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Crop Science Abstract -

Tillage and Nitrogen Source Effects on Growth, Yield, and Quality of Forage Maize


This article in CS

  1. Vol. 33 No. 6, p. 1316-1321
    Received: Dec 22, 1992

    * Corresponding author(s):
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  1. D. F. Mataruka,
  2. W. J. Cox ,
  3. J. Mt. Pleasant,
  4. H. M. van Es,
  5. S. D. Klausner and
  6. R. W. Zobel
  1. D pto. Bilogia Vegetal, E. U. Politecnica, 04071- ALMERIA, Spain
    U SDA-ARS, 1017 Bradfield Hall, Cornell Univ., Ithaca, New York, 14853



Manure has not been evaluated as an N source for maize (Zea mays L.) production underidge tillage (RT). A 2-yr field study was conducted on a Kendaia-Lima silt loam (fine-loamy, mixed, nonacid, mesic Aeric Haplaquept) to evaluate growth, yield, and quality of forage maize under moldboard plow (MP) and RT with fertilizer N (MPF and RTF) or with manure and supplemental fertilizer N (MPM and RTM, respectively). Soil water pressure and leaf carbon exchange rates (CER) were measured frequently; and plant N concentration, leaf area index (LAI), and dry matter (DM) accumulation were sured at the six-leaf stage (V6), silking (R1), and harvest. The treatment generally had lower CER from V5 to V8, lower whole-plant N concentrations at V6 in 1989 (24.7 g kg−1) and 1990 (28.2 g kg−1), and lower LAI and DM accumulation at V6 (0.39 and 37 gm−2) and R1 (3.27 and 844 gm−2, respectively) in 1989. In contrast, RTM compared to MPF and RTF had similar CER, whole-plant N concentrations, LAI and DM accumulation on most measurement dates. The MPM treatment compared to MPF, RTF, and RTM had lower DM yields (13.6, 16.3, 15.7, and 14.9 Mg ha−1) and whole-plant N concentrations (7.8, 8.5, 8.5, and 8.4 g kg−1) in 1989, and lower DM yields (13.7, 15.3, 15.0, and 15.9 Mg ha−1, respectively) in 1990. Surface application of manure before planting with supplemental fertilizer N at V5 was a viable N management system for forage maize under RT.

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