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Response of 21 Oat Cultivars to Nitrogen Fertilization 1
Author(s) -
Ohm H. W.
Publication year - 1976
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/agronj1976.00021962006800050022x
Subject(s) - cultivar , avena , agronomy , human fertilization , test weight , biology , fertilizer
Abstract The importance of percent protein in oats ( Avena sativa L.) as a food and feed grain has resulted in the recent development of cultivars with an inherently high percent of groat protein. The need to determine the effects of N fertilization as an additional means of increasing the percent protein prompted experiments to determine responses to fertilizer N of 21 oat cultivars differing widely in percent groat protein and several agronomic traits. Two N treatments: one, no added N (40 to 50 kg available N/ha in the soil); and two, 110 kg N/ha in a split application were assigned at random to main plots. The 21 cultivars (19 of A. sativa and 2 of A. sativa × Avena sterilis L.) were assigned at random to subplots. Application of N resulted in significant increases in plant height, lodging score, percent protein, and yield; it did not affect heading date or seed weight; and it reduced test weight. Short‐strawed types increased in plant height more with N application than several taller cultivars although plant height increases were greatest for other tall types. Lodging scores of weaker strawed cultivars did not always increase more with N application than those of stronger strawed cultivars. Percent protein in certain low protein cultivars increased more than that of some high protein cultivars with fertilizer N. A given cultivar may not respond similarly to N for percent protein and/or yield. More extensive testing of potential new cultivars to determine specific fertility × cultivar interactions is recommended.