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The effect of variety and fertilizer nitrogen level on red clover production
Author(s) -
FRAME J.,
HARKESS R. D.,
HUNT I. V.
Publication year - 1976
Publication title -
grass and forage science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.716
H-Index - 56
eISSN - 1365-2494
pISSN - 0142-5242
DOI - 10.1111/j.1365-2494.1976.tb00782.x
Subject(s) - red clover , yield (engineering) , agronomy , fertilizer , nitrogen , biology , mathematics , zoology , horticulture , chemistry , materials science , organic chemistry , metallurgy
Established swards of two diploid and two tetraploid red clover varieties sown pure received 0, 75, 150, 225 or 300 kg ha −1 N fertilizer and were cut three times in June, August and October 1971. The total yields of herbage DM for red clover varieties ranged from 8.01 to 11.32 t ha −1 ; swards sown with tetraploids Hungaropoly and Hera Pajbjerg were superior by 25% in DM yield and 23% in CP yield. The red clover contribution to these total yields of DM ranged from 6.05 to 10.69 t ha −1 ; tetraploid clovers outyielded diploids by 42% in DM yield and 39% in CP yield. The mean effect of N level on yield and on compositional attributes was slight. Total yields of herbage DM, averaged over all varieties, ranged from 9.50 to 10.22 t ha −1 and of total herbage CP from 1.76 to 1.91 t ha −1 . The influence of N level on the red clover contribution was negligible. DM yields ranged from 8.54 to 8.72 t ha −1 and CP yields from 1.60 to 1.64 t ha −1 . Superiority of tetraploid clovers over diploids was again confirmed. Red clover swards sown pure can give high yields without the application of fertilizer N.