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Effect of Ensiling on the Decomposition of Several Herbicides 1
Author(s) -
Linscott D. L.,
Hagin R. D.,
Wright M. J.
Publication year - 1965
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1965.0011183x000500050024x
Subject(s) - wright , technician , library science , computer science , political science , law , programming language
The herbicide 2,4-DB in 250 ml. of 1-1 v/v water-ethanol was thoroughly mixed with chopped ’Narragansett’ alfalfa (Medicago sativa L.) forage .at rates of 0 and 0.4 pound per ton of green forage. Granulated sugar was added to the treated and untreated forage at rates of 0, 50, and 500 pounds per ton of green material. Control samples of each treatment were quick frozen with dry ice immediately after mixing and stored in a freezer at --10 ° C. The remaining forage was packed in pint jars and allowed to ferment for ~/3, 15, or 30 days. (An estimated 8 hours or ~/3 day elapsed between the time that the forages were treated and packed and the time biological activity was stopped in the freezer.) At the end of the fermentation periods, replicated samples were placed in a freezer for storage at --10 ° ’C. prior to analysis. In another experiment, ’Viking’ birdsfoot trefoil (Lotus corniculatus L.), containing approximately 20% quackgrass (Agropyron repens L.) plus timothy (Phleum pratense L.), was sprayed in the field at rates of 0, 0.1, 1, and 5 pounds per acre of acid equivalent of the dimethylamine salt of 2,4-DB. The trefoil was in the first bloom stage at time of treatment. Two days after spray treatment the forage was cut and packed into tanks with 60 pounds capacity and placed under 800 pounds total pressure (25 psi). Samples of treated forage were quick frozen with dry ice at the time of packing. Six months after ensiling samples were taken and were held at --10 ° C. until analysis. In a third experiment, timothy, orchardgrass (Dactylis glomerata L.), and bromegrass (Bromus inermis I..) growing in a field were sprayed with the alkanolamine salt of 2,4-dichlorophenoxyacetic acid and (2,4-D), the dimethylamine salt of 2,4-DB, and the butoxyethanol ester of 2-(2,5-trichloropropionic) acid (Silvex) at a rate of 1 pound of acid equivalent in 30 gallons of water spray per acre. Two days after spraying, each forage was mowed, chopped immediately into ~-inch pieces, and packed in 2-quart containers, sealed, and allowed to ferment for 3 months. Control samples for each treatment were frozen immediately after field sampling. At the end of fermentation periods, silages were placed in freezer and held at --10 ° C. until analyzed.