Abstract
Abstract Winter wheat ( Triticum aestivum L.) and rye ( Secale cereale L.) can be grown successfully in most parts of western Canada if sown directly into standing stubble. However, soil N is usually limiting under this production system. Consequently, 40 field trials were conducted over a range of soil types and environmental conditions to determine yield and other agronomic responses of no‐till winter wheat and rye to N fertilizer applied in the spring. Each trial consisted of three to 12 replications with N rates of 0 to 303 kg ha −1 . Nitrogen fertilizer had little effect on days to heading, days to maturity, test weight, and seed weight. Increased N resulted in height increases of up to 25 cm in wheat and 8 cm in rye in some trials, and decreases of up to 9 cm in both wheat and rye in other trials. Winter rye demonstrated a greater N use efficiency and yield potential than winter wheat. The relationships between grain yield (Y) and total available N were best described by modified inverse polynomials, Y = (1 − N/903) u N/(N + u /65.8) for wheat, and Y = (1 − N/800) u N/(N + u /88.5) for rye, where u represents the upper limit of yield when N is not limiting. These curves accounted for 99.3 and 98.7% of the observed variation in grain yield of wheat and rye, respectively. Maximum yields were related to moisture status during the growing season and were achieved at different rates of N fertilization.
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Claims 9
Claim · model-written summary
Nitrogen fertilizer had little effect on heading, maturity, test weight and seed weight in winter wheat and rye.
- Taxon
- Winter wheat and rye
Secale cereale
Triticum aestivumt0 - Treatment
- Nitrogen fertilizere0
- Outcome
- days to heading, days to maturity, test weight, and seed weighte0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen fertilizer had little effect on days to heading, days to maturity, test weight, and seed weight.”
t0“Winter Wheat and Rye”
Claim · model-written summary
Increased N raised wheat height by up to 25 cm in some trials.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Increased Ne0
- Outcome
- heighte0
- Direction
- increasese0
- Value
- up to 25 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased N resulted in height increases of up to 25 cm in wheat and 8 cm in rye in some trials”
Claim · model-written summary
Increased N raised rye height by up to 8 cm in some trials.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased N resulted in height increases of up to 25 cm in wheat and 8 cm in rye in some trials”
Claim · model-written summary
Increased N reduced wheat and rye height by up to 9 cm in other trials.
- Taxon
- wheat and ryeSecale cerealeTriticum aestivume0
- Treatment
- Increased Ne1
- Outcome
- heighte1
- Direction
- decreasese0
- Value
- up to 9 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreases of up to 9 cm in both wheat and rye in other trials”
e1“Increased N resulted in height increases of up to 25 cm in wheat and 8 cm in rye in some trials”
Claim · model-written summary
Winter rye had greater N use efficiency than winter wheat.
- Taxon
- Winter ryeSecale cerealee0
- Outcome
- N use efficiencye0
- Direction
- greatere0
- Comparator
- winter wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter rye demonstrated a greater N use efficiency and yield potential than winter wheat.”
Claim · model-written summary
Winter rye had greater yield potential than winter wheat.
- Taxon
- Winter ryeSecale cerealee0
- Outcome
- yield potentiale0
- Direction
- greatere0
- Comparator
- winter wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter rye demonstrated a greater N use efficiency and yield potential than winter wheat.”
Claim · model-written summary
Modified inverse polynomials explained 99.3% of observed wheat grain-yield variation.
- Taxon
- wheatTriticum aestivume0
- Outcome
- observed variation in grain yielde0
- Value
- 99.3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These curves accounted for 99.3 and 98.7% of the observed variation in grain yield of wheat and rye, respectively.”
Claim · model-written summary
Modified inverse polynomials explained 98.7% of observed rye grain-yield variation.
- Taxon
- ryeSecale cerealee0
- Outcome
- observed variation in grain yielde0
- Value
- 98.7%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These curves accounted for 99.3 and 98.7% of the observed variation in grain yield of wheat and rye, respectively.”
Claim · model-written summary
Maximum yields were related to growing-season moisture and attained at different N rates.
- Taxon
- Winter Wheat and RyeSecale cerealeTriticum aestivumt0
- Treatment
- N fertilizatione0
- Outcome
- Maximum yieldse0
- Qualifier
- moisture status during the growing seasone0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum yields were related to moisture status during the growing season and were achieved at different rates of N fertilization.”
t0“Winter Wheat and Rye”
The same questions in other papers
fertilization · quality: grain · Triticum aestivum (wheat)Positive and negative results
34 papers in the same direction as this paper · 119 in the opposite direction
- positive
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