Abstract
Improvements in rice ( Oryza sativa L.) production in the mid‐south United States have been made through advances in N management, harvest strategies, and cultivar selection. Efficient fertilizer‐N management is important for producing large yields. Harvest moisture content (HMC) affects grain quality [i.e., milled rice yield (MRY) and head rice yield (HRY)], as harvesting above or below optimum HMC results in decreased milling yields. Research was conducted from 2011 to 2013 investigating rough rice and milling yields as affected by fertilizer‐N application (0, 45, 90, 135, and 180 kg N ha −1 ), HMC (high, medium, and low), and cultivar (‘Cheniere’, ‘CLXL745’, and ‘Wells’). Maximum rough rice yields of 8916, 10,263, and 9353 kg ha −1 were calculated at N rates of 135, 149, and 146 kg N ha −1 for Cheniere, CLXL745, and Wells, respectively. At N rates to achieve maximum rough rice yield, MRY and HRY were 98 to 99.9% of the maximum milling yield within a cultivar‐HMC combination, excluding Wells harvested at low HMC. Within a cultivar–HMC combination, HRYs were <1 to 25% points greater at the maximum HRY–producing N rate than the minimum. Nitrogen rates needed to maximize rough rice yield and harvesting at high and medium HMC lead to near‐maximum HRYs; however, harvest at low N rates and HMC reduced HRY, particularly for CLXL745 and Wells. Further research focused on other hybrid and pure‐line rice cultivars will ensure that the current data are consistent for a wide range of cultivars.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Cheniere maximum rough rice yield was 8916 kg ha −1 at 135 kg N ha −1.
- Taxon
- Rice
Oryza sativat0 - Material
- Chenieree0
- Treatment
- 135, 149, and 146 kg N ha −1e0
- Outcome
- rough rice yieldse0
- Direction
- Maximume0
- Value
- 8916, 10,263, and 9353 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum rough rice yields of 8916, 10,263, and 9353 kg ha −1 were calculated at N rates of 135, 149, and 146 kg N ha −1 for Cheniere, CLXL745, and Wells, respectively.”
t0“Rice”
Claim · model-written summary
At nitrogen rates for maximum rough yield, milling yields were 98 to 99.9% of cultivar and harvest moisture maxima, except Wells at low moisture.
- Taxon
- RiceOryza sativat0
- Outcome
- MRY and HRYe0
- Value
- 98 to 99.9%e0
- Qualifier
- excluding Wells harvested at low HMCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At N rates to achieve maximum rough rice yield, MRY and HRY were 98 to 99.9% of the maximum milling yield within a cultivar‐HMC combination, excluding Wells harvested at low HMC.”
t0“Rice”
Claim · model-written summary
Head rice yields were under 1 to 25 percentage points greater at the maximum rather than minimum head yield nitrogen rate.
- Taxon
- RiceOryza sativat0
- Outcome
- HRYse0
- Direction
- greatere0
- Value
- <1 to 25% pointse0
- Comparator
- the minimume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Within a cultivar–HMC combination, HRYs were <1 to 25% points greater at the maximum HRY–producing N rate than the minimum.”
t0“Rice”
Claim · model-written summary
Low nitrogen rate and low harvest moisture reduced head rice yield, especially in CLXL745 and Wells.
- Taxon
- RiceOryza sativat0
- Treatment
- low N rates and HMCe0
- Outcome
- HRYe0
- Direction
- reducede0
- Qualifier
- particularly for CLXL745 and Wellse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“harvest at low N rates and HMC reduced HRY, particularly for CLXL745 and Wells”
t0“Rice”
The same questions in other papers
nitrogen · quality: grain · Oryza sativa (rice)Results differ
20 papers in the same direction as this paper · 81 in the opposite direction
- positive
- positive
- negative
98 papers more in this group
See all 102 papers →soil water · quality: grain · Oryza sativa (rice)Positive and negative results
6 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
5 papers more in this group
See all 9 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.