Comparative responses of Lolium perenne and Phalaris aquatica to multiple growth stresses

2006 ◽  
Vol 46 (9) ◽  
pp. 1131 ◽  
Author(s):  
B. R. Cullen ◽  
D. F. Chapman ◽  
P. E. Quigley
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Nitrogen Limitation ◽  
Nitrogen Availability ◽  
Nitrogen Deficiency ◽  
Distribution Patterns ◽  
Carbon Distribution ◽  
Physiological Basis ◽  
Growth Stresses ◽  
Phalaris Aquatica

The growth and carbon distribution patterns of perennial ryegrass (Lolium perenne L. cv. Yatsyn1) and phalaris (Phalaris aquatica L. cv. Holdfast) were analysed in response to defoliation and limited nitrogen availability stresses, imposed both individually and in combination. Both species showed similar responses to defoliation and nitrogen limitation when applied individually. Defoliation increased proportional export of carbon from residual leaves and carbon distribution to tillers was increased at the expense of roots. Nitrogen deficiency resulted in increased export of carbon to the root system. These results are consistent with source–sink theory. A key finding from this study was that the species responded differently when defoliation and nitrogen limitation were imposed simultaneously. Under these conditions, carbon distribution patterns in phalaris resembled those seen in plants subjected to nitrogen stress, that is, favouring root growth. The response of perennial ryegrass was to continue to support shoot growth at the expense of roots. These results suggest a physiological basis for the poor survival of perennial ryegrass often observed under continuous grazing in dry regions of southern Australia. Results are discussed in relation to the environments to which each species is adapted, and the management requirements for species persistence in marginal environments.

scholarly journals Effect of a molluscicide and an insecticide on the establishment of direct-drilled ryegrass, tall fescue and phalaris

1990 ◽  
pp. 237-240
Author(s):  
D.A. Mccallum ◽  
N.A. Thomson
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Festuca Arundinacea ◽  
Lolium Perenne L ◽  
Phalaris Aquatica ◽  
Species Establishment ◽  
Direct Drilling

The effect of a molluscicide or an insecticide on the establishment, by direct drilling of 'Grasslands Roa' tall fescue (Festuca arundinacea Schreb.) 'Ellett' perennial ryegrass (Lolium perenne L), and 'Grasslands Maru' phalaris (Phalaris aquatica L.) was measured in spring and autumn establishment over 2 years. In autumn after a wet summer the application of a molluscicide significantly increased seedling numbers and establishment yield for ryegrass and tall fescue. A molluscicide applied in autumn after a dry summer or in spring had no effect . Application of insecticide significantly improved the establishment of ryegrass and tall fescue in only one of the two springs and had no effect in autumn. Phalaris was the least responsive of the pasture species to either an insecticide or molluscicide. These differences observed at establishment resulting from the applications of a pesticide were not apparent in an assessment made 1 year later. For tall fescue the results recorded on seedling numbers and yield of sown species at establishment and 1 year would suggest that for this species establishment by direct drilling is not recommended. Keywords pasture establishment, 'Grasslands Roa' tall fescue, 'Ellett' ryegrass, 'Grasslands Maru' phalaris, direct drilling, molluscicide, insecticide

Persistence of temperate perennial grasses in cutting trials on the central slopes of New South Wales

1985 ◽  
Vol 25 (4) ◽  
pp. 832 ◽  
Author(s):  
BD Hill
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
New South ◽  
New South Wales ◽  
Dactylis Glomerata ◽  
Perennial Grasses ◽  
Phalaris Aquatica ◽  
South Wales

Nine experiments were conducted on six different sites in the medium-rainfall (about 700 mm per year) area of central New South Wales to measure the persistence of 15 perennial grasses. Phalaris (Phalaris aquatica and P. aquatica x P. arundinacea) and cocksfoot (Dactylis glomerata) cultivars were the most persistent, while perennial ryegrass (Lolium perenne) cultivars, Demeter fescue (Festuca arundznacea) and perennial veldt grass (Ehrharta calycina) were only short-lived. The cultivars of phalaris were generally similar to each other in persistence, although in some trials Sirocco and Siro 1146 were more persistent and Seedmaster was less persistent than Australian. Berber was the most persistent cocksfoot cultivar, followed by Currie, then Brignoles. Medea was the most persistent perennial ryegrass cultivar, followed by Kangaroo Valley, then Victorian.

Effect of bacterial fertilizers on the properties of a pseudomyceliar chernozem soil and on the biomass of perennial ryegrass (Lolium perenne L.)

2011 ◽  
Vol 60 (1) ◽  
pp. 219-232 ◽  
Author(s):  
Anita Jakab ◽  
János Kátai ◽  
Magdolna Tállai ◽  
Andrea Balláné Kovács
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Chernozem Soil ◽  
Lolium Perenne L

A tenyészedényes kísérletünket a DE AGTC MÉK Agrokémiai és Talajtani Intézet tenyészházában állítottuk be 2010. május 27-én. A kísérletben Debrecen-Látókép környékéről származó mészlepedékes csernozjom vályogtalajt alkalmaztunk, amely az alábbi jellemzőkkel rendelkezett: KA: 37,5; leiszapolható rész: 51%; pH(KCl): 5,5; pH(H2O): 6,6; Hu%: 2,8; AL-P2O5: 140 mg·kg-1; AL-K2O: 316,3 mg·kg-1. Az adatok alapján a kísérleti talaj gyengén savanyú, vályog kötöttségű, közepes nitrogén- és foszfor-, valamint jó kálium-ellátottsággal rendelkezett. A kísérletben kontroll-, műtrágya-, valamint szalmakezelést alkalmaztunk, melyeket bizonyos kombinációkban három különböző baktériumkészítménnyel (Bactofil A, EM-1, Microbion UNC) egészítettünk ki. A kísérletet három ismétlésben véletlenblokk elrendezésben állítottuk be. A tesztnövény angolperje (Lolium perenneL.) volt. A kísérlet kezdetétől számított 8. héten a talaj-, valamint a növényminták begyűjtésére került sor. Meghatároztuk a növényminták száraztömegét, a növény foszfor- és káliumtartalmát, valamint a talajminták nitrát-, valamint AL-oldható foszfor- és káliumtartalmát. Eredményeink alapján főbb megállapításaink a következők: – Az angolperje száraztömegét a műtrágyakezelés szignifikánsan növelte. A hatás a tápelem-ellátottság javulásával magyarázható. – A növény foszforkoncentrációja a műtrágyázás következtében csökkent, amelyet a hígulási effektussal magyarázhatunk. – A növény káliumkoncentrációját a műtrágya-, valamint a műtrágya+baktériumtrágya kezelések szignifikánsan serkentették. – A talaj nitráttartalma szignifikánsan növekedett a műtrágyakezelés kivételével minden kezelésben. – A talaj AL-P2O5-tartalma az NPK-műtrágyázás és az EM-1 kezelés következtében statisztikailag igazolható mértékben megnövekedett, míg az AL-K2O-tartalom kizárólag a szalmakezelés hatására nőtt. A baktériumkészítmények önmagukban alkalmazva általában nem eredményeztek jelentős változást a vizsgált paraméterekben, azonban a készítmények szerves/ásványi anyagokkal kombinált adagolása esetében különböző mértékben befolyásolták a vizsgált mutatókat.

The effect of biological additives on the composition and nutritive value of silage

1990 ◽  
Vol 1990 ◽  
pp. 139-139
Author(s):  
M Gonzalez Yanez ◽  
R Mcginn ◽  
D H Anderson ◽  
A R Henderson ◽  
P Phillips
Keyword(s):  
Cell Wall ◽  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Nutritive Value ◽  
Enzyme System ◽  
Lolium Perenne L ◽  
Grass Silage ◽  
Forage Harvester

It Is claimed that the use of the correct enzyme system as an additive on grass silage will satisfactorily control the fermentation and reduce the cell-wall fibre content, thus preserving the nutrients In the silage and aiding their utilisation by the animal (Henderson and McDonald, 1977; Huhtanen et al, 1985; Raurama et al, 1987; Chamberlain and Robertson, 1989; Gordon, 1989;).The aim of the present experiment was to assess the effect of biological additives, enzymes or a combination of enzymes with an Inoculum of lactic acid bacteria, on the composition of silage and on its nutritive value when offered to store lambs as the sole constituent of their diet.On 1st June 1988, first cut perennial ryegrass (Lolium perenne L) at pre-ear emergence was ensiled direct cut untreated (U), treated with a commercial enzyme (E) or with a commercial inoculum of lactic acid bacteria with enzymes (I) in 6t capacity bunker silos. The grass was cut with a mower and lifted with a New Holland precision chop forage harvester. The additives were pumped onto the grass using a dribble bar sited over the pick-up drum.

Invasion Resistance of Tall Fescue (Festuca arundinaceae) and Perennial Ryegrass (Lolium perenne) to Kikuyugrass (Pennisetum clandestinum)

1997 ◽  
Vol 11 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Clyde L. Elmore ◽  
Victor A. Gibeault ◽  
David W. Cudney
Keyword(s):  
Lolium Perenne ◽  
Perennial Ryegrass ◽  
Tall Fescue ◽  
Invasion Resistance ◽  
Seeding Rate ◽  
Pennisetum Clandestinum ◽  
Stolon Length

Overseeding established kikuyugrass swards with tall fescue or perennial ryegrass reduced kikuyugrass cover. Renovation prior to seeding did not aid in the establishment of these two species. Increasing the seeding rate from 79 to 157 kg/ha improved the establishment of perennial ryegrass but not tall fescue. When kikuyugrass plugs were introduced into established turf, tall fescue reduced the invasion of kikuyugrass stolons more than perennial ryegrass. Tall fescue reduced percent kikuyugrass cover, number and spread of stolons, and biomass (compared to perennial ryegrass). The newer turf-type tall fescue cultivars ‘Bonsai,’ ‘Falcon,’ and ‘Olympic’ were more effective than the older tall fescue cultivar ‘Fawn’ in reducing kikuyugrass invasion by reducing stolon number, stolon length, and biomass.

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