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51753

IMPROVING YIELD AND FRUIT QUALITY OF WASHINGTON NAVEL ORANGE USING FOLIAR APPLICATIONS OF SOME NATURAL BIOSTIMULANTS.

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Last updated: 22 Jan 2023

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Abstract

Field experiment was carried out during two successive seasons of 2012 and 2013 on Washington Navel sweet orange cultivar (Citrus sinemsis, L) onto sour orange rootstock (C. aurantium , L) grown in well drainage clay loam soil of a commercial orchard located in Shiwah Valley (30°51'55.78"N, 31°16'23.14"E), near Aga city, Dakahleia Governorate, Egypt. The investigation was designed to throw some light on the effect of two natural biostimulants, i.e.,  Milagrow at 10, 15 and 20 ppm (extracted from pollen grains of rape seed (Brassica napus) as a source of brassinolide phytohormone) and yeast extract at 1000, 1500 and 2000 ppm on fruit set, fruit drop, yield and fruit quality of Washington Navel orange trees. The natural biostimulants were tested as foliar sprays at full bloom stage and one month later. Data indicated that, all biostimulants treatments increased fruit set, yield and fruit quality and decreased fruit drop as compared with control treatment. Data also revealed that, foliar sprays of trees by  Milagrow at 15 and 20 ppm were superior for inducing the highest increase of fruit set and yield, in addition yeast extract at 2000 ppm comparing with rest concentrations of both tested biostimulants. On the other hand, no significant differences were observed among all tested concentrations of two natural biostimulants with respect to fruit weight in two seasons. The foliar applications of  Milagrow and/or yeast extract increased fruit SSC and reduced acidity contents in fruit juice as compared with control treatment. Moreover, it was noticed that trees sprayed with two tested biostimulants gave the best results for reducing fruit drop. It could be recommended that best treatment for increasing yield and improving fruit quality was spraying Washington Navel sweet orange cultivar with  Milagrow at  20 ppm and yeast extract  at 2000 ppm during full bloom stage and one month later  especially in the same conditions to experimental area. 

DOI

10.21608/jpp.2015.51753

Keywords

Washington Navel orange, brassinolide, yeast extract, yield, fruit quality

Authors

First Name

M.

Last Name

El-Boray

MiddleName

S.

Affiliation

Pomology Dept., Fac.Agric., Mans. Univ., Egypt.

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First Name

M.

Last Name

Mostafa

MiddleName

F. M.

Affiliation

Pomology Dept., Fac.Agric., Mans. Univ., Egypt.

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City

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Orcid

-

First Name

S.

Last Name

Salem

MiddleName

E.

Affiliation

Citrus Res. Dept., Hort. Res. Inst., Agric. Res. Center, Giza, Egypt.

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City

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Orcid

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First Name

O.A.O.

Last Name

El - Sawwah

MiddleName

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Affiliation

Citrus Res. Dept., Hort. Res. Inst., Agric. Res. Center, Giza, Egypt.

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Volume

6

Article Issue

8

Related Issue

7976

Issue Date

2015-08-01

Receive Date

2019-10-02

Publish Date

2015-08-01

Page Start

1,317

Page End

1,332

Print ISSN

2090-3669

Online ISSN

2090-374X

Link

https://jpp.journals.ekb.eg/article_51753.html

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https://jpp.journals.ekb.eg/service?article_code=51753

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4

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Original Article

Type Code

887

Publication Type

Journal

Publication Title

Journal of Plant Production

Publication Link

https://jpp.journals.ekb.eg/

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Article

Created At

22 Jan 2023