Abstract
The response of crops to the application of biofertilizers in the soil is not yet well established. Therefore, we carried out this study with the objective of evaluating the productive potential of maize fertilized with doses of sewage sludge, comparing with the use of mineral fertilizer over four agricultural seasons. The experiment was conducted in a Red Dystroferric Nitosol (Ultisol) in a randomized block design and repeated measures in time. The treatments consisted of five doses of sewage sludge and one treatment using nitrogen, phosphorus and potassium in formulation. All fertilizations were carried out at maize sowing at four planting times (summer and 2nd crop of 1st agricultural year and, summer and 2nd crop of 2nd agricultural year) and replicates. The results showed a cumulative increase in the P, Ca, Mg and Zn leaf concentrations over the four seasons crops, when the sewage sludge was used in the 30 and 40 Mg ha-1 doses. However, reductions in plant height, weight and maize cob diameter, mass and grain yield were observed at the end of the last harvest. The treated sewage sludge is a viable alternative for maize fertilization in the first harvest, provides increases in grain yield in the order of 1.35 Mg ha-1 and can be recommended instead of NPK mineral fertilizers in built-up fertility soils.
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Claims 6
Claim · model-written summary
Sewage sludge at 30 and 40 Mg ha-1 cumulatively increased leaf P, Ca, Mg and Zn concentrations over four seasons of maize.
- Organ / stage
- leafe1
- Treatment
- sewage sludgee1
- Outcome
- P, Ca, Mg and Zn leaf concentrationse1
- Direction
- increasee1
- Comparator
- mineral fertilizere2
- Setting
- four agricultural seasonse2
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed a cumulative increase in the P, Ca, Mg and Zn leaf concentrations over the four seasons crops, when the sewage sludge was used in the 30 and 40 Mg ha-1 doses”
e2“evaluating the productive potential of maize fertilized with doses of sewage sludge, comparing with the use of mineral fertilizer over four agricultural seasons”
Claim · model-written summary
Sewage sludge fertilization reduced maize plant height and weight at the end of the last harvest.
- Treatment
- sewage sludgee2
- Outcome
- plant height, weighte3
- Direction
- reductionse3
- Qualifier
- at the end of the last harveste3
- Comparator
- mineral fertilizere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“evaluating the productive potential of maize fertilized with doses of sewage sludge, comparing with the use of mineral fertilizer over four agricultural seasons”
e3“However, reductions in plant height, weight and maize cob diameter, mass and grain yield were observed at the end of the last harvest”
Claim · model-written summary
Sewage sludge fertilization reduced maize cob diameter, cob mass and grain yield at the end of the last harvest.
- Treatment
- sewage sludgee2
- Outcome
- cob diameter, mass and grain yielde3
- Direction
- reductionse3
- Qualifier
- at the end of the last harveste3
- Comparator
- mineral fertilizere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“evaluating the productive potential of maize fertilized with doses of sewage sludge, comparing with the use of mineral fertilizer over four agricultural seasons”
e3“However, reductions in plant height, weight and maize cob diameter, mass and grain yield were observed at the end of the last harvest”
Claim · model-written summary
The treated sewage sludge is a viable alternative for maize fertilization in the first harvest.
- Treatment
- treated sewage sludgee4
- Outcome
- viable alternative for maize fertilization in the first harveste4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The treated sewage sludge is a viable alternative for maize fertilization in the first harvest”
Claim · model-written summary
Treated sewage sludge can be recommended instead of NPK mineral fertilizers in built-up fertility soils.
- Treatment
- treated sewage sludgee4
- Outcome
- recommended instead of NPK mineral fertilizerse5
- Comparator
- NPK mineral fertilizerse5
- Setting
- built-up fertility soilse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The treated sewage sludge is a viable alternative for maize fertilization in the first harvest”
e5“can be recommended instead of NPK mineral fertilizers in built-up fertility soils”
Claim · model-written summary
Treated sewage sludge provided maize grain yield increases in the order of 1.35 Mg ha-1 in the first harvest.
- Treatment
- treated sewage sludgee4
- Outcome
- grain yielde6
- Direction
- increasese6
- Value
- 1.35 Mg ha-1e6
- Qualifier
- in the order ofe6
- Setting
- first harveste4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The treated sewage sludge is a viable alternative for maize fertilization in the first harvest”
e6“provides increases in grain yield in the order of 1.35 Mg ha-1”
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