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Quality Traits In Forage Sorghum Harvested At Early Head Emergence And At Physiological Maturity, Jeffrey F. Pedersen, Francis A. Haskins, H. J. Gorz
Quality Traits In Forage Sorghum Harvested At Early Head Emergence And At Physiological Maturity, Jeffrey F. Pedersen, Francis A. Haskins, H. J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
Information about the extent of variation in quality traits among plants sampled at the same developmental stage but on different dates would be useful to forage researchers. The primary purpose of this study was to obtain such information for five forage sorghum [Sorghum bicolor (L.) Moench] cultivars. Percent dry matter, crude protein, and in vitro dry matter disappearance of leaf, stem, and whole plant samples were determined for field-grown samples harvested on three different days during early head emergence (EHE) and once during physiological maturity (PM) for each cultivar. Orthogonal comparisons between EHE and PM sampling stages and among …
False Positive Results In The Vanillin-Hel Assay Of Tannins In Sorghum Forage, M. F. Walton, Francis A. Haskins, H. J. Gorz
False Positive Results In The Vanillin-Hel Assay Of Tannins In Sorghum Forage, M. F. Walton, Francis A. Haskins, H. J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
Vanillin-HCl procedures are widely used for the assay of tannins in plants. In attempts to adapt such procedures for use with sorghum [Sorghum bicolor (L.) Moench.] forage it was found that false positive reactions resulted, that is, red color developed in the presence of HCl with or without vanillin. Leucoanthocyanidins (monomeric proanthocyanidins) may be the constituents responsible for this red color. A "chloroform-HCl" procedure was developed for measuring leucoanthocyanidins in sorghum forage. The procedure avoids interference by chlorophyll or other chloroform-soluble constituents. With vanillin added to the solution, this procedure should also be useful for the assay of condensed …
Variability For Traits Used To Estimate Silage Quality In Forage Sorghum Hybrids, Jeffrey F. Pedersen, Francis A. Haskins, H. J. Gorz, R. Britton
Variability For Traits Used To Estimate Silage Quality In Forage Sorghum Hybrids, Jeffrey F. Pedersen, Francis A. Haskins, H. J. Gorz, R. Britton
Department of Agronomy and Horticulture: Faculty Publications
The variation among 49 F1 forage sorghum [Sorghum bicolor (L.) Moench.] hybrids from a 7 X 7 cross-classified design was explored in 1979 and 1980 for the following silage traits: dry matter (DM), crude protein, in vitro dry matter disappearance (IVDMD), neutral detergent fiber, acid detergent fiber, acid detergent lignin, ammonia, lactate, and Brix of the juice from fresh stalks. Wider ranges generally were found for male than for female parental means. Means for most traits were significantly different among entries. Significant differences among hybrid means over males and over females were found for only DM, IVDMD, and …
Yield, Vigor, And Persistence Of Sand Lovegrass [Eragrostis Trichodes (Nutt.) Wood] Following Clipping Treatments, Lowell E. Moser, L. J. Perry
Yield, Vigor, And Persistence Of Sand Lovegrass [Eragrostis Trichodes (Nutt.) Wood] Following Clipping Treatments, Lowell E. Moser, L. J. Perry
Department of Agronomy and Horticulture: Faculty Publications
Individual sand lovegrass [Eragrostis trichodes (Nutt.) Wood.] plants on a choppy sands range site in Nebraska’s Sandhills were clipped with 7 different harvest regimes for 3 years to determine critical defoliation times. After 3 years unclipped plants had the greatest survival rate and plants harvested only once a year on June 10 or July 10 survived better than those with other harvest regimes. Top and root yields, new tiller counts, and total non-structural carbohydrate (TNC) levels were all reduced severely with multiple harvests within one year. Sand lovegrass plants cannot tolerate close defoliation at anytime of the year although …
Combining Ability Effects For Forage Residue Traits In Grain Sorghum Hybrids, W. M. Ross, H. J. Gorz, Francis A. Haskins, G. H. Hookstra, J. K. Rutto, R. Ritter
Combining Ability Effects For Forage Residue Traits In Grain Sorghum Hybrids, W. M. Ross, H. J. Gorz, Francis A. Haskins, G. H. Hookstra, J. K. Rutto, R. Ritter
Department of Agronomy and Horticulture: Faculty Publications
Combining ability effects of 10 female and 10 male inbred lines were evaluated for agronomic, grain, and forage residue traits in 100 grain sorghum [Sorghum bicolor (L.) Moench] F1 hybrids for 2 years. Traits studied were height, flowering, tillering, seed weight, yield, protein percentage, protein yield of grain, leaves, and stems; and in vitro dry matter disappearance (IVDMD) percentage and digestible dry matter (DDM) yield of leaves and stems. General combining ability (GCA) effects exceeded specific combining ability (SCA) effects for all traits except height in females and grain and leaf yields in males. Both GCA and SCA …
Binding Of Phosphorylated Effectors By Active And Inactive Forms Of Ribulose-1, 5-Bisphosphate Carboxylase, Douglas B. Jordan, Raymond Chollet, William L. Ogren
Binding Of Phosphorylated Effectors By Active And Inactive Forms Of Ribulose-1, 5-Bisphosphate Carboxylase, Douglas B. Jordan, Raymond Chollet, William L. Ogren
Department of Agronomy and Horticulture: Faculty Publications
Activation of ribulose-1, 5-bisphosphate carboxylase by CO2 and Mg2+ is slow and reversible. At subsaturating concentrations of CO2 and Mg2+, positive effectors increase and negative effectors decrease the amount of active enzyme at equilibrium. Pre-equilibrium experiments indicated that both positive and negative effectors inhibit the rates of enzyme activation and deactivation. Greater than 99% inhibition of the activation and deactivation rates was observed at high effector concentrations, indicating that the binding and release of the activators CO2 and Mg2+ occur only with effector-free enzyme. The deactivation rate Ki values for the negative …
Is P-Hyrdoxybenzaldehyde A Major Constituent Of Epicuticular Wax From Sorghum Bicolor Seedlings, Francis A. Haskins, H. J. Gorz
Is P-Hyrdoxybenzaldehyde A Major Constituent Of Epicuticular Wax From Sorghum Bicolor Seedlings, Francis A. Haskins, H. J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
Free p-hydroxybenzaldehyde was not present in appreciable quantity on the surface or in the interior of week-old Sorghum bicolor shoots that had been heated to inactivate hydrolytic enzymes, nor was p-hydroxybenzaldehyde detected in epicuticular wax of greenhouse-grown sorghum ca 4.5 months old.