Abstract
Abstract In the year 1979, 1981 and 1982 two‐factorial experiments with the factors genotypes and crop densities were conducted, connected with the following agrometeorological analyses: a) outside the canopies: determination of air temperature, air humidity, wind velocity, precipitation, global radiation and photosynthetically active radiation (PAR) b) in the interior of the canopies: measurements of air temperature at cobheight, of precipitation components, of the penetration of PAR and of the leaf area index. The following results were obtained: a) Influence of high crop densities 1. In high crop densities the greatest part of radiation was absorbed, so that at 30 plants/m 2 57% and at 70 plants/m 2 only 28% of the PAR reached cob height. 2. As a consequence of temperature and decrease of radiation the contents in the leaves of biological energy, of water soluble K.H. and rough protein were reduced. b) Influence of the leaf posture 3. For genotypes with erected leaf posture the leaf temperatures increased by 0.3°C, on the ground even by 1.2°C above the values of the stand with horizontal leaf posture. 4. Higher air temperatures were measured in the stands with erected leaf posture than in those with a horizontal one. 5. In the cool year 1981 on days with temperatures above 27°C outside the stands, those temperatures were exceeded during 7 hours in canopies with erected leaf posture at a higher plant density (30 plants/m 2 ) and only during 2 hours in canopies with a horizontal leaf posture.
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Claims 7
Claim · model-written summary
At 30 plants/m 2, 57% of PAR reached maize cob height.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 30 plants/m 2 57% and at 70 plants/m 2 only 28% of the PAR reached cob height”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
Claim · model-written summary
At 70 plants/m 2, only 28% of PAR reached maize cob height.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 30 plants/m 2 57% and at 70 plants/m 2 only 28% of the PAR reached cob height”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
Claim · model-written summary
High density reduced leaf biological energy, water-soluble carbohydrate and crude protein contents.
- Treatment
- high crop densitiese1
- Outcome
- biological energy, of water soluble K.H. and rough proteine0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As a consequence of temperature and decrease of radiation the contents in the leaves of biological energy, of water soluble K.H. and rough protein were reduced.”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
e1“Influence of high crop densities”
Claim · model-written summary
Erect-leaf genotypes had leaf temperatures 0.3°C above horizontal-leaf stands.
- Material
- genotypes with erected leaf posturee0
- Outcome
- leaf temperaturese0
- Direction
- increasede0
- Value
- 0.3°Ce0
- Comparator
- stand with horizontal leaf posturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For genotypes with erected leaf posture the leaf temperatures increased by 0.3°C, on the ground even by 1.2°C above the values of the stand with horizontal leaf posture.”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
Claim · model-written summary
Erect-leaf genotypes had ground temperatures 1.2°C above horizontal-leaf stands.
- Material
- erected leaf posturee1
- Outcome
- on the grounde0
- Direction
- abovee0
- Value
- 1.2°Ce0
- Comparator
- stand with horizontal leaf posturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the ground even by 1.2°C above the values of the stand with horizontal leaf posture”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
e1“genotypes with erected leaf posture”
Claim · model-written summary
Air temperature was higher in erect-leaf stands than horizontal-leaf stands.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher air temperatures were measured in the stands with erected leaf posture than in those with a horizontal one.”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”
Claim · model-written summary
In 1981, temperatures above 27°C lasted seven hours in dense erect-leaf canopies versus two hours in horizontal-leaf canopies.
- Material
- erected leaf posturee0
- Outcome
- temperatures were exceedede0
- Direction
- exceedede0
- Value
- 7 hourse0
- Qualifier
- 30 plants/m 2e0
- Comparator
- horizontal leaf posturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those temperatures were exceeded during 7 hours in canopies with erected leaf posture at a higher plant density (30 plants/m 2 ) and only during 2 hours in canopies with a horizontal leaf posture.”
t0“Micrometeorological Influences at High Crop Density on Different Genotypes of Silage Maize”