Grazing and Fertilization Affect Root Development of Range Grasses

Lorenz, Russell J.; Rogler, George A.

doi:10.2307/3895790

Cited by 36 publications

(27 citation statements)

References 5 publications

(6 reference statements)

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“…Increases in water use result from root proliferation to greater soil depths (Lorenz and Rogler 1967) and may be responsible for the increased CPY. Notably, the apparent recovery of N based on the observed grass yield increases across both years totalled only 26% of applied N. Thus, nearly three-quarters of applied N remained unaccounted for, and may have been immobilized in the soil.…”

Section: Grass Yieldmentioning

confidence: 99%

Herbage yield and crude protein concentration of rangeland and pasture following hog manure application in southeastern Alberta

Blonski¹,

Bork²,

Blenis³

2004

Can. J. Plant Sci.

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Blonski, L. J., Bork, E. W. and Blenis, P. V. 2004. Herbage yield and crude protein concentration of rangeland and pasture following hog manure application in southeastern Alberta. Can. J. Plant Sci. 84: [773][774][775][776][777][778][779][780][781][782][783]. Intensive hog production is expanding into semi-arid regions of Alberta, where perennial forage lands are increasingly targeted for manure application despite limited guidelines for its efficient use. Herbage yield and crude protein were assessed over two consecutive years within two native rangelands and two tame pastures, following different rates (10, 20, 40, 80 and 160 kg ha -1 NH 4 -N), methods (surface banding vs. subsurface injection) and seasons (fall vs. spring) of one-time liquid hog manure (LHM) application. Increasing manure rates improved grass yield across all sites the first growing season after treatment, from 1626 to 3576 kg ha -1 . Although absolute increases in production were greatest on tame pasture, relative yield increases were similar among sites. Average crude protein (CP) concentration also increased from 69 to 91 g kg -1 in the first year. Despite low rainfall and the absence of a yield response in the second year, grass CP and crude protein yield (CPY) were maximized with increased manure application, highlighting the positive effects of manure on forage production, even with drought. Forb yields demonstrated variable effects among sites, with increasing manure decreasing alfalfa and increasing native forbs. Overall, both semi-arid tame pastures and native rangelands responded positively to LHM application, highlighting the complementary nature of hog and forage production under these conditions. Le rendement fourrager augmente avec le taux d'application à tous les endroits la saison végétative suivant le traitement pour passer de 1 626 à 3 576 kg par hectare. Bien que la production augmente davantage dans les prairies artificielles en termes absolus, le rendement relatif demeure le même aux différents endroits. La quantité moyenne de protéines brutes s'accroît elle aussi la première année, soit de 69 à 91 g kg -1 . Malgré la pluie et l'absence de réaction du rendement la deuxième année, la concentration de protéines brutes des herbages et le rendement en protéines brutes atteignent leur maximum avec l'augmentation du taux d'application, ce qui souligne les effets positifs du fumier pour la production fourragère, même quand il y a sécheresse. Le rendement en herbacées dicotylédones révèle que la réaction varie d'un site à l'autre, la production de luzerne diminuant et celle d'herbacées dicotylédones indigènes augmentant avec l'application de fumier. Dans l'ensemble, les prairies artificielles et les grands parcours naturels des régions semi-arides réagissent bien à l'application de lisier, signe que l'élevage de porc et la culture fourragère sont complémentaires dans de telles conditions.

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Section: Grass Yieldmentioning

confidence: 99%

Herbage yield and crude protein concentration of rangeland and pasture following hog manure application in southeastern Alberta

Blonski¹,

Bork²,

Blenis³

2004

Can. J. Plant Sci.

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“…(Schuster 1964;Lorenz and RogIer 1967;Biswell and Weaver 1933;Cook, Stoddart and Kinsinger 1958;and Jam.eson a.nd Huss 1959); the only reported increase was that de scribed by Pearson (1965). Schuster (1964) Research has shown that gras s roots stop growing when the aerial portions are clipped.…”

Section: •• 30'11( ••••••••••••••••••••••••••••••••••••••••••••••••••mentioning

confidence: 99%

Root Dynamics of a Shortgrass Ecosystem

Bartos¹,

Sims²

1974

Journal of Range Management

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OF DISSERTATION ROOT DYNAMICS OF A SHOR TGRASS ECOSYSTEMSeasonal dynamics of roots of a shortgrass system were deter mined by samples collected at two week intervals for two growing seasons (1969)(1970) with a fall and winter sampling period in between.Soil cores were taken to a depth of either 10 cm or 80 cm; the deep cores were used to determine the entire profile distributions of roots.The cores were washed free of soil particles and then the root mass was dried, weighed, ashed and reweighed. All values were expressed on an ash-free basis.Sixty percent of the root weight was in the 0-10 cm segment and 75% was found in the upper 20 cm of the soil profile. The upper 10 em increment had significant variations between dates, but the lower levels remained quite constant.Four grazing treatments (none, light, moderate, heavy) were used to determine if grazing had an effect on the root mas s. No significant differences were found among the four treatments.The usual concept of substrate storage in roots and subsequent

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“…Other measurements of plant vigor included root weight in the top 30.45 cm 3 of soil in the quads harvested for top weight (Lorenz and Rogler 1967), and percentage foliar cover for each zone and each species within each zone, based on 20 sets of randomly chosen, inclined, 10-point frames (Kershaw 1971).…”

Section: Methodsmentioning

confidence: 99%

Human impact on beach and foredune vegetation of North Padre Island, Texas

McAtee

Drawe

1980

Environmental Management

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Vehicular and pedestrian traffic decreased top and root production, percent cover, and diversity of vegetation, and modified species composition on beach and foredune areas of Padre Island National Seashore and Nueces County Park. Degradation of vegetal cover was directly related to the type and intensity of traffic; species in heavily trafficked areas represented earlier successional stages than those in comparable undisturbed areas.

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Grazing and Fertilization Affect Root Development of Range Grasses

Cited by 36 publications

References 5 publications

Herbage yield and crude protein concentration of rangeland and pasture following hog manure application in southeastern Alberta

Herbage yield and crude protein concentration of rangeland and pasture following hog manure application in southeastern Alberta

Root Dynamics of a Shortgrass Ecosystem

Human impact on beach and foredune vegetation of North Padre Island, Texas

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