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Título: | Cumulative and Residual Effects of Swine Slurry and Mineral Nitrogen in Irrigated Maize |
Autor: | Yagüe Carrasco, María Rosa; Quílez Sáez de Viteri, Dolores CSIC ORCID | Palabras clave: | Cumulative effects maize N use efficiency residual effect soil nitrate swine slurry |
Fecha de publicación: | nov-2010 | Editor: | American Society of Agronomy | Citación: | Yagüe MR, Quílez D. Cumulative and Residual Effects of Swine Slurry and Mineral Nitrogen in Irrigated Maize. Agronomy Journal 102 (6): 1682-1691 (2010) | Resumen: | Swine (Sus scrofa domesticus) slurry (SS) combined with mineral N fertilizers is a common fertilization practice in irrigated monoculture maize (Zea mays L.) in northeastern Spain. This study was designed to analyze the cumulative and residual response of sprinkler-irrigated maize to SS application. A 4-yr field experiment was setup with 16 treatments combining four SS rates between 30 and 120 Mg ha−1 and eight mineral N rates between 0 and 350 kg N ha−1 Maximum yields (10.2–11.7 Mg ha−1) and also critical rate of N fertilization (0 −179 kg N ha−1) varied between years. Application of 30 Mg SS ha−1 at presowing complemented with 175 kg mineral N ha−1 at side-dressing was the sole SS treatment reaching maximum yield for all years. Significant precipitation in spring 2003 (119 mm) leached the applied N at sowing and maize responded only to the N applied at side-dressing. The 4-yr average maximum N fertilization rate that does not promote soil nitrate accumulation was established at 134 kg N ha−1 yr−1 Two years after the last SS application maize yield (average 5.7 Mg ha−1) did not differ from the control treatment (6.3 Mg ha−1); that is, no residual effects were detected 2 yr after SS application. The best maize N fertilization strategy was the application before sowing of a low SS rate that would cover the whole maize PK needs and initial N needs (30 Mg ha−1 of fattening farm SS), complemented with the required amounts of mineral N at side-dressing. | Descripción: | 10 Pag., 4 Tabl., 5 Fig. | Versión del editor: | http://dx.doi.org/10.2134/agronj2010.0282 | URI: | http://hdl.handle.net/10261/29289 | DOI: | 10.2134/agronj2010.0282 | ISSN: | 0002-1962 |
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