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Seasonal productivity and chemical composition of marsh reed grass Beaux. harvested periodically from fertilized and unfertilized native sod



Seasonal productivity and chemical composition of marsh reed grass Beaux. harvested periodically from fertilized and unfertilized native sod



Canadian Jour Plant Sci 42(4): 651-659



Yields of marsh reed grass from plots in a native wet-meadow cut two to seven times per summer were reduced in relation to yields of plots cut only once at the end of the season, by 15 to 20 per cent with two to four cuttings, by 35 to 45 per cent with five to six cuttings and about 70 per cent by seven cuttings. Fertilizer applications (200 lb./ac, 16-20-0), during the 2 final years of the 3-year study, increased dry matter from recipient plots cut less than five times in 1960, and from all fertilized plots during 1961. Percentage nitrogen declined progressively in forage of first cuttings from June to September but not in the bi-weekly re-growths. There was no appreciable difference in percentage nitrogen attributable to fertilizer but pounds of nitrogen per acre in forage from fertilized plots exceeded the controls, plots harvested for the first time near the end of June and again at the end of the season being greatest in this respect. Fertilizer increased percentage ether extract slightly, approximately doubled the percentage phosphorus, and had no effect on percentage crude fiber and calcium in the samples tested. Percentages of chemical constituents compared favorably with reported data for upland species.

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