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THE EFFECT OF SEVERITY OF DEFOLIATION AND NITROGEN FERTILIZER ON THE GROWTH OF PHALARIS TUBEROSA L.
Author(s) -
Grimmett S. G.
Publication year - 1967
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.1365-2494.1967.tb00500.x
Subject(s) - dry matter , agronomy , irrigation , fertilizer , yield (engineering) , nitrogen , mathematics , nitrogen fertilizer , grazing , split plot , biology , significant difference , chemistry , materials science , statistics , organic chemistry , metallurgy , randomized block design
The responses of Phalaris tuberosa L. to cutting to 1/2‐ and to 3‐in. at 3 levels of nitrogen (0, 23 and 92 lb/ac after each cut) were investigated in two irrigated, small‐plot trials. A technique involving the use of sheet‐iron borders embedded in the soil to contain root systems, irrigation water and fertilizer was developed. The 3‐in. cutting height gave greater dry‐matter yields than J in., the difference reaching significance only with applied N. Plant mortality was significantly greater for the 1/2‐in. cutting height at each N level. N significantly increased DM yield at both cutting heights, the greatest yield being at the higher application rate. Plant mortality at both cutting heights was significantly reduced by applied N. The results are discussed in relation to the most suitable grazing management for sustained growth of irrigated Phalaris swards.