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Article

Pre-Harvest Foliar Application of Mineral Nutrients to Retard Chlorophyll Degradation and Preserve Bio-Active Compounds in Broccoli

1
Vegetable Crops Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
2
Plant Physiology Department, Faculty of Agriculture, Cairo University, 12613 Giza, Egypt
3
Horticulture Department, Faculty of Agriculture, Kafrelsheikh University, 33511 Kafrelsheikh, Egypt
4
Natural Resources Institute, University of Greenwich, Chatham ME44TB, UK
*
Author to whom correspondence should be addressed.
Agronomy 2019, 9(11), 711; https://doi.org/10.3390/agronomy9110711
Received: 8 October 2019 / Revised: 21 October 2019 / Accepted: 22 October 2019 / Published: 3 November 2019
Foliar application of micronutrients has become a common farm management practice to increase the overall yield of various crops. However, the effects of foliar fertilization on shelf life and postharvest quality of the crops are rather under-researched. The aim of this field experiment was to evaluate the effect of foliar application of individual mineral nutrients (calcium (Ca), zinc (Zn), manganese (Mn), and iron (Fe) on pre and postharvest quality of broccoli. The broccoli plants were subjected to single foliar sprays of either Ca, Fe, Zn, or Mn, which was repeated four times during plant growth at a 1 g/kg concentration. Once harvested, the broccoli heads were refrigerated at 4 °C for 28 days. Our results indicated that foliar application of Ca, Zn, Mn, and Fe did not have a significant effect on plant growth parameters, apart from enhancing Soil Plant Analysis Development (SPAD) chlorophyll meter values. However, during postharvest, foliar application treatment showed a positive response on weight loss during storage and reduction in yellowing of the broccoli heads. Foliar treatments increased the concentration of Nitrogen (N), Phosphorus (P), Ca, Zn, Mn and Fe significantly in the broccoli head tissue. Total chlorophyll content, total phenolic compound, ascorbic acid, peroxidase activity, glucoraphanin and glucobrassicin and flavonoids were significantly increased by all foliar treatments. Crude protein content and sulforaphane were enhanced by Ca and Mn treatments. Overall, foliar application of the investigated mineral nutrients may prove beneficial in improving the shelf-life and nutrient content of broccoli during postharvest handling and storage. View Full-Text
Keywords: foliar application; mineral nutrients; Ca; plant growth; postharvest quality; chlorophyll foliar application; mineral nutrients; Ca; plant growth; postharvest quality; chlorophyll
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MDPI and ACS Style

El-Mogy, M.M.; Mahmoud, A.W.M.; El-Sawy, M.B.I.; Parmar, A. Pre-Harvest Foliar Application of Mineral Nutrients to Retard Chlorophyll Degradation and Preserve Bio-Active Compounds in Broccoli. Agronomy 2019, 9, 711. https://doi.org/10.3390/agronomy9110711

AMA Style

El-Mogy MM, Mahmoud AWM, El-Sawy MBI, Parmar A. Pre-Harvest Foliar Application of Mineral Nutrients to Retard Chlorophyll Degradation and Preserve Bio-Active Compounds in Broccoli. Agronomy. 2019; 9(11):711. https://doi.org/10.3390/agronomy9110711

Chicago/Turabian Style

El-Mogy, Mohamed M., Abdel W.M. Mahmoud, Mohamed B.I. El-Sawy, and Aditya Parmar. 2019. "Pre-Harvest Foliar Application of Mineral Nutrients to Retard Chlorophyll Degradation and Preserve Bio-Active Compounds in Broccoli" Agronomy 9, no. 11: 711. https://doi.org/10.3390/agronomy9110711

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