Amount of Rain Until Third Leaf Explain Differences in Irrigated Durum Wheat Yield Between a Conventional and No-Tillage System in a Long-Term Crop Rotation System in Mediterranean Environment
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Crop yields usually respond to crop rotation, but they may interact with tillage system and year (as an integration of variables, mainly in terms of temperature and precipitation). The objective of this study was to evaluate the determinants of the irrigated durum wheat yield under long-term tillage system × crop rotation (2000–2008). Tillage factor considered two levels: moldboard plow plus disk harrow (CT) and no-till (NT) and crop rotations factor had three levels: wheat–fallow–canola (W–F–C), wheat–maize (W–M) and wheat–fallow (W–F). Last year, we evaluate a maize crop as a physical soil quality indicator. The tillage system × crop rotation interaction was not significant, and the lowest durum wheat yield and biomass were observed in the W–M rotation experimental year (reduction of 18.7%). Tillage system × year interaction was significant for wheat yield. Partial least squares analysis indicated that precipitation was high between sowing and 3rd leaf was determinant for yield, and a negative correlation between these variables was observed. Despite the above, no differences were observed in the maize yield directly attributable to physical soil properties. Our study shows that rainfall distribution appears to cause of the tillage system × year interaction for durum wheat yield. When the precipitation was higher (160 mm) between sowing and 3rd leaf, yield decreased in NT by 37% compared to CT possible due to a hypoxia condition and/or low plant-available soil nitrogen, with a negative effect over tillering, affecting in the long-term spike number per square meter.
KeywordsFallow Surface stubble Hypoxia Water Rainfall distribution Tillering
The authors thank the National Fund for the Development of Science and Technology FONDECYT-Chile (Grant No. 1050565), the National Fund for the Promotion of Scientific and Technological Development FONDEF (No. D99I1081), for their financial support. We also thank Rosa Peralta and Marcelo Becerra for their help in managing and maintaining the trials.
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Apablaza, G. (1999). Patología de los cultivos, Epidemiología y control holístico. En: Ediciones Universidad Católica de Chile (p. 347).Google Scholar
- Balzarini, M., Bruno, C., & Arroyo, A. (2005). Análisis de Ensayos Agrícolas Multiambientales. Ejemplos en Info—Gen. (p. 141). Córdoba: Universidad Nacional de Córdoba.Google Scholar
- Di Rienzo, J., Casanoves, F., Balzarini, M., Gonzales, L., Tablada, M., & Robledo, C. (2010). Infostat. Grupo Infostat, FCA. Córdoba: Universidad Nacional de Córdoba.Google Scholar
- Hunt, J. R., Browne, C., McBeath, T. M., Verburg, K., Craig, S., & Whitbread, A. M. (2013). Summer fallow weed control and residue management impacts on winter crop yield though soil water and N accumulation in a winter-dominant, low rainfall region of southern Australia. Crop and Pasture Science,64, 922–934.CrossRefGoogle Scholar
- Neugschwandtner, R. W., Kaul, H., Liebhard, P., & Wagentrist, H. (2015). Winter wheat yields in a long-term tillage experiment under Pannonian climate conditions. Plant, Soil and Environment,61, 145–150.Google Scholar
- Rouanet, J. L., Acevedo, E., Mera, M., Silva, P., & Ferrada, S. (2005). Rotaciones de cultivos y sus beneficios para la agricultura del sur. Fundación Chile ( p.91).Google Scholar
- Soil Survey Staff. (2014). Keys to Soil Taxonomy (12th ed.). Washington, DC: USDA-Natural Resources Conservation Service.Google Scholar
- Uribe, J., Cabrera, R., de la Fuente, A., & Paneque, M. (2012). Atlas Bioclimático de Chile. In: M. Paneque (Ed.), Editorial Universidad de Chile, primera edición. ISBN: 978-956-19–0774-4.Google Scholar