Abstract
Identical experiments were conducted at the Elora Research Station, near Guelph, Ontario in 1970 and 1971 with the objective of determining the relationships among whole-plant dry matter (DM) yield, whole-plant moisture content, and grain moisture content of corn (Zea mays L.) during the later part of the growing season. Each experiment involved eight commercial hybrids representative of the range in maturity, endosperm type, lodging resistance, and grain yield potential of corn hybrids grown commercially in central Ontario. The hybrids were sampled at weekly intervals over an 8-wk period beginning approximately 1 September; the sampled plants were divided into their leaf, stalk, husk, ear and grain components and oven-dried. Fresh and dry weights were used to calculate dry matter (DM) yields and "at harvest" moisture contents of the various components, and of the entire plant. Averaged across the eight hybrids, maximum DM yield was attained at whole-plant moisture content of 66–70%, and a grain moisture content of 45–50%. Among hybrids, 66% whole-plant moisture corresponded to a range in grain moisture content from 41 to 47%. Two additional experiments were grown also at Elora in 1970 and 1971 to evaluate the effects of harvest date on the DM yield and in vitro digestibility of corn plants and their component plant parts. Each experiment involved four representative commercial hybrids which were sampled at four equal time intervals during the month of September, and divided into grain, cob, husks (including shank) and stover (including leaves, leaf sheaths, stalks and tassels) for dry weight and in vitro digestibility measurement. Whole-plant DM digestibility was essentially constant over a range of whole-plant moisture from 76 to 56% in 1970, and from 76 to 64% in 1971. The consistency of whole-plant digestibility was the result of compensating changes in component yield and digestibility. A decrease in the digestibility of the stover, husks and cob with delayed harvest was compensated for by an increase in the proportion of grain in the whole-plant yield.
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Claims 5
Claim · model-written summary
Maximum corn dry matter yield was attained at 66–70% whole-plant moisture and 45–50% grain moisture.
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- maximum DM yielde1
- Qualifier
- whole-plant moisture content of 66–70%, and a grain moisture content of 45–50%e1
- Setting
- Elora Research Statione2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain moisture content of corn (Zea mays L.) during the later part of the growing season”
e1“Averaged across the eight hybrids, maximum DM yield was attained at whole-plant moisture content of 66–70%, and a grain moisture content of 45–50%”
e2“Identical experiments were conducted at the Elora Research Station, near Guelph, Ontario in 1970 and 1971”
Claim · model-written summary
Among hybrids, 66% whole-plant moisture corresponded to grain moisture content from 41 to 47%.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- 66% whole-plant moisturee3
- Outcome
- grain moisture contente3
- Value
- from 41 to 47%e3
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain moisture content of corn (Zea mays L.) during the later part of the growing season”
e3“Among hybrids, 66% whole-plant moisture corresponded to a range in grain moisture content from 41 to 47%”
Claim · model-written summary
Whole-plant DM digestibility stayed essentially constant over a range of whole-plant moisture from 76 to 56% in 1970.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- Whole-plant DM digestibilitye4
- Qualifier
- essentially constant over a range of whole-plant moisture from 76 to 56% in 1970e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain moisture content of corn (Zea mays L.) during the later part of the growing season”
e4“Whole-plant DM digestibility was essentially constant over a range of whole-plant moisture from 76 to 56% in 1970, and from 76 to 64% in 1971”
Claim · model-written summary
Delayed harvest decreased the digestibility of stover, husks and cob.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- delayed harveste5
- Outcome
- digestibility of the stover, husks and cobe5
- Direction
- decreasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain moisture content of corn (Zea mays L.) during the later part of the growing season”
e5“A decrease in the digestibility of the stover, husks and cob with delayed harvest was compensated for by an increase in the proportion of grain in the whole-plant yield”
Claim · model-written summary
Delayed harvest increased the proportion of grain in the whole-plant yield, compensating for the lower digestibility.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- delayed harveste5
- Outcome
- proportion of grain in the whole-plant yielde5
- Direction
- increasee5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“grain moisture content of corn (Zea mays L.) during the later part of the growing season”
e5“A decrease in the digestibility of the stover, husks and cob with delayed harvest was compensated for by an increase in the proportion of grain in the whole-plant yield”
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See all 98 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.