Abstract
Core Ideas Deep band P is a potential strategy to reduce P losses by runoff. Deep band P improve soil fertility in subsurface in no‐till system. Greater amount of P removed with grain compared to the total P input. Phosphorus fertilizer placement can have significant agronomic and environmental implications in long‐term no‐till (NT) systems. The objective of this study was to evaluate soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies under long‐term NT management. A field study was performed near Nao‐Me‐Toque‐RS (Location 1) and Sao Sepe‐RS (Location 2), southern Brazil, during the 2014/2015 growing season. The experimental design was a randomized complete block with three replications. Triple superphosphate was applied using five strategies: (i) strip tillage with deep band (ST‐DB); (ii) strip tillage with band‐applied 5 by 5 cm (ST‐B); (iii) no‐till with broadcast (NT‐BR); (iv) no‐till with band‐applied 5 by 5 cm (NT‐B); (v) and no‐till with surface band (NT‐SB). Plant height, dry weight, and P uptake were evaluated at 20, 40, 60, and 80 d after emergence (DAE) as well as P removed and grain yield at harvest. The ST‐B application promoted greater plant height, dry weight, and P uptake at 80 DAE. However, ST‐DB showed the greatest P removal compared to other treatments. Also, greater yields were obtained for ST‐DB and NT‐BR. Soil sampling after harvest showed that ST‐DB increased soil test P levels by 19 and 11% at the 15‐ to 25‐cm layer for Locations 1 and 2, respectively. While NT‐BR increased soil test P by 43 and 36% at the 0‐ to 5‐cm layer for Locations 1 and 2, respectively. Deep band P fertilizer placement maintained or increased soybean yield and P use under long‐term NT in tropical soils.
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Claims 9
Claim · model-written summary
ST-B promoted greater plant height, dry weight, and P uptake at 80 DAE.
- Taxon
- soybean
Glycine maxe1 - Organ / stage
- 80 DAEe0
- Treatment
- ST‐Be0
- Outcome
- plant height, dry weight, and P uptakee0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ST‐B application promoted greater plant height, dry weight, and P uptake at 80 DAE.”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
ST-DB had the greatest P removal among treatments.
- Taxon
- soybeanGlycine maxe1
- Treatment
- ST‐DBe0
- Outcome
- P removale0
- Direction
- greateste0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ST‐DB showed the greatest P removal compared to other treatments.”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
ST-DB produced greater yields.
- Taxon
- soybeanGlycine maxe1
- Treatment
- ST‐DBe0
- Outcome
- yieldse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater yields were obtained for ST‐DB and NT‐BR”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
NT-BR produced greater yields.
- Taxon
- soybeanGlycine maxe1
- Treatment
- NT‐BRe0
- Outcome
- yieldse0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“greater yields were obtained for ST‐DB and NT‐BR”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
ST-DB increased soil test P by 19% at location 1.
- Taxon
- soybeanGlycine maxe1
- Treatment
- ST‐DBe0
- Outcome
- soil test P levelse0
- Direction
- increasede0
- Value
- 19e0
- Qualifier
- 15‐ to 25‐cm layere0
- Setting
- Locations 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ST‐DB increased soil test P levels by 19 and 11% at the 15‐ to 25‐cm layer for Locations 1 and 2, respectively”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
ST-DB increased soil test P by 11% at location 2.
- Taxon
- soybeanGlycine maxe1
- Treatment
- ST‐DBe0
- Outcome
- soil test P levelse0
- Direction
- increasede0
- Value
- 11%e0
- Qualifier
- 15‐ to 25‐cm layere0
- Setting
- Locations 1 and 2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ST‐DB increased soil test P levels by 19 and 11% at the 15‐ to 25‐cm layer for Locations 1 and 2, respectively”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
NT-BR increased soil test P by 43% at location 1.
- Taxon
- soybeanGlycine maxe1
- Treatment
- NT‐BRe0
- Outcome
- soil test Pe0
- Direction
- increasede0
- Value
- 43e0
- Qualifier
- 0‐ to 5‐cm layere0
- Setting
- Locations 1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT‐BR increased soil test P by 43 and 36% at the 0‐ to 5‐cm layer for Locations 1 and 2, respectively”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
NT-BR increased soil test P by 36% at location 2.
- Taxon
- soybeanGlycine maxe1
- Treatment
- NT‐BRe0
- Outcome
- soil test Pe0
- Direction
- increasede0
- Value
- 36%e0
- Qualifier
- 0‐ to 5‐cm layere0
- Setting
- Locations 1 and 2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NT‐BR increased soil test P by 43 and 36% at the 0‐ to 5‐cm layer for Locations 1 and 2, respectively”
e1“soybean [ Glycine max (L.) Merr.] response to P fertilizer placement strategies”
Claim · model-written summary
Deep band placement maintained or increased soybean yield and P use under long-term no-till.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Deep band P fertilizer placemente0
- Outcome
- soybean yield and P usee0
- Direction
- maintained or increasede0
- Setting
- tropical soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Deep band P fertilizer placement maintained or increased soybean yield and P use under long‐term NT in tropical soils.”
The same questions in other papers
tillage · yield · Glycine max (soybean)Positive and negative results
263 papers in the same direction as this paper · 100 in the opposite direction · 26 reporting no difference from an alternative
- no effect
- no effect
- no effect
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