Abstract
Melon is one of the most demanding cucurbits regarding fertilization, requiring knowledge of soils, crop nutritional requirements, time of application, and nutrient use efficiency for proper fertilization. Developing support systems for decision-making for fertilization that considers these variables in nutrient requirement and supply is necessary. The objective of this study was parameterization of a fertilizer recommendation system for melon (Ferticalc-melon) based on nutritional balance. To estimate fertilizer recommendation, the system considers the requirement subsystem (REQ), which includes the demand for nutrients by the plant, and the supply subsystem (SUP), which corresponds to the supply of nutrients through the soil and irrigation water. After determining the REQtotal and SUPtotal, the system calculates the nutrient balances for N, P, K, Ca, Mg, and S, recommending fertilizer application if the balance is negative (SUP < REQ), but not if the balance is positive or zero (SUP ≥ REQ). Simulations were made for different melon types (Yellow, Cantaloupe, Galia and Piel-de-sapo), with expected yield of 45 t ha-1. The system estimated that Galia type was the least demanding in P, while Piel-de-sapo was the most demanding. Cantaloupe was the least demanding for N and Ca, while the Yellow type required less K, Mg, and S. As compared to other fertilizer recommendation methods adopted in Brazil, the Ferticalc system was more dynamic and flexible. Although the system has shown satisfactory results, it needs to be evaluated under field conditions to improve its recommendations.
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Claims 6
Claim · model-written summary
Ferticalc recommends fertilizer for negative nutrient balances and none for positive or zero balances.
- Taxon
- MELON
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Cucumis melot0 - Outcome
- recommending fertilizer applicatione0
- Comparator
- balance is positive or zeroe0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“recommending fertilizer application if the balance is negative (SUP < REQ), but not if the balance is positive or zero (SUP ≥ REQ)”
t0“MELON”
Claim · model-written summary
Galia melon was least demanding in P while Piel-de-sapo was most demanding.
- Taxon
- MELONCucumis melot0
- Material
- Galiae0
- Outcome
- least demanding in Pe0
- Direction
- leaste0
- Comparator
- Piel-de-sapoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Galia type was the least demanding in P, while Piel-de-sapo was the most demanding”
t0“MELON”
Claim · model-written summary
Cantaloupe melon was least demanding for N and Ca.
- Taxon
- MELONCucumis melot0
- Material
- Cantaloupee0
- Outcome
- demanding for N and Cae0
- Direction
- leaste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cantaloupe was the least demanding for N and Ca”
t0“MELON”
Claim · model-written summary
Yellow melon required less K, Mg and S.
- Taxon
- MELONCucumis melot0
- Material
- Yellowe0
- Outcome
- required less K, Mg, and Se0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the Yellow type required less K, Mg, and S”
t0“MELON”
Claim · model-written summary
Ferticalc was more dynamic and flexible than other fertilizer recommendation methods used in Brazil.
- Outcome
- more dynamic and flexiblee0
- Comparator
- other fertilizer recommendation methodse0
- Setting
- Brazile0
Not reportedValue
Verbatim
e0“As compared to other fertilizer recommendation methods adopted in Brazil, the Ferticalc system was more dynamic and flexible.”
Claim · model-written summary
The system showed satisfactory results but needs field evaluation to improve recommendations.
- Taxon
- MELONCucumis melot0
- Outcome
- needs to be evaluated under field conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although the system has shown satisfactory results, it needs to be evaluated under field conditions to improve its recommendations.”
t0“MELON”