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1982

University of Nebraska - Lincoln

Department of Agronomy and Horticulture: Faculty Publications

Articles 1 - 6 of 6

Full-Text Articles in Life Sciences

Sod-Seeding Perennial Grasses Into Eastern Nebraska Pastures, John F. Sampson, Lowell E. Moser Nov 1982

Sod-Seeding Perennial Grasses Into Eastern Nebraska Pastures, John F. Sampson, Lowell E. Moser

Department of Agronomy and Horticulture: Faculty Publications

Eastern Nebraska and neighboring areas have large amounts of depleted pastures which consist of annual bromegrasses (Bromus spp.), Kentucky bluegrass (Poapratensis L.), and numerous broadleaf weeds. Such pastures need renovation but complete seedbed preparation is expensive and may enhance erosion. The objective of our study was to determine if sod-seeding grasses offered an alternative to complete seedbed preparation. Three weedy pastures in southeast Nebraska on a Hastings silty clay loam (fine, montmorillonitic, mesic Udic Argiustoll), a Lamo silty clay loam [fine-silty, mixed (calcareous), mesic Cumulic Haplaquoll], and a Geary silty clay loam (fine-silty, mixed, mesic Udic Argiustoll) were …

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Respiration, Carbohydrate Content, And Leaf Growth Of Tall Fescue, Lowell E. Moser, J. J. Volenec, C. J. Nelson Jul 1982

Respiration, Carbohydrate Content, And Leaf Growth Of Tall Fescue, Lowell E. Moser, J. J. Volenec, C. J. Nelson

Department of Agronomy and Horticulture: Faculty Publications

Tall fescue (Festuca arundinacea Schreb.) was grown in controlled environment chambers with a 14-hour photoperiod, and then kept in darkness for 8 days in one experiment and 20 days in another. The objectives were to determine concentrations of total nonstructural carbohydrates (TNC) and relate them to leaf elongation rates (LER) and to rates of dark respiration (R,). After various times in darkness, leaf terminal meristems in vegetative tillers, root tips, and center-sections of collared leaf blades were excised, and oxygen consumption was measured.

Oxygen consumption was generally highest in terminal meristerns, intermediate in root tips, and lowest in mature …

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Variability For Quality And Agronomic Traits In Forage Sorghum Hybrids, J. F. Pedersen, Herman J. Gorz, Francis A. Haskins, W. M. Ross Jul 1982

Variability For Quality And Agronomic Traits In Forage Sorghum Hybrids, J. F. Pedersen, Herman J. Gorz, Francis A. Haskins, W. M. Ross

Department of Agronomy and Horticulture: Faculty Publications

The variation among 49 F, forage sorghum [Sorghum bicolor (L.) Moench] hybrids from a 7 x 7 cross-classified design was explored in 1979 and 1980 for the following traits: dry matter (DM), crude protein (CP), in vitro dry matter disappearance (IVDMD), neutral detergent fiber (NDF), acid detergent fiber (ADF), and acid detergent lignin (ADL). Differences were found among hybrids for all traits. Parental means for males generally had a wider range of variation than for females. The means of hybrids involving the male parent, 'White Collier', were highest in IVDMD, and lowest in NDF, ADF, and ADL. IVDMD was …

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Divergent Selection For Hydrocyanic Acid Potential In Sudangrass, Herman J. Gorz, Francis A. Haskins, K. P. Vogel Mar 1982

Divergent Selection For Hydrocyanic Acid Potential In Sudangrass, Herman J. Gorz, Francis A. Haskins, K. P. Vogel

Department of Agronomy and Horticulture: Faculty Publications

Alteration in hydrocyanic acid potential (HCN-p) of the forage is one of the important objectives in sudangrass [Sorghum sudanense (Piper) Stapf] breeding programs. The effectiveness of recurrent phenotypic selection for increasing or decreasing HCN-p in sudangrass was evaluated in two cycles of individual plant selection in the cultivar 'Greenleaf'. In cycle 1, HCNP means of the high and low populations were higher and lower, respectively, than for Greenleaf, but only the low-HCN-p population was significantly different from Greenleaf. In cycle 2, mean HCN-p values of both populations differed significantly from Greenleaf. The average realized heritability for the two cycles …

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Performance Of Blends Of Short, Medium, And Tall Sorghum For Forage, Herman J. Gorz, Francis A. Haskins Mar 1982

Performance Of Blends Of Short, Medium, And Tall Sorghum For Forage, Herman J. Gorz, Francis A. Haskins

Department of Agronomy and Horticulture: Faculty Publications

This study was conducted to evaluate a wider range of plant types and agronomic and quality traits than had been previously reported for blends of sorghum [Sorghum bicolor (L.) Moench]. Three groups of sorghum cultivars and hybrids, each including a i-dwarf (tall), a 2-dwarf (medium), and a 3-dwarf (short) sorghum, were used in a 2-year study. Within each group the following seven blends were compared: tall (T), medium (M), and short (S); T and M; T and S; M and S; T alone; M alone; and S alone. Principal emphasis was given to total dry matter (DM) production (sum …

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Influence Of Radiation Level On Apparent Hydrocyanic Acid Potential Of Sorghum Seedlings, Francis A. Haskins, Herman J. Gorz, R. B. Clark Jan 1982

Influence Of Radiation Level On Apparent Hydrocyanic Acid Potential Of Sorghum Seedlings, Francis A. Haskins, Herman J. Gorz, R. B. Clark

Department of Agronomy and Horticulture: Faculty Publications

The hydrocyanic acid potential (HCN-p) of forage sorghum [Sorghum bicolor (L.) Moench] and sudangrass [S. sudanense (Piper) Stapf] seedlings may be estimated by a spectrophotometric procedure that is simple and rapid. As assayed by this procedure, seedlings of a number of lines appeared to have increased HCN-p when grown under increased levels of radiation. In investigations of this apparent increase, 7-day seedlings of a number of forage sorghum and sudangrass lines were grown under photosynthetically active radiation levels of about 180μE • m-2 • sec-1 (PAR-1) or 400μE • m-2 • …

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