Efficiency of mineral nitrogen fertilization on yield and botanical composition of grassland. VI. The effect of mineral nitrogen fertilization on dry matter yield and economical mineral nitrogen application of grassland depending on its age

Jo, I.H.; Schechtner, G.

Journal of the Korean Society of Grassland Science 11(2): 97-101

1991


Accession: 002094571

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Abstract
In field experiments at Admont (1969-87), Piber (1970-87), Bischofshofen (1970-87) and Gumpenstein (1962-87) in Austria, mixed grassland swards were cut 3-6 times/year and given 0, 30, 60, 90 and 120 kg N + PK after each cut. DM yields/year decreased progressively in plots given PK only; yields of 11-year old pastures were 35% of those of young (1-5 year old) pastures. In plots given N, DM yields after 11 years were only reduced by 11-21% compared with young pastures. N use efficiency was not influenced by stand age.