Management of Warm‐Season Annual Grass Residue on Annual Ryegrass Establishment and Production

Autor: R. A. Anders, J. F. Beatty, Daren D. Redfearn, David C. Blouin, F. B. Martin, Gregory J. Cuomo
Rok vydání: 1999
Předmět:
Zdroj: Agronomy Journal. 91:666-671
ISSN: 1435-0645
0002-1962
DOI: 10.2134/agronj1999.914666x
Popis: Early-season forage production of annual ryegrass (Lolium multiflorum Lam.) is reduced in the southeastern USA when established no-till rather than with conventional tillage. We hypothesized that annual warm-season grass residue interferes with seedling establishment under no-till. In a two-year study, we evaluated six strategies for managing residue from warm-season annual grass on annual ryegrass establishment, forage production, and soil moisture. Treatments were (i) no herbicide, mow, and leave residue; (ii) tillage 30 and 7 d before planting ; (iii) apply glyphosate [isopropylamine salt of N-(phosphonomethyl)glycine] 30 d before planting, mow, and leave residue; (iv) apply glyphosate 7 d before planting, mow, and leave residue; (v) apply glyphosate 7 d before planting, apply additional residue from twice the plot area (i.e., three times the other residue treatments); and (vi) apply glyphosate 7 d before planting, burn residue 1 d before planting. Better stands and more forage production at first harvest of annual ryegrass were obtained by spraying and burning residue (two-year average of 96% stand and 0.92 Mg ha -1 yield at the first harvest) or spraying 30 d before planting (92% stand. 0.92 Mg ha 1 ) than when annual ryegrass was planted into a 3 x residue (55% stand, 0.24 Mg ha '). Soil moisture at planting did not cause differences in stand establishment among treatments. We conclude that managing residue during no-till establishment by controlling warm-season annual grasses and burning or controlling warm-season annual grasses 30 d before planting can improve stands and forage production of annual ryegrass.
Databáze: OpenAIRE
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