Paper · 2024 · Pesquisa Agropecuária Tropical

Alternative sources of phosphorus in beet production aiming at the organic system

Lucas Daniel Pimenta; Antonio Ismael Inacio Cardoso; Jolinda Mércia de Sá

3
claims
5
verbatim quotes
0
citations
1
research areas
✓
Open access · cc-by

Abstract

ABSTRACT The demand for beet produced in the organic system has increased. This study aimed to evaluate the beet production with the use of different proportions of phosphorus sources. A randomized block design was used. The treatments were established in a 6 x 2 + 1 factorial arrangement, corresponding to 6 proportions of the phosphorus fertilizers Yoorin® thermophosphate (YT) and bone meal (BM) (100 % of P2O5 with YT; 80 % of P2O5 with YT + 20 % of P2O5 with BM; 60 % of P2O5 with YT + 40 % with BM; 40 % of P2O5 with YT + 60 % with BM; 20 % of P2O5 with YT + 80 % with BM; and 100 % of P2O5 with BM), 2 doses of P2O5 (180 - recommended - and 360 kg ha-1) and 1 control without these phosphorus fertilizers. The plant height, number of leaves, root and shoot fresh and dry weight, transverse and longitudinal root diameter and total root yield were evaluated. The recommended fertilizer dose resulted in higher values, when compared to twice the recommendation. The proportion of 0 % of thermophosphate and 100 % of bone meal provided the highest mean values for the evaluated parameters. High phosphorus doses showed to be harmful to beet production.

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Claims 3

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The recommended phosphorus fertilizer dose gave higher beet values than twice the recommended dose.

Treatment
recommended fertilizer dosee1
Outcome
valuese1
Direction
highere1
Comparator
twice the recommendatione1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris
Beta vulgaris · TaxonMichael Bakker Paiva · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“The demand for beet produced in the organic system has increased”

✓ located verbatim in the source · abstract, characters 9–73 · show in text ↑
e1

“The recommended fertilizer dose resulted in higher values, when compared to twice the recommendation”

✓ located verbatim in the source · abstract, characters 866–966 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 100% bone meal phosphorus source (0% thermophosphate) gave the highest mean values for the evaluated beet parameters.

Treatment
100 % of bone meale2
Outcome
mean values for the evaluated parameterse2
Direction
higheste2

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris
Beta vulgaris · TaxonMichael Bakker Paiva · CC BY 4.0 · iNaturalist ↗

Verbatim

e0

“The demand for beet produced in the organic system has increased”

✓ located verbatim in the source · abstract, characters 9–73 · show in text ↑
e2

“The proportion of 0 % of thermophosphate and 100 % of bone meal provided the highest mean values for the evaluated parameters”

✓ located verbatim in the source · abstract, characters 968–1093 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

High phosphorus doses were harmful to beet production.

Treatment
High phosphorus dosese3
Outcome
beet productione3
Direction
decreaseinferrede3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Beta vulgaris
Beta vulgaris · TaxonMichael Bakker Paiva · CC BY 4.0 · iNaturalist ↗

Verbatim

e3

“High phosphorus doses showed to be harmful to beet production”

✓ located verbatim in the source · abstract, characters 1095–1156 · show in text ↑

phosphorus · yield · Beta vulgaris (beet)Results differ

38 papers: 30 positive, 8 negative or no effect

7 papers in the same direction as this paper · 30 in the opposite direction

  1. positive
  2. positive
  3. positive

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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.