Utility of the end-of-season nitrate test for nitrogen sufficiency of irrigated maize under Mediterranean semi-arid conditions
Fecha de publicación2015
Isla Climente, Ramón
Cavero Campo, José
MetadatosMostrar el registro completo del ítem
Calibration of decision tools to improve N fertilizer management is critical to increase its adoption by maize (Zea mays L.) growers. The objective of this study was to establish nitrate and total nitrogen concentrations in the basal maize stalks (BMS) at harvest to separate maize fields among three N availability categories (N-deficient, N-optimum, and N-excess) under Mediterranean irrigated semiarid conditions. We analysed data from 26 irrigated maize trials conducted between 2001 and 2012. Trials included treatments receiving different N fertilizer rates and sources (mineral and organic), irrigation systems (flood, sprinkler) and soil types. The critical nitrate concentration in BMS to identify N-deficient plots (CNC L ) is affected by the irrigation system. The CNC L was lower under sprinkler irrigation (708 mg NO 3– –N/kg) than under flood irrigation (2205 mg NO 3– –N/kg), and the later presented a higher degree of uncertainty compared to sprinkler irrigated systems. The results showed the difficulty to identify the N-deficient plots with the BMS test and the higher sensibility of nitrate-N than total-N concentration in BMS to separate N-deficient from N-optimal plots. Under sprinkler irrigation, nitrate in BMS>1500 mg NO 3– –N/kg had a 85% probability of having received an excess of N. Considering economic net returns to N fertilization, the range of nitrate concentration in BMS that maximized profit under sprinkler-irrigated conditions was established between 1100 and 1700 mg NO 3– –N/kg. Results suggest that BMS test can be useful in detecting plots with an excess of N but considering irrigation efficiency is crucial for stablishing successful CNC thresholds.
Es parte deSpanish Journal of Agricultural Research, 2015, vol. 13 núm. 1, p. 1-12
Proyectos de investigación europeos
El ítem tiene asociados los siguientes ficheros de licencia:
Showing items related by title, author, creator and subject.
Fertilization scenarios in sprinkler irrigated corn under Mediterranean conditions: effects on greenhouse gas emissions Álvaro-Fuentes, Jorge; Arrúe, José Luis; Cantero-Martínez, Carlos; Isla Climente, Ramón; Plaza Bonilla, Daniel; Quílez, Dolores (Soil Science Society of America, 2016)Agricultural soils emit greenhouse gases (GHG). Excessive application of N fertilizer may lead to the accumulation of mineral N in the soil, which is susceptible to loss to the environment. The objective of this study was ...
Tillage and irrigation system effects on soil carbon dioxide (CO2) and methane (CH4) emissions in a maize monoculture under Mediterranean conditions Franco-Luesma, Samuel; Cavero Campo, José; Plaza Bonilla, Daniel; Cantero-Martínez, Carlos; Arrúe, José Luis; Álvaro-Fuentes, Jorge (Elsevier, 2019-11-11)Irrigation as well as soil tillage management are considered two possible strategies to reduce carbon dioxide (CO2) and methane (CH4) emissions from the soil in Mediterranean agroecosystems. The objective of this work was ...
Influence of irrigation time and frequency on greenhouse gas emissions in a solid-set sprinkler-irrigated maize under Mediterranean conditions Franco-Luesma, Samuel; Álvaro-Fuentes, Jorge; Plaza Bonilla, Daniel; Arrúe, José Luis; Cantero-Martínez, Carlos; Cavero Campo, José (Elsevier, 2019-03-26)Irrigation management may influence soil greenhouse gas emissions (GHG). Solid-set sprinkler irrigation systems allow to modify the irrigation time and frequency. The objective of this study was to quantify the effect of ...