Abstract
Abstract Field experiments were conducted on calcareous and non‐calcareous Orthic Black Chemozemic soils over a five year period to study the effect of rates and placements of P‐fertilizer on Canadian rape (Brassica napus L. cv Tower) production. Six rates of P as mono‐ammonium phosphate (MAP) were applied at seeding using four placement methods: i) broadcast and cultivated 10 cm into the soil (BC); ii) banded in the seed row with the seed (PWS); iii) banded 2.5 below and 2.5 cm to the side of the seed (PSS); iv) banded 2.5 cm directly below the seed (PBS). Soil type had no significant effect on rape growth, seed yield and P‐uptake. Rape responded best to P‐fertilizer banded with (PWS) or near (PSS, PBS) the seed. But, placing 15 kg/ha P or greater with the seed reduced seedling emergence; with 25 kg P/ha insufficient plants emerged to justify harvesting. The reduced seedling emergence resulted in reduced seed yield and P‐uptake. Maximum yields were obtained when the fertilizer was banded 2.5 cm away from the seed (PSS, PBS). The BC method produced the least growth, yield and P‐uptake responses of the four methods. Only when broadcast rates of P were in excess of 10 kg/ha did rape dry matter, seed and P‐uptake increase. Banding 10 kg/ha with or near to the seed was equivalent to broadcasting 25 kg/ha in terms of seed yield and P‐uptake. Application of P fertilizer also increased seed protein and oil concentrations.
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Claims 10
Claim · model-written summary
Soil type did not significantly affect growth, yield or P uptake.
- Taxon
- rape
_Brassica_napus_-_Habit.jpg?width=60)
Brassica napuse0 - Outcome
- rape growth, seed yield and P‐uptakee0
- Direction
- no significant effecte0
- Setting
- Soil typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Brassica_napus_-_Habit.jpg?width=500)
Verbatim
e0“Soil type had no significant effect on rape growth, seed yield and P‐uptake.”
Claim · model-written summary
Rape responded best when P fertilizer was banded with or near the seed.
- Taxon
- RapeBrassica napuse0
- Treatment
- P‐fertilizer banded with (PWS) or near (PSS, PBS) the seede0
- Outcome
- responded beste0
- Direction
- beste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rape responded best to P‐fertilizer banded with (PWS) or near (PSS, PBS) the seed.”
Claim · model-written summary
At least 15 kg/ha P placed with seed reduced emergence.
- Taxon
- rapeBrassica napust0
- Treatment
- 15 kg/ha P or greater with the seede0
- Outcome
- seedling emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placing 15 kg/ha P or greater with the seed reduced seedling emergence”
t0“rape”
Claim · model-written summary
At 25 kg P/ha with seed, too few plants emerged to justify harvest.
- Taxon
- rapeBrassica napust0
- Outcome
- insufficient plants emergede0
- Value
- 25 kg P/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with 25 kg P/ha insufficient plants emerged to justify harvesting.”
t0“rape”
Claim · model-written summary
Reduced seedling emergence reduced seed yield and P uptake.
- Taxon
- rapeBrassica napust0
- Organ / stage
- seedlinge0
- Outcome
- seed yield and P‐uptakee0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduced seedling emergence resulted in reduced seed yield and P‐uptake.”
t0“rape”
Claim · model-written summary
Fertilizer banding 2.5 cm from the seed gave maximum yields.
- Taxon
- rapeBrassica napust0
- Treatment
- fertilizer was banded 2.5 cm away from the seed (PSS, PBS)e0
- Outcome
- yieldse0
- Direction
- Maximume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yields were obtained when the fertilizer was banded 2.5 cm away from the seed (PSS, PBS).”
t0“rape”
Claim · model-written summary
Broadcast and cultivated placement gave the least growth, yield and P uptake responses.
- Taxon
- rapeBrassica napust0
- Treatment
- BC methode0
- Outcome
- growth, yield and P‐uptake responsese0
- Direction
- leaste0
- Comparator
- four methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The BC method produced the least growth, yield and P‐uptake responses of the four methods.”
t0“rape”
Claim · model-written summary
Broadcast P above 10 kg/ha increased dry matter, seed and P uptake.
- Taxon
- rapeBrassica napuse0
- Treatment
- broadcast rates of P were in excess of 10 kg/hae0
- Outcome
- rape dry matter, seed and P‐uptakee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only when broadcast rates of P were in excess of 10 kg/ha did rape dry matter, seed and P‐uptake increase.”
Claim · model-written summary
Banding 10 kg/ha with or near seed matched broadcasting 25 kg/ha for seed yield and P uptake.
- Taxon
- rapeBrassica napust0
- Treatment
- Banding 10 kg/ha with or near to the seede0
- Outcome
- seed yield and P‐uptakee0
- Direction
- equivalente0
- Comparator
- broadcasting 25 kg/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Banding 10 kg/ha with or near to the seed was equivalent to broadcasting 25 kg/ha in terms of seed yield and P‐uptake.”
t0“rape”
Claim · model-written summary
P fertilizer increased seed protein and oil concentrations.
- Taxon
- rapeBrassica napust0
- Treatment
- P fertilizere0
- Outcome
- seed protein and oil concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of P fertilizer also increased seed protein and oil concentrations.”
t0“rape”
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See all 378 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.