Abstract
Zea mays was grown on a low N nutrient solution under 16 conditions of light and temperature in a crossed-gradient room in an attempt to determine whether or not variation in climatic conditions influences N(2) fixation by the association between maize and Spirillum lipoferum. Temperatures were 28, 32, 36, and 40 C and 10 C lower at night; light intensities were 500, 1,250, 2,400, and 3,000 ft-c. Plants harvested after 94 days showed no significant benefit from association with S. lipoferum either in dry weight production or in total N content; variations in temperature and light had only a small influence on N(2) fixation under the conditions tested. Measurements of total N, together with designated assumptions, indicated that less than the equivalent of 0.5 kilogram of N was fixed/hectare during the entire growing period by the maize-S. lipoferum association. Rates of C(2)H(2) reduction by replicate root samples generally were low and variable and did not correlate with the measurements of total N.
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Claims 4
Claim · model-written summary
Association with S. lipoferum gave no significant benefit to maize dry weight or total N.
- Treatment
- association with S. lipoferume1
- Interactor
- S. lipoferum
Azospirillum brasilensee1symbiont - Outcome
- dry weight production or in total N contente1
- Direction
- no significant benefite1
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Light and Temperature on the Association between Zea mays and Spirillum lipoferum”
e1“Plants harvested after 94 days showed no significant benefit from association with S. lipoferum either in dry weight production or in total N content”
Claim · model-written summary
Temperature and light had only a small influence on N2 fixation by the maize association.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Light and Temperature on the Association between Zea mays and Spirillum lipoferum”
e2“variations in temperature and light had only a small influence on N(2) fixation under the conditions tested”
Claim · model-written summary
The maize and S. lipoferum association fixed less than 0.5 kg N per hectare over the growing period.
- Interactor
- S. lipoferumAzospirillum brasilensee3symbiont
- Outcome
- fixed/hectaree3
- Value
- less than the equivalent of 0.5 kilogram of Ne3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Light and Temperature on the Association between Zea mays and Spirillum lipoferum”
e3“less than the equivalent of 0.5 kilogram of N was fixed/hectare during the entire growing period by the maize-S. lipoferum association”
Claim · model-written summary
C2H2 reduction rates in replicate maize root samples did not correlate with total N measurements.
- Organ / stage
- replicate root samplese4
- Outcome
- C(2)H(2) reductione4
- Direction
- did not correlatee4
- Qualifier
- generally were low and variablee4
- Comparator
- measurements of total Ne4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Effects of Light and Temperature on the Association between Zea mays and Spirillum lipoferum”
e4“Rates of C(2)H(2) reduction by replicate root samples generally were low and variable and did not correlate with the measurements of total N”
The same questions in other papers
Azospirillum brasilense · yield · Zea mays (maize)Results differ
10 papers in the same direction as this paper · 42 in the opposite direction
- positive
- positive
- positive
49 papers more in this group
See all 53 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.