Abstract
Abstract Limited information exists as to the effect of liquid swine manure on soil phosphorus (P) availability in Western Canadian soil. Swine manure is most often applied to meet additional requirements for nitrogen (N) and research to date has emphasized N effects. The effect of swine manure and urea on P supply to canola was investigated under controlled environment condition. Canola (Brassica napus) was grown in pots with manure or urea added to two Saskatchewan soils (sandy loam and clay loam) at 0 and 100 mg N kg‐1. Plants were grown to maturity, and yield and nutrient content were determined. Phosphorus supply rates in soils were measured in the pots using anion exchange resin membrane probes. Additions of swine manure and urea enhanced canola P accumulation and led to a higher proportion of P in seeds. This response was more evident in the manure treatment than with urea. Soil amended with manure significantly increased N and P supply rates in soils as the manure contains N and P. On the contrary, application of urea significantly increased N supply rate, but led to a slight decrease in the measured soil supply rate of available P. Despite the apparent decrease in soil supply of available P in urea treatment, canola maintained its N:P ratio by increasing P absorption, possibly due to a greater root mass.
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Claims 7
Claim · model-written summary
Swine manure increased canola phosphorus accumulation.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- swine manuree0
- Outcome
- canola P accumulatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Additions of swine manure and urea enhanced canola P accumulation”
t0“canola”
Claim · model-written summary
Urea increased canola phosphorus accumulation.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- ureae0
- Outcome
- canola P accumulatione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additions of swine manure and urea enhanced canola P accumulation”
Claim · model-written summary
Manure and urea raised the proportion of phosphorus in canola seeds, more evidently with manure.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- manure treatmente0
- Outcome
- proportion of P in seedse0
- Direction
- highere0
- Qualifier
- more evidente0
- Comparator
- ureae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Additions of swine manure and urea enhanced canola P accumulation and led to a higher proportion of P in seeds. This response was more evident in the manure treatment than with urea.”
Claim · model-written summary
Manure significantly increased soil nitrogen and phosphorus supply rates in canola pots.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- manuree0
- Outcome
- N and P supply rates in soilse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil amended with manure significantly increased N and P supply rates in soils as the manure contains N and P.”
t0“canola”
Claim · model-written summary
Urea significantly increased soil nitrogen supply rate.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- ureae0
- Outcome
- N supply ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of urea significantly increased N supply rate”
t0“canola”
Claim · model-written summary
Urea slightly decreased measured soil available phosphorus supply rate.
- Taxon
- canolaBrassica napus var. napust0
- Treatment
- ureae0
- Outcome
- measured soil supply rate of available Pe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of urea significantly increased N supply rate, but led to a slight decrease in the measured soil supply rate of available P.”
t0“canola”
Claim · model-written summary
Despite lower available soil phosphorus supply under urea, canola maintained its nitrogen-to-phosphorus ratio by absorbing more phosphorus.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- urea treatmente0
- Outcome
- maintained its N:P ratioe0
- Qualifier
- increasing P absorption, possibly due to a greater root masse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Despite the apparent decrease in soil supply of available P in urea treatment, canola maintained its N:P ratio by increasing P absorption, possibly due to a greater root mass.”
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See all 109 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.