Evaluating sustainability of yield and fruit quality of sweet oranges with use of controlled release fertilizer and micronutrients

Evaluating sustainability of yield and fruit quality of sweet oranges with use of controlled release fertilizer and micronutrients

Report Date: 06/28/2020
Project: 18-061C   Year: 2020
Category: Horticultural & Management
Author: Tript Vashisth
Sponsor: Citrus Research and Development Foundation

his project is an continuation of an objective of existing CRDF funded project (# 00124558 ; ended in March 2019, final report submited to CRDF) with some added treatments to be evaluated in comparison to control (dry conventional fertilizer with foliar micronutrients).  Objective 1 which is the continuation of # 00124558 included 10 treatments. The added treatments from objective 21.         CRF + Tiger Micronutrients+ Mn 50%2.         CRF + Tiger Micronutrients+ Zn 50%3.         CRF + Tiger Micronutrients+ Fe 50%4.         CRF + Tiger Micronutrients+ B 50%5.         CRF + Tiger Micronutrients+ Mn +Zn 20%6.         CRF + Tiger Micronutrients+ Mn +Fe 20%7.         CRF + Tiger Micronutrients+ Zn +Fe 20%8.         CRF + Tiger Micronutrients+ Zn +B  20%9.         CRF + Tiger Micronutrients+ Fe + B 20%10.         CRF + Tiger Micronutrients+ Mn +Zn 50%11.         CRF + Tiger Micronutrients+ Mn +Fe 50%12.         CRF + Tiger Micronutrients+ Zn +Fe 50%13.         CRF + Tiger Micronutrients+ Zn +B  50%14.         CRF + Tiger Micronutrients+ Fe + B 50% The treatment for objective 3: 1.CRF + Foliar Micronutrients + Tiger 90; 2.CRF + Tiger MicronutrientsAltogether currently there are 25 treatments of citrus nutrition that are being compared to control. Within this quater the we succefully collected harvest data on all 25 treatments. In addition, we were able to collect fruit quality and size data on the harvested fruit. This data is currently being analyzed statistically.Unfortunately, we were not able to do sensory analysis due to Covid-19 related slowdown of UF activities. In order to compensate, we have made an effort to collect juice from all the treatments and freeze-store. We plan to conduct a flavor compound and sugar analysis on these samples in order to gain some insight. We plan to conduct a sensory analysis next year with freshly harvested fruit and run a flavor and sugar analysis on those to get two years replicated data on flavor of juice.


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