Abstract
Core Ideas Soil changes induced by short‐term sugarcane straw removal did not influence the crop yield. The yield of sugarcane straw and stalk can be predicted using soil attributes under fields managed with straw removal. Meteorological conditions may alter the straw/stalk ratio and thus influence the sugarcane straw yield. Sugarcane ( Saccharum spp.) straw removal from the field has the potential to produce short‐term gains at the cost of long‐term sustainability. The objective of this study was (i) to develop a model capable to predict sugarcane yield (straw and stalk) by soil attributes and (ii) to discover why yields are minimally impacted following straw removal. In this 2‐yr experiment, the sugarcane straw removal effects on crop yields and soil attributes were investigated at two sites, Valparaíso and Capivari, in southeastern Brazil. Soil samples from the 0–5, 0–10, 0–20, and 0–30 cm were analyzed for C, N, Ca, Mg, P, K, pH, bulk density (BD), and soil penetration resistance (PR). The data were subjected to descriptive statistical, geostatistical, correlation and regression analyses. The findings showed that the straw and stalk yield can be predicted using soil attributes data at sites where the straw is removed. The best modeling coefficients for stalk yield were obtained using soil data from the 0–20 cm layer. The straw removal induced reduction in soil C, chemical and physical quality (0–5 cm) depending on site, but did not result in lower yields. The research findings provide important information that will lead to sustainable bioenergy production in Brazil.
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Claims 5
Claim · model-written summary
Sugarcane straw and stalk yield can be predicted from soil attributes at straw-removal sites.
Not reportedDirection
Verbatim
e1“The straw and stalk yield can be predicted using soil attributes data at sites where the straw is removed”
e0“Sugarcane ( Saccharum spp.) straw removal from the field”
Claim · model-written summary
The best modeling coefficients for stalk yield came from soil data in the 0–20 cm layer.
- Taxon
- Sugarcanee0
- Treatment
- soil data from the 0–20 cm layere2
- Outcome
- best modeling coefficients for stalk yielde2
Not reportedDirection
Verbatim
e2“The best modeling coefficients for stalk yield were obtained using soil data from the 0–20 cm layer”
e0“Sugarcane ( Saccharum spp.) straw removal from the field”
Claim · model-written summary
Straw removal reduced soil C and soil chemical and physical quality in the 0–5 cm layer, depending on site.
- Taxon
- Sugarcanee0
- Treatment
- straw removale3
- Outcome
- soil Ce3
- Direction
- reductione3
- Qualifier
- depending on sitee3
Not reportedComparator
Verbatim
e3“The straw removal induced reduction in soil C, chemical and physical quality (0–5 cm) depending on site”
e0“Sugarcane ( Saccharum spp.) straw removal from the field”
Claim · model-written summary
Sugarcane straw removal did not influence crop yield.
Not reportedComparator
Verbatim
e4“sugarcane straw removal did not influence the crop yield”
e0“Sugarcane ( Saccharum spp.) straw removal from the field”
Claim · model-written summary
Meteorological conditions may alter the straw/stalk ratio and so influence sugarcane straw yield (hypothesis).
Verbatim
e5“Meteorological conditions may alter the straw/stalk ratio and thus influence the sugarcane straw yield”
e0“Sugarcane ( Saccharum spp.) straw removal from the field”