Effects of Interval and Height of Mowing on Growth of Merion and Common Kentucky Bluegrass (Poa pratensis L)<sup>1</sup>

Juska, F. V.; Hanson, A. A.

doi:10.2134/agronj1961.00021962005300060009x

Cited by 26 publications

(19 citation statements)

References 4 publications

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“…Also, 32 P tends to remai.n localized at the point of placement 5 • There has been considerable research on the effect of dipping height on the rooting of turfgrasses. These studies indicate that lowering the clipping height of Kentucky bluegrass decreases the amount of rooting (4,6,7,9). The depth of rooting for Kentucky blue-gra>s turf would appear to be from 50.8 to 61.0 em (20 to 24 inches) 4 (9).…”

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confidence: 92%

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

O’Donnell¹,

Love²

1970

Agronomy Journal

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Radioactive phosphorus provides a means by which the depth and lateral extent of ‘Merion’ Kentucky bluegrass (Poa pratensis L.) rooting can be measured over the growing season under field conditions. Each 15.2‐cm (6‐inch) depth increment, irrespective of the height of cut, was found to have 1.5 to 3 times as much root activity as the increment immediately below it. The depth of rooting activity was least in the spring (May) and increased to a maximum in the fall (October). The relative lateral distribution of root activity for both heights of cut was approximately 62, 27, 8, and 2% of the total activity for each 5.1‐cm (2‐inch) lateral strip from the line of injection. The lateral extent was least in the spring and greatest in the fall. Throughout the growing season there was more total root activity with the 4.4‐cm (1 ¾‐inch) cutting height than with the 2.2‐cm (7/8‐inch) cutting height. In comparison to the radioactive phosphorus method, the physical measurement of roots tends to overestimate the importance of the roots above 20.3 to 25.4 cm (8 to 10 inches) and underestimate the importance of the roots below this depth.

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confidence: 92%

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

O’Donnell¹,

Love²

1970

Agronomy Journal

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“…Most of the research that has dealt with mowing has examined changes in morphology or visual quality of grasses in response to cutting height. Juska and Hanson (1961) observed that low mowing heights (2.5 cm) reduced leaf regrowth of Kentucky bluegrass (Poa pratensis L.) and root production. Leaves of Kentucky bluegrass often assume a more horizontal orientation and form more leaves per tiller in response to low mowing heights (2.5 cm) to maximize photosynthetic leaf area (Sheffer et al, 1978).…”

Section: Literature Reviewmentioning

confidence: 99%

“…is reduced as mowing heights are lowered (Fagemess et al, 2000;Razmjoo et al, 1996;Sailaiz et al, 1995). In general, root growth decreases as mowing height decreases (Juska and Hanson, 1961;Krans and Beard, 1985). Kentucky bluegrass (Poa pratensis L.) clipped weekly at 6.2 and 2.5 cm developed 41 and 76% less root mass, respectively, than non-mown controls two to four weeks after the first mowing (Krans and Beard, 1985).…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of mowing frequency and mower sharpness on efficiency of PSII and antioxidant and carbohydrate metabolism of creeping bentgrass

Howieson

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The quality of this reproduction is dependent upon the quality of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleed-through, substandard margins, and improper alignment can adversely affect reproduction. In the unlikely event that the author did not send a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion.

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“…T HE impact of management practices on the physiology of closely mowed turfgrasses has received limited study due to a lack of experimental techniques which adequately measure fundamental growth processes in field grown turf. Stress conditions including cold resistance (3,14), heat tolerance (4, 13), submersion (1,2), and defoliation (5,9), have been investigated as factors governing turf growth and survival. In most studies, however, turf condition is measured by visual appearance, color, growth rate, survival, or by analyzing for metabolic components such as water soluble carbohydrates or nitrogenous compounds.…”

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confidence: 99%

A Carbon‐14 Technique for Measuring Photosynthate Distribution in Field Grown Turf¹

Hull

1976

Agronomy Journal

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The effect of management or environmental factors on the short‐term distribution of current photosynthate within field grown turf has received little study. However, variation in the initial energy flow within turfgrasses certainly influences the longer term energy levels and ultimate survival of turf. A technique is described by which photoassimilated carbon was followed within ‘Merion’ Kentucky bluegrass (Poa pratensis L.) grown as a closely mowed turf under field conditions. A 189 cm2 area of grass was covered with a glass bell jar into which introduced 15 μCi of 14CO2. Depending on climatic conditions, between 19 and 69% of the 14C applied was recovered from a 10.5‐cm plug of turf harvested within 2 hours of treatment. During the 15 min exposure period, the temperature within the bell jar increased, however, 14CO2 sufficient for tracer analysis was assimilated presumably via a normal carbon reduction pathway. The utility of this technique is illustrated in a fertility experiment which showed that high fertility turf (24‐4‐8 or 48‐8‐16 g/m2 N‐P‐K) often fixed more 14CO2 than did low fertility grass (12‐2‐4 g/m2). Photoassimilated 14C translocated to roots at a greater velocity in September than in December but the quantity translocated was greater in December. During late summer, photosynthate moved more rapidly to roots of low fertility turf and accumulated in deep roots more than it did in heavily fertilized turf. This technique appears to provide an effective method for measuring the short term energy distribution within turfgrass sod grown under natural conditions.

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Effects of Interval and Height of Mowing on Growth of Merion and Common Kentucky Bluegrass (Poa pratensis L)¹

Abstract: Synopsis Cutting height influenced the quantity of roots to a greater degree than cutting frequency. Frequent mowing will not permit a decrease in mowing height without a reduction in the quantity of roots.

Cited by 26 publications

References 4 publications

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

Influence of mowing frequency and mower sharpness on efficiency of PSII and antioxidant and carbohydrate metabolism of creeping bentgrass

A Carbon‐14 Technique for Measuring Photosynthate Distribution in Field Grown Turf¹

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Effects of Interval and Height of Mowing on Growth of Merion and Common Kentucky Bluegrass (Poa pratensis L)1

Abstract: Synopsis Cutting height influenced the quantity of roots to a greater degree than cutting frequency. Frequent mowing will not permit a decrease in mowing height without a reduction in the quantity of roots.

Cited by 26 publications

References 4 publications

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake1

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake1

Influence of mowing frequency and mower sharpness on efficiency of PSII and antioxidant and carbohydrate metabolism of creeping bentgrass

A Carbon‐14 Technique for Measuring Photosynthate Distribution in Field Grown Turf1

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Effects of Interval and Height of Mowing on Growth of Merion and Common Kentucky Bluegrass (Poa pratensis L)¹

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

Effects of Time and Height of Cut on Rooting Activity of Merion Kentucky Bluegrass as Measured by Radioactive Phosphorus Uptake¹

A Carbon‐14 Technique for Measuring Photosynthate Distribution in Field Grown Turf¹