Abstract
To clarify whether P had a direct or indirect effect on the nodulation process of soybean grown in acid soils from Sitiung, West Sumatra, Indonesia, a series of rhizotron experiments, with special attention given to formation of nodule primordia, was conducted at Laboratory of Microbiology, Wageningen University in 1998-2000. It was shown that Ca and P were essential nutrients for root growth, nodule formation, and growth of soybean in the acid soils (Oxisols). Ca increased root growth, number of nodule primordia, nodules, and growth of the soybean plant. This positive effect of Ca was increased considerably by the application of P. Ca and P have a synergistic effect on biological nitrogen fixation (BNF) of soybean in acid soils. Ca is important for the establishment of nodules, whilst P is essential for the development and function of the formed nodules. P increased number of nodule primordia, thus it also has an important role in the initiation of nodule formation. From this study, it can be concluded that Ca and P are the most limiting nutrients for BNF of soybean in the acid soils of Sitiung, West Sumatra, Indonesia.
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Claims 9
Claim · model-written summary
Calcium increased soybean root growth.
- Taxon
- soybean
Glycine maxe0 - Treatment
- Cae0
- Outcome
- root growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca increased root growth, number of nodule primordia, nodules, and growth of the soybean plant.”
Claim · model-written summary
Calcium increased soybean nodule primordia and nodules.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Cae0
- Outcome
- number of nodule primordia, nodulese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca increased root growth, number of nodule primordia, nodules, and growth of the soybean plant.”
Claim · model-written summary
Calcium increased soybean plant growth.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Cae0
- Outcome
- growth of the soybean plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca increased root growth, number of nodule primordia, nodules, and growth of the soybean plant.”
Claim · model-written summary
Phosphate considerably increased the positive calcium effect on soybean.
- Taxon
- SOYBEANGlycine maxt0
- Treatment
- application of Pe0
- Outcome
- positive effect of Cae0
- Direction
- increasede0
- Comparator
- Cae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This positive effect of Ca was increased considerably by the application of P.”
t0“SOYBEAN”
Claim · model-written summary
Calcium and phosphate acted synergistically on soybean biological nitrogen fixation.
- Taxon
- soybeanGlycine maxe0
- Treatment
- Ca and Pe0
- Outcome
- biological nitrogen fixation (BNF)e0
- Direction
- synergistic effecte0
- Setting
- acid soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca and P have a synergistic effect on biological nitrogen fixation (BNF) of soybean in acid soils.”
Claim · model-written summary
Calcium was important for establishing soybean nodules.
- Taxon
- SOYBEANGlycine maxt0
- Treatment
- Cae0
- Outcome
- establishment of nodulese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca is important for the establishment of nodules, whilst P is essential for the development and function of the formed nodules.”
t0“SOYBEAN”
Claim · model-written summary
Phosphate was essential for development and function of formed soybean nodules.
- Taxon
- SOYBEANGlycine maxt0
- Treatment
- Pe0
- Outcome
- development and function of the formed nodulese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P is essential for the development and function of the formed nodules.”
t0“SOYBEAN”
Claim · model-written summary
Phosphate increased the number of soybean nodule primordia.
- Taxon
- SOYBEANGlycine maxt0
- Treatment
- Pe0
- Outcome
- number of nodule primordiae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P increased number of nodule primordia”
t0“SOYBEAN”
Claim · model-written summary
Calcium and phosphate were identified as the most limiting nutrients for soybean biological nitrogen fixation in Sitiung acid soils.
- Taxon
- soybeanGlycine maxe0
- Outcome
- BNFe0
- Qualifier
- most limiting nutrientse0
- Setting
- Sitiung, West Sumatra, Indonesiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca and P are the most limiting nutrients for BNF of soybean in the acid soils of Sitiung, West Sumatra, Indonesia.”
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See all 124 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.