Abstract
The reuse of organic byproducts in agroforestry systems is a sustainable proposal, since, in addition to preserving the natural resources, it has allowed the fertilization of the soils, obtaining a reduction of costs with mineral fertilizers. Therefore, the objective of this research was to evaluate the chemical attributes of the soil after two years of successive fertilizations using cattle manure and sewage sludge in agroforestry systems. The study was conducted in Goiânia, state of Goiás, Brazil. The experimental design used randomized blocks on a 2 x 4 factorial (cultivation systems and fertilizations), with four repetitions. The cultivation systems were: agroforestry and monoculture systems. The fertilizations used were: cattle manure, sewage sludge, mineral fertilizer and control (no fertilization). Regardless of the cultivation system, the fertilizations with sewage sludge increases the calcium, phosphor and zinc contents of the soil, as well as the pH values, sum of bases and cation exchange capacity, at 0-10cm depth. However, the potassium contents are lower in relation to the use of mineral fertilizers, both at 0 to 10 cm depth and at 0 to 20 cm. Teak plants in agroforestry systems presents similar heights to the monoculture plants, and they are higher on fertilizations with sewage sludge. The soybean grain productivity in the agroforestry system presents similar outputs in relation to the use of sewage sludge and mineral fertilizers. Therefore, it is recommended for farmers to adopt agroforestry systems and the organic fertilization practice with sewage sludge, associating the quality of the chemical attributes of the soil, the growth of forest species and soybean grain yields. Key words: Tectona grandis, sewage sludge, cattle manure, intercropping systems, soybeans.
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Claims 4
Claim · model-written summary
Soil potassium was lower with sewage sludge than with mineral fertilizer at both measured depths.
Not reportedTaxon
Verbatim
e0“However, the potassium contents are lower in relation to the use of mineral fertilizers, both at 0 to 10 cm depth and at 0 to 20 cm.”
e1“fertilizations with sewage sludge increases”
Claim · model-written summary
Teak height in agroforestry was similar to teak height in monoculture.
Verbatim
e0“Teak plants in agroforestry systems presents similar heights to the monoculture plants, and they are higher on fertilizations with sewage sludge.”
Claim · model-written summary
Soybean grain productivity in agroforestry was similar under sewage sludge and mineral fertilizer.
- Taxon
- soybean
Glycine maxe0 - Treatment
- sewage sludgee0
- Outcome
- grain productivitye0
- Direction
- similare0
- Comparator
- mineral fertilizerse0
- Setting
- agroforestry systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soybean grain productivity in the agroforestry system presents similar outputs in relation to the use of sewage sludge and mineral fertilizers.”
Claim · model-written summary
The authors recommend agroforestry and sewage sludge fertilization for farmers.
- Taxon
- soybeanGlycine maxe0
- Outcome
- adopt agroforestry systems and the organic fertilization practice with sewage sludgee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, it is recommended for farmers to adopt agroforestry systems and the organic fertilization practice with sewage sludge, associating the quality of the chemical attributes of the soil, the growth of forest species and soybean grain yields.”
The same questions in other papers
organic · yield · Glycine max (soybean)Results differ
10 papers in the same direction as this paper · 65 reporting no difference from an alternative
- positive
- positive
- positive
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See all 76 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.