Abstract
Modern Concepts & Developments in Agronomy Stable Isotope Analysis as a Tool to Determine Nitrogen Fertilizer Source JMarlee A Trandel1*, Penelope Perkins Veazie1 and S Alan Walters2 1Department of Horticultural, USA 2Department of Plant, Soil, and Agricultural Systems, USA *Corresponding author: Marlee A Trandel, 600 Laureate Way, Plants for Human Health Institute, Department of Horticultural Sciences, North Carolina State University, Kannapolis, NC 28081, USA Submission: August 02, 2019;Published: August 22, 2019 DOI: 10.31031/MCDA.2019.05.000603 ISSN 2637-7659Volume5 Issue1
Highlights
Nitrogen is critical for vegetable crops to maximize productivity, and the assimilation of this nutrient by plants is important because it directly influences plant growth, development and stable N isotopic patterns
Fingerprinting crops to detect organic or inorganic fertilizer use can be done by determining nitrogen (N) stable isotope values
A greenhouse experiment was conducted with ‘Better Bush’ tomatoes using four soil fertility treatments consisting of a) inorganic fertilization [Miracle Grow®; 24N-4P-13K], b) organic fertilization [bonemeal (6N-8P-0K), bloodmeal (12N-0P-0K), liquid Earth juice (2N-1P-1K) and 25% vermicompost]; c) mixed fertilization [Miracle Grow® with 25% vermicompost] and d) control [no fertilization]
Summary
Nitrogen is critical for vegetable crops to maximize productivity, and the assimilation of this nutrient by plants is important because it directly influences plant growth, development and stable N isotopic patterns. Nitrogen fractionates into the stable isotopes of either 14N or 15N, and often depends on the fertilizer source applied to the soil [1,2] These fractionation events will provide differences in plant isotopic responses which are directly influenced by inorganic or organic fertilizers. More research is needed to gain a better understanding of 15N/14N isotopic ratios in various vegetable crops grown under different fertilization systems. This information will potentially benefit the organic industry by giving an accurate assessment regarding if the appropriate nitrogen fertilization systems were utilized during production. A stable N isotope study was initiated to determine the effect of various N fertilizer regimes on tomatoes, since this crop is a heavy nutrient feeder and requires large amounts of N to maximize fruit yields
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