Abstract
Nitrogen (N) is the most important fertiliser element determining the productivity of wheat. N nutrition is known to affect the level of stripe rust infection, with higher N associated with increased disease severity. Stripe rust, caused by Puccinia striiformis f. sp. tritici , is a major yield-limiting disease of wheat in Australia. This paper describes experiments designed to investigate the agronomic response to the interaction of various levels of N application and stripe rust severity in wheat varieties differing in response. Experimental plots were established in crop seasons 2006 and 2007 on the Liverpool Plains of northern NSW, Australia. Yield, biomass, grain protein content (GPC) and harvest index (HI) data were recorded. Increased rates of N increased the severity of stripe rust during grain filling. N application also increased yield and GPC in all varieties in both years. Stripe rust reduced the yield of the rust-susceptible wheat varieties, and GPC and proportion of added N recovered in the grain were also reduced in one year but not the other. It was evident from our experiment that stripe rust caused yield loss accompanied by either no change or reduction in GPC, indicating that the total amount of N entering the grain was reduced by stripe rust. The effects of stripe rust on N yield are most likely associated with reduced uptake of N during grain filling.
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Claims 6
Claim · model-written summary
Increased rates of N increased the severity of stripe rust in wheat during grain filling.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Increased rates of Ne1
- Interactor
- Puccinia striiformis f. sp. tritici
Puccinia striiformis f. sp. triticie0pathogen - Outcome
- severity of stripe ruste1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e0“caused by Puccinia striiformis f. sp. tritici”
e1“Increased rates of N increased the severity of stripe rust during grain filling”
Claim · model-written summary
N application increased yield and grain protein content (GPC) in all wheat varieties in both years.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- N applicatione2
- Outcome
- yield and GPCe2
- Direction
- increasede2
- Qualifier
- in all varieties in both yearse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e2“N application also increased yield and GPC in all varieties in both years”
Claim · model-written summary
Stripe rust reduced the yield of rust-susceptible wheat varieties.
- Taxon
- wheatTriticum aestivumt0
- Material
- rust-susceptible wheat varietiese3
- Treatment
- Stripe ruste3
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie0pathogen
- Outcome
- yielde3
- Direction
- reducede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e0“caused by Puccinia striiformis f. sp. tritici”
e3“Stripe rust reduced the yield of the rust-susceptible wheat varieties”
Claim · model-written summary
Stripe rust caused yield loss with no change or a reduction in wheat GPC.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- stripe ruste4
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie0pathogen
- Outcome
- GPCe4
- Direction
- no change or reductione4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e0“caused by Puccinia striiformis f. sp. tritici”
e4“stripe rust caused yield loss accompanied by either no change or reduction in GPC”
Claim · model-written summary
Stripe rust reduced the GPC and the proportion of added N recovered in the grain in one year but not the other.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- stripe ruste4
- Interactor
- Puccinia striiformis f. sp. triticiPuccinia striiformis f. sp. triticie0pathogen
- Outcome
- GPC and proportion of added N recovered in the graine5
- Direction
- reducede5
- Qualifier
- in one year but not the othere5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e4“stripe rust caused yield loss accompanied by either no change or reduction in GPC”
e0“caused by Puccinia striiformis f. sp. tritici”
e5“GPC and proportion of added N recovered in the grain were also reduced in one year but not the other”
Claim · model-written summary
The effect of stripe rust on grain N yield is most likely associated with reduced N uptake during grain filling.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- stripe ruste6
- Outcome
- N yielde6
- Qualifier
- reduced uptake of N during grain fillinge6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“the yield response of wheat to nitrogen”
e6“The effects of stripe rust on N yield are most likely associated with reduced uptake of N during grain filling”
The same questions in other papers
nitrogen · quality: protein · Triticum aestivum (wheat)Positive and negative results
399 papers in the same direction as this paper · 47 in the opposite direction · 7 reporting no difference from an alternative
- negative
- no effect
- negative
450 papers more in this group
See all 454 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.