Nitrogen fertilisation of irrigated maize under Mediterranean conditions |
| |
| Authors: | P Berenguer F Santiveri J Boixadera J Lloveras |
| |
| Institution: | 1. Centre Universitat de Lleida (UdL)-IRTA, Av. Rovira Roure, 191, 25198 Lleida, Spain;2. Departament d’Enginyeria Agroalimentària i Biotecnologia, Escola Superior d’Agricultura de Barcelona, Universitat Politècnica de Catalunya, Campus del Baix Llobregat UPC, Av. del Canal Olímpic, 15, 08860 Castelldefels, Barcelona, Spain;3. Secció d’Avaluació de Recursos Agraris, Departament d’Agricultura, Alimentació i Acció Rural, Generalitat de Catalunya, Av. Rovira Roure, 191, 25198 Lleida, Spain;1. State Key Lab of Plant Physiology and Biochemistry, Engineering Research Center of Plant Growth Regulator, Ministry of Education, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;2. Department of Agronomy, Iowa State University, Ames, IA 50011, USA;1. INTA EEA Paraná, Ruta11, km12.5, 3100 Paraná, Argentina;2. FCA (UNER), Ruta11, km10, 3100 Paraná, Argentina;3. South Australian Research and Development Institute, Australia;1. West Central Research and Extension Center, University of Nebraska–Lincoln, North Platte, NE, 69101, United States;2. Department of Agronomy, University of Wisconsin–Madison, Madison, WI, 53706, United States;1. Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China;2. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Frederiksberg C, Denmark;3. Institute of Meteorology and Climate Research Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany;1. Agronomy Department, Purdue University, West Lafayette, IN 47907, USA;2. AgMaize Modeling Project, The Climate Corporation, Research Triangle Park, Raleigh-Durham, NC 27709, USA;1. Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB, Universidade de Trás-os-Montes e Alto Douro, UTAD, 5000-801, Vila Real, Portugal;2. Group Horticulture and Product Physiology, 6700 AA Wageningen University, The Netherlands |
| |
| Abstract: | Nitrogen fertilisation of maize (Zea mays L.) has become an important economic and environmental issue, especially in high-yielding irrigated Mediterranean areas. Producers have traditionally applied more N fertiliser than required and, as a result, some environmental problems have appeared in recent decades. A 4-year study (2002–2005) was conducted and six N rates (0, 100, 150, 200, 250 and 300 kg N ha?1 year?1) were compared. Before planting 50 kg N ha?1 were applied. The rest of the N was applied in two sidedresses, the first at V3–V4 developing stage and the second at V5–V6. Yield, biomass, grain N uptake, plant N uptake and SPAD-units were greatly influenced by both N fertilisation rate and soil NO3?-N content before planting and fertilising Nini (0–90 cm)]. At the beginning of the experiment, Nini was very high (290 kg NO3?-N ha?1) and there was therefore no yield response to N fertilisation in 2002. In 2003, 2004 and 2005, maximum grain yields were achieved with 96, 153 and 159 kg N ha?1, respectively. Results showed that N fertilisation recommendations based only on plant N uptake were not correct and that Nini should always be taken into account. On the other hand, the minimum amount of N available for the crop N applied with fertilisation plus Nini (0–90 cm)] necessary to achieve maximum grain yields was 258 kg N ha?1. This value was similar to plant N uptake, suggesting that available N was able to predict N maize requirements and could be an interesting tool for improving maize N fertilisation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
