Effect of Time and Rate of N Applications on Yield, Nutritive Value Index, Crude Protein, and Nitrate Content of Bromegrass1
- W. K. Look Kin and
- A. F. MacKenzie2
The influence of pre-winter, spring, summer, and fall applications of N on yield and quality of bromegrass was studied over a 12-month period on two Quebec soils. N applications increased the yield of dry matter, digestible energy (Yield-NVI), and crude protein significantly (5%) for each increment of 112 kg N/ha. There was no significant difference among pre-winter, spring, and summer applications of N. Mitscherlich and multiple regression equations indicated that dry matter yield of bromegrass could be increased by rates of N above 336 kg/ha.
N applied prior to any growth period did not affect the NVI of bromegrass but the crude protein and NO3 contents were significantly increased in the resulting harvested material.
N-fertilized bromegrass at the 336 kg/ha level gave comparable yields of dry matter and digestible energy to alfalfa-brome pastures.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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