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Yield and N Accumulation of Meadow Forage Fertilized at Advancing Maturity with N 1
Author(s) -
Rumburg C. B.
Publication year - 1972
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/agronj1972.00021962006400020018x
Subject(s) - forage , human fertilization , agronomy , nitrogen , nitrogen fertilizer , yield (engineering) , fertilizer , biology , zoology , chemistry , organic chemistry , materials science , metallurgy
These experiments were conducted to compare the efficiency of utilization of N applied early in the spring with that applied at increasingly later stages of herbage maturation and to determine if the N concentration of mature herbage could be increased by delayed applications of N fertilizer. Herbage growth and N accumulation were measured at regular intervals from meadows unfertilized and fertilized with N at increasingly later stages of herbage maturation. Nitrogen increased herbage production, but yields declined as the date of application was delayed. Yields from plots fertilized in June or July were lower by about 10 and 23%, respectively, than yields from plots fertilized in mid‐May. Nitrogen was rapidly accumulated in herbage soon after application, but the maximum accumulated concentrations decreased from more than 3 to less than 2% as the date of fertilization was delayed from May until July.