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Dr. Sherif Fathy Eid El-Sayed El-Gioushy :: Publications:

Title:
Effectiveness of Different NPK Fertilization Sources on Growth, Nutritional Status, Productivity and Fruit Quality of Washington Navel Orange Trees
Authors: S.F. El-Gioushy and Mohamed A. Eissa
Year: 2019
Keywords: Washington Navel Orange Bio- NPK Organic N PK raw mineral Productivity Fruit Quality
Journal: Journal of Horticultural Science & Ornamental Plants
Volume: 11
Issue: 2
Pages: 134-143
Publisher: © IDOSI Publications, 2019
Local/International: International
Paper Link: Not Available
Full paper Sherif Fathy Eid El-Sayed El-Gioushy_Effectiveness of Different NPK Fertilization Sources on 2019.pdf
Supplementary materials Not Available
Abstract:

This study was conducted during 2016 & 2017 seasons on 13-year-old Washington navel orange trees budded on Sour orange rootstock planted at 5 x 5 meters apart under surface irrigation in a private orchard at Manzala village, Toukh region, Qalubia Governorate, Egypt. The main goal of this investigation was directed towards increasing Washington navel orange trees growth, nutritional status, productivity and fruit quality associated with lowering its production cost through minimizing of chemical NPK fertilizers by granulated organic NPK, natural raw rocky materials and biofertilizers. The experiment included seven treatments; T1-100% of chemical NPK, T2 - 100% of natural alternative NPK fertilizations mixture, T3 - 100% of NPK bio-fertilizations mixture, T4– 50% of NPK bio-fertilizations mixture + 50% of natural alternative NPK fertilizations mixture., T5 - 50% of chemical NPK + 50% of natural alternative NPK fertilizations mixture, T6 - 50% of chemical NPK + 50% of NPK bio-fertilizations mixture and T7- 33.3% of chemical NPK + 33.3% of NPK bio-fertilizations mixture + 33.3% of natural alternative NPK fertilizations mixture. Obtained results revealed that all investigated treatments increased growth parameters (number, length, thickness of developed shoots, number of leaves/each and leaf area), as well as total leaf chlorophyll and nutritional status (leaf N, P, K, Ca, Mg, Fe, Mn and Zn) and positively responded fruit (set% and retention%), yield/tree and fruit quality were also improved. However, T1-100% of chemical NPK and T7- 33.3% of chemical NPK + 33.3% of NPK bio-fertilizations mixture + 33.3% of natural alternative NPK fertilizations mixture were statistically the superior. Moreover, T6 - 50% of chemical NPK + 50% of NPK bio-fertilizations mixture ranked statistically second in this concern.

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