Impact of Some Fertilization Treatments on Crop and It’s Atrebuites on “Fuerte” Avocado Trees

Volume 4 - Issue 5

Stino RG¹*, IE El Shenawy¹, HA Abdel Kareem² and Rania AE²

Received: September 14, 2018;   Published: September 24, 2018

DOI: 10.32474/CIACR.2018.04.000196

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Abstract

This study was carried out throughout two successive seasons 2015 and 2016 at Horticulture Research Station at El-Kanater El-Khayria, Qalyubeia Governorate on 20-year-old avocado trees (Persea americana Mill.) “Fuerte” cultivar grafted on Dayouk rootstock and irrigated with through farrow (surface) irrigation system. In this sequence (N₁) as the control or untreated trees and other trees were treated with four treatments of different addition times of nitrogen soil fertilization (N₂, N₃, N₄ and N₅) all only once and once with boron and zinc as foliar spraying in concentrations (1, 2 and 3 g/L) beside combination between them. Nitrogen fertilization rated 1200g /tree in 3 times as (NH₄No₃) 33. 5%. Boron was used as sulaphate boron (17, 5%) and zinc was used as sulphate zinc (34%) each treatment was sprayed independently or in combination three times during (October, January, April). Pollen germination, fruit set as well as yield, fruit weight, flesh weight, oil content percentage and vitamin C were determined to assess the effect of the treatments. The obtained results showed that nitrogen soil application time and boron and zinc foliar spraying were significantly affected on improving all the tested parameters compared with control trees. The study also showed that, nitrogen soil application time N₂ with boron and zinc combination at 1g/L/tree was more effective than the other treatments and gave significantly the highest values in comparison of other testes treatments in both seasons of study.

Keywords: Avocado; Fuerte; Nitrogen; Boron; Zinc, Foliar spraying; Application time; Fruit set; Fruit quality and oil content

Abstract| Introduction| Materials and Methods| Results and Discussion| In Conclusion the Present Study Clearly| As a Recommendation| References|