Premium
Effect of Time and Rate of N Applications on Yield, Nutritive Value Index, Crude Protein, and Nitrate Content of Bromegrass 1
Author(s) -
Kin W. K. Look,
MacKenzie A. F.
Publication year - 1970
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1970.00021962006200040003x
Subject(s) - dry matter , agronomy , yield (engineering) , organic matter , zoology , nitrate , nitrogen , chemistry , biology , materials science , metallurgy , organic chemistry
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 NO 3 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.