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 (N 1 ) as the control or untreated trees and other trees were treated with four treatments of different addition times of nitrogen soil fertilization (N 2 , N 3 , N 4 and N 5 ) 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 (NH 4 No 3 ) 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 N 2 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.
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Claims 4
Claim · model-written summary
Nitrogen application timing and boron and zinc sprays significantly improved pollen germination and fruit set against untreated trees.
- Taxon
- avocado trees (Persea americana Mill.)
Persea americanae0 - Treatment
- nitrogen soil application time and boron and zinc foliar sprayinge1
- Outcome
- Pollen germination, fruit sete1
- Direction
- improvinge1
- Comparator
- control treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“avocado trees (Persea americana Mill.)”
e1“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.”
Claim · model-written summary
Nitrogen timing and boron and zinc sprays significantly improved yield, fruit weight and flesh weight versus controls.
- Taxon
- avocado trees (Persea americana Mill.)Persea americanae0
- Treatment
- nitrogen soil application time and boron and zinc foliar sprayinge1
- Outcome
- yield, fruit weight, flesh weighte1
- Direction
- improvinge1
- Comparator
- control treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“avocado trees (Persea americana Mill.)”
e1“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.”
Claim · model-written summary
Nitrogen timing and boron and zinc sprays significantly improved oil content percentage and vitamin C versus controls.
- Taxon
- avocado trees (Persea americana Mill.)Persea americanae0
- Treatment
- nitrogen soil application time and boron and zinc foliar sprayinge1
- Outcome
- oil content percentage and vitamin Ce1
- Direction
- improvinge1
- Comparator
- control treese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“avocado trees (Persea americana Mill.)”
e1“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.”
Claim · model-written summary
N 2 nitrogen timing with combined boron and zinc at 1g/L/tree yielded the highest tested parameter values across both seasons.
- Taxon
- avocado trees (Persea americana Mill.)Persea americanae0
- Treatment
- nitrogen soil application time N 2 with boron and zinc combination at 1g/L/treee1
- Outcome
- highest valuese1
- Direction
- higheste1
- Qualifier
- both seasons of studye1
- Comparator
- other treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“avocado trees (Persea americana Mill.)”
e1“nitrogen soil application time N 2 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.”
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