Abstract
The experiments were conducted to verify the effect of doses and application time of boron (B) in the grain yield of maize and to study different plant tissues as a nutritional diagnosis tool for B. Six doses of B (0, 1, 2, 3, 4 and 12 kg ha−1) and two application times (before at sowing and V6 growth stage) were tested. In the first growing season, the B doses and application time did not influence yield components of maize. While the second growing season, B application reached maximum grain yield with 5.0 kg ha−1 at sowing, but at a high dose provided toxicity causing injuries in the cobs. In general, the B content in the leaf at flowering stage was higher with the application at V6 growth stage. B content and distribution in the leaves close to the cob vary with the rainfall that occurs before to the collection, harming the definition of the critical leaf level. The B content in the silk can be a reliable alternative for checking the deficiency or toxicity of this nutrient in the plant, presenting critical level for deficiency (calculated) of 23.2 mg kg−1 while values above 31.5 mg kg−1 can be considered toxic.
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Claims 7
Claim · model-written summary
Boron dose and timing did not influence maize yield components in the first growing season.
- Treatment
- B doses and application timee0
- Outcome
- yield componentse0
- Direction
- did not influencee0
- Qualifier
- first growing seasone0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first growing season, the B doses and application time did not influence yield components of maize.”
Claim · model-written summary
At sowing, a boron dose of 5.0 kg ha−1 gave the maximum maize grain yield in the second growing season.
- Treatment
- B applicatione0
- Outcome
- grain yielde0
- Direction
- maximume0
- Value
- 5.0 kg ha−1e0
- Qualifier
- second growing seasone0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While the second growing season, B application reached maximum grain yield with 5.0 kg ha−1 at sowing”
t0“in Maize”
Claim · model-written summary
A high boron dose caused toxicity injuries in maize cobs in the second season.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the second growing season, B application reached maximum grain yield with 5.0 kg ha−1 at sowing, but at a high dose provided toxicity causing injuries in the cobs”
t0“in Maize”
Claim · model-written summary
Applying boron at V6 generally increased leaf boron content at flowering.
- Organ / stage
- flowering stagee0
- Treatment
- application at V6 growth stagee0
- Outcome
- B content in the leafe0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, the B content in the leaf at flowering stage was higher with the application at V6 growth stage.”
t0“in Maize”
Claim · model-written summary
Rainfall before sampling changed boron content and distribution in leaves near the cob, impairing definition of a critical leaf level.
- Treatment
- rainfall that occurs before to the collectione0
- Outcome
- B content and distribution in the leaves close to the cobe0
- Direction
- varye0
- Qualifier
- harming the definition of the critical leaf levele0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“B content and distribution in the leaves close to the cob vary with the rainfall that occurs before to the collection, harming the definition of the critical leaf level.”
t0“in Maize”
Claim · model-written summary
Silk boron content was proposed as a diagnostic for maize boron deficiency, with a calculated critical level of 23.2 mg kg−1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The B content in the silk can be a reliable alternative for checking the deficiency or toxicity of this nutrient in the plant, presenting critical level for deficiency (calculated) of 23.2 mg kg−1”
t0“in Maize”
Claim · model-written summary
Silk boron content above 31.5 mg kg−1 was considered toxic for maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“values above 31.5 mg kg−1 can be considered toxic”
t0“in Maize”
e1“The B content in the silk can be a reliable alternative for checking the deficiency or toxicity of this nutrient in the plant”
The same questions in other papers
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See all 5 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.