Abstract
This research was conducted on avocado trees (Persea americana, Mill.) “Hass” cv. during 2020/2021 seasons in a private orchard located at El-Nubaria region, El-Beheira Governorate, Egypt. It was an attempt to substitute chemical fertilizers (CF) such as N, P, K and Mg with organic fertilizers such as compost (COM) and natural fertilizer sources (NFS) followed by a study of its impact on vegetative growth, yield, fruit quality, and nutritional status. Organic fertilizer was used alone or in combination with CF to fulfill the requirements of each tree. It contains an identical amount of compost (20 kg/tree) in combination with four levels of NFS to cover 100%, 75%, 50% and 25% of the tree's requirements. Considering that, the natural fertilizer sources (NFS) were granulated organic N fertilizer and natural raw rocky materials for P, K and Mg. The previous treatments were compared with 100% mineral recommended doses of N, P, K and Mg (control). Results indicated that mineral fertilization significantly improved values of all tested properties compared with all treatments in both seasons of the study with no significant differences between it and 50% organic fertilizer (20kg COM+NFS) + 50% CF treatment in the 2nd season with regard to the following traits (shoot length, shoot number/branch, fruit weight and pulp weight).
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Claims 3
Claim · model-written summary
Full mineral fertilization significantly improved all tested avocado properties compared with the other treatments in both seasons.
- Taxon
- avocado trees
Persea americanat0 - Treatment
- mineral fertilizatione0
- Outcome
- all tested propertiese0
- Direction
- improvede0
- Qualifier
- both seasons of the studye0
- Comparator
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mineral fertilization significantly improved values of all tested properties compared with all treatments in both seasons of the study”
t0“Reducing chemical fertilizers partially by using natural alternative sources of organic fertilizers and its impact on “Hass” avocado trees.”
Claim · model-written summary
In the second season, full mineral fertilization and the half organic plus half chemical treatment did not differ significantly for shoot length and shoot number per branch.
- Taxon
- avocado treesPersea americanat0
- Treatment
- 50% organic fertilizer (20kg COM+NFS) + 50% CF treatmente0
- Outcome
- shoot length, shoot number/branche0
- Direction
- no significant differencese0
- Qualifier
- 2nd seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences between it and 50% organic fertilizer (20kg COM+NFS) + 50% CF treatment in the 2nd season with regard to the following traits (shoot length, shoot number/branch, fruit weight and pulp weight)”
t0“Reducing chemical fertilizers partially by using natural alternative sources of organic fertilizers and its impact on “Hass” avocado trees.”
Claim · model-written summary
In the second season, full mineral fertilization and the half organic plus half chemical treatment did not differ significantly for fruit weight and pulp weight.
- Taxon
- avocado treesPersea americanat0
- Treatment
- 50% organic fertilizer (20kg COM+NFS) + 50% CF treatmente0
- Outcome
- fruit weight and pulp weighte0
- Direction
- no significant differencese0
- Qualifier
- 2nd seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant differences between it and 50% organic fertilizer (20kg COM+NFS) + 50% CF treatment in the 2nd season with regard to the following traits (shoot length, shoot number/branch, fruit weight and pulp weight)”
t0“Reducing chemical fertilizers partially by using natural alternative sources of organic fertilizers and its impact on “Hass” avocado trees.”
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fertilization · growth · Persea americana (avocado)Positive and negative results
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See all 14 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.