5th UF Water Institute Symposium Abstract

Submitter's Name Maria I. Zamora Re
Session Name Poster Session - Water & Nutrients in Managed Landscapes
Poster Number 55
Author(s) Maria Zamora,  Agricultural and Biological Engineering, University of Florida (Presenting Author)
  Michael D. Dukes,  Professor and Irrigation Specialist, Agricultural and Biological Engineering, University of Florida
  Evaluation of irrigation and nutrient Best Management Practices (BMPs) in the springsheds of Suwannee River Water Management District
  The perception of guaranteeing maximum yield through excessive application of water and fertilizer has become a major environmental issue, since nitrate leaching is one of the major contributors of worldwide groundwater contamination. In response to this concern, a three-year research project is being performed to quantify the impacts of nutrient and irrigation management practices on a corn-peanut rotation production in springsheds of the Suwannee River Water Management District. The experimental design includes four replicate plots for each treatment, totaling 60 plots per crop. Five irrigation treatments: (I1) calendar based-simulates grower’s irrigation practices; (I2) SWB: irrigation calculated using a soil water balance; (I3) SMS: used soil moisture sensors to refill in real-time the soil profile with irrigation; (I4) Reduced: applied 60% irrigation of I1 and (I5) no irrigation, were evaluated. Three nitrogen (N) fertility levels (lbs/ac): low (140), medium (220) and high (300) rates were evaluated in corn only. Drainage lysimeters were used to evaluate nutrient leaching volume and quality (N03 and NH4). As well, soil core depths were taken biweekly for nutrient leaching. Plant tissue samples were taken for N uptake of the crop over time.