Short-term Response of Greenhouse Gas Emissions from Precision Fertilization on Barley
نویسندگان
چکیده
Precision fertilization is a promising mitigation strategy to reduce environmental impacts of N-fertilization, but the effective benefits variable-rate have not yet been fully demonstrated. We evaluated short-term response (23 days) GHGs emissions following on barley. Yields, biomass (grains + straw) and different N-use indicators (N uptake, grain protein concentration, recovery efficiency, physiological partial factor productivity applied nutrient, agronomic efficiency N surplus) were compared. Four treatments performed: (i) conventional– 150 kg ha−1; (ii) variable with granular fertilizer; (iii) foliar liquid supplement; (iv) no fertilization. According proximal sensing analysis (Greenseeker Handheld) crop needs, both accounted for 35 ha−1. Cumulative significantly different, leading conclusion that sensor-based application might be in current experimental conditions. Results showed site-specific fertilizations ensured maintenance high yields significant rate reduction (approximately by 75%) use improvement. Variable-rate fertilization, due similar (~6 tons ha−1) than conventional higher content treatment (14%), confirms its effectiveness manage during later phases growing season.
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ژورنال
عنوان ژورنال: Agronomy
سال: 2022
ISSN: ['2156-3276', '0065-4663']
DOI: https://doi.org/10.3390/agronomy13010096