production responses.
Use Of Willows (Salix Spp) As Drought Fodder For Sheep, S K. Oppong, P D. Kemp, G B. Douglas, B T. Bulloch
Use Of Willows (Salix Spp) As Drought Fodder For Sheep, S K. Oppong, P D. Kemp, G B. Douglas, B T. Bulloch
IGC Proceedings (1977-2023)
The effects of cutting height and harvesting times on the forage yield, yield components and quality of Tangoio hybrid willow and Kinuyanagi willow were examined, to evaluate these willows as drought fodder for sheep. Tangoio (3.8 tDM/ha) outyielded Kinuyanagi (3 tDM/ha) in edible forage production and provided reasonable quality fodder (nitrogen content of 2.0 % and digestibility of 65 -69 %). The high edible forage yield of the willows relative to pasture (0.8 tDM/ha) during January and April showed that they provided potentially valuable supplements to pasture production. The willows, especially Tangoio, are recommended for use as maintenance fodder for …