The impact of organic and mineral fertilizers on soil quality parameters and the productivity of irrigated maize crops in semiarid regions

Biau, A.; Santiveri, Francisca; Mijangos, Iker; Lloveras, J.

doi:10.1016/j.ejsobi.2012.08.008

Cited by 45 publications

(34 citation statements)

References 39 publications

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“…Soils were well-drained, had no salinity problems, and were characterized by the presence of a petrocalcic horizon at a depth of 80-100 cm, being classified as Petrocalcic Calcixerept [30]. The area has a semi-arid climate with a mean temperature of 19.1 • C and low precipitation during the maize growing season (192 mm) [31]. Irrigation is therefore required to achieve high grain yields.…”

Section: Study Areamentioning

confidence: 99%

“…Pig slurry (Ps) applications were done before sowing and the slurry was then ploughed into the soil between 3-5 hours after application to reduce ammonia (NH3) volatilization losses. Inorganic N fertilization (33.5% N, as ammonium nitrate) was applied by hand, in two equal parts: 50% at the first sidedress (stage V3-V4: 3-4 leaves with visible leaf collars) and 50% at the second sidedress (stage V6-V7: 6-7 leaves with visible leaf collars) [31]. In the case of the N400 treatment, a third sidedress was applied at stage V12 (when the UAV images were acquired).…”

Section: Fertilizer Treatmentsmentioning

confidence: 99%

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Analysis of Vegetation Indices to Determine Nitrogen Application and Yield Prediction in Maize (Zea mays L.) from a Standard UAV Service

et al. 2016

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Abstract:The growing use of commercial unmanned aerial vehicles (UAV) and the need to adjust N fertilization rates in maize (Zea mays L.) currently constitute a key research issue. In this study, different multispectral vegetation indices (green-band and red-band based indices), SPAD and crop height (derived from a multispectral compact camera mounted on a UAV) were analysed to predict grain yield and determine whether an additional sidedress application of N fertilizer was required just before flowering. Seven different inorganic N rates (0, 100, 150, 200, 250, 300, 400 kg·N·ha −1 ), two different pig slurry manure rates (Ps) (150 or 250 kg·N·ha −1 ) and four different inorganic-organic N combinations (N100Ps150, N100Ps250, N200Ps150, N200Ps250) were applied to maize experimental plots. The spectral index that best explained final grain yield for the N treatments was the Wide Dynamic Range Vegetation Index (WDRVI). It identified a key threshold above/below 250-300 kg·N·ha −1 . WDRVI, NDVI and crop height showed no significant response to extra N application at the economic optimum rate of fertilization (239.8 kg·N·ha −1 ), for which a grain yield of 16.12 Mg·ha −1 was obtained. This demonstrates their potential as yield predictors at V12 stage. Finally, a ranking of different vegetation indices and crop height is proposed to overcome the uncertainty associated with basing decisions on a single index.

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Section: Study Areamentioning

confidence: 99%

Section: Fertilizer Treatmentsmentioning

confidence: 99%

Analysis of Vegetation Indices to Determine Nitrogen Application and Yield Prediction in Maize (Zea mays L.) from a Standard UAV Service

et al. 2016

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“…Materials derived from organic residues, such as compost, can be considered as sources of plant nutrients, for partial substitution of synthetic fertilizers (Flotats et al, 2011;Brockmann et al, 2014), in accordance with the key principles of the Circular Economy (Bernal, 2017). Compost application to soil allows the recycling of nutrients in the soilplant system (Tiquia et al, 2002;Bernal et al, 2009a;Flotats et al, 2011), increasing biomass production and soil fertility by improving the physicochemical and biological properties of the soil (Keener et al, 2000;Loecke et al, 2004;Cordovil et al, 2007;Bedada et al, 2014) as well as nutrient availability (Tejada and Gonzalez, 2006;Biau et al, 2012). Simultaneously, composting provides an efficient and cost-effective way of recycling these materials (Arcadis, EUNOMIA Research & Consulting, 2010;Burgos et al, 2006).…”

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Composts Produced From Pig Slurry Solids: Nutrient Efficiency and N-Leaching Risks in Amended Soils

Santos

Fangueiro

Moral

et al. 2018

Front. Sustain. Food Syst.

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“…Previous studies in the area determined the need of 290 kg N available ha −1 (0-90 cm) to achieve maximum maize grain yields [8], with extractions up to 386 kg N ha −1 [58]. Then, the N400, and probably the N300 treatment, could provide enough N to cover maize's N requirements.…”

Section: Vegetation Indices Spad and Plant Height Responses To N Ratmentioning

confidence: 99%

Use of Multispectral Airborne Images to Improve In-Season Nitrogen Management, Predict Grain Yield and Estimate Economic Return of Maize in Irrigated High Yielding Environments

2018

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Vegetation indices (VIs) derived from active or passive sensors have been used for maize growth monitoring and real-time nitrogen (N) management at field scale. In the present multilocation two-year study, multispectral VIs (green-and red-based), chlorophyll meter (SPAD) and plant height (PltH) measured at V12-VT stage of maize development, were used to distinguish among the N status of maize, to predict grain yield and economic return in high yielding environments. Moreover, linear plateau-models were performed with VIs, SPAD and PltH measurements to determine the amount of N needed to achieve maximum maize grain yields and economic return. The available N in the topsoil (0-30 cm) was measured, and its relationship with VIs, maize yield and maize N requirements was analyzed. Green-based VIs were the most accurate indices to predict grain yield and to estimate the grain yield optimum N rate (GYON r ) (216.8 kg N ha −1 ), but underestimated the grain yield optimum N available (GYON a ) (248.6 kg N ha −1 ). Red-based VIs slightly overestimated the GYON r and GYON a , while SPAD highly underestimated both of them. The determination of the available N did not improve the accuracy of the VIs to determine the grain yield. The green chlorophyll index (GCI) distinguished maize that would yield less than 84% of the maximum yield, showing a high potential to detect and correct maize N deficiencies at V12 stage. The economic optimum nitrogen rate (EON r ) and economic optimum nitrogen available (EON a ) were determined below the GYON r and the GYON a , demonstrating that maximum grain yield strategies in maize are not normally the most profitable for farmers. Further research is needed to fine-tune the response of maize to N applications when deficiencies are detected at V12 stage, but airborne imagery could be useful for practical farming implementation in irrigated high yielding environments.

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The impact of organic and mineral fertilizers on soil quality parameters and the productivity of irrigated maize crops in semiarid regions

Cited by 45 publications

References 39 publications

Analysis of Vegetation Indices to Determine Nitrogen Application and Yield Prediction in Maize (Zea mays L.) from a Standard UAV Service

Analysis of Vegetation Indices to Determine Nitrogen Application and Yield Prediction in Maize (Zea mays L.) from a Standard UAV Service

Composts Produced From Pig Slurry Solids: Nutrient Efficiency and N-Leaching Risks in Amended Soils

Use of Multispectral Airborne Images to Improve In-Season Nitrogen Management, Predict Grain Yield and Estimate Economic Return of Maize in Irrigated High Yielding Environments

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